Browse Topic: Steel

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Steel Bars, Forgings, and Mechanical Tubing and Forging Stock, 1.1Si - 1.45Cr - 1.0Mo - 0.08Al (0.16 - 0.22C), [CBS600], Premium Aircraft-Quality, Double Vacuum MeltedAMS6255H (Current)10/16/2026
This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Steel Bars, Wire, Forgings and Forging Stock, Mechanical Tubing, Rings, and Extrusions, Corrosion-Resistant, 11.8Cr - 2.5Ni - 1.8Mo - 0.33V (0.08 - 0.15C) (M152), Annealed, Vacuum Arc or Electroslag RemeltedAMS5719F (Current)10/16/2026
This specification covers a premium aircraft-quality, corrosion-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and extrusions 7.00 inches (177.8 mm) and under in nominal diameter or least distance between parallel sides and stock of any size for forging, flash-welded rings, or extruding.
AMS F Corrosion and Heat Resistant Alloys Committee
General Characteristics and Heat Treatments of SteelsJ412_202610 (Current)10/15/2026
The information and data contained in this SAE Information Report are intended as a guide in the selection of steel types and grades for various purposes. Consideration of the individual types of steel is preceded by a discussion of the factors affecting steel properties and characteristics. SAE J4xx steels are generally purchased on the basis of chemical composition requirements (SAE J403, SAE J404, and SAE J405). High-strength, low-alloy (HSLA) steels (SAE J1392 and SAE J1442) are generally purchased on the basis of mechanical properties; different chemical compositions are used to achieve the specified mechanical properties. Because these steels are characterized by their special mechanical properties obtained in the as-rolled condition, they are not intended for any heat treatment by the purchaser either before, during, or after fabrication. In many instances, as in the case of steels listed in SAE J1268 and SAE J1868, hardenability is also a specification requirement. This information report can be used as a reference for determining the general characteristics and applications of commonly used SAE steels. The use of the typical heat treatments listed in Tables 1 through 7 is recommended. These and other heat treatments commonly used on steel are briefly described at the end of this section.
Metals Technical Committee
Steel, Corrosion-Resistant, Seamless and Welded Aircraft Tubing, 19Cr - 9.5Ni (SAE 304), Cold Drawn, 1/2 Hard TemperAMS5868D (Current)10/9/2026
This specification covers a corrosion-resistant steel in the form of two types of aircraft tubing.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Corrosion-Resistant, Sheet, Strip, and Plate, 15Cr - 4.5Ni - 0.30Cb (Nb) - 3.5Cu (15-5 PH®), Consumable Electrode Remelted, Premium Aircraft Quality, Solution Heat Treated and Precipitation-Hardened (H1075)AMS5862/H1075 (Current)10/9/2026
This specification covers a corrosion-resistant steel product in the solution and precipitation heat treated (H1075) condition, 4 inches (102 mm) and under in nominal thickness.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Corrosion-Resistant, Bars, Wire, and Forgings, and Forging Stock, 17Cr - 0.52Mo (0.95 - 1.20C) (440C), for Bearing ApplicationsAMS5923B (Current)9/25/2026
This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, and forging stock.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Corrosion-Resistant, Plate, 13Cr - 8.0Ni - 2.2Mo - 1.1Al (PH 13-8 Mo), Premium Aircraft-Quality, Vacuum Induction Plus Consumable Electrode Melted, Solution Heat Treated, Precipitation HardenableAMS5864E (Current)9/25/2026
This specification covers a corrosion-resistant steel in the form of plate up to 3.00 inches (76.2 mm), inclusive, in nominal thickness.
AMS F Corrosion and Heat Resistant Alloys Committee
Balancing Durability and Deployability: Enhanced Situational Awareness (ESA) for Non-Combat Tactical Vehicles2026-01-75409/22/2026
The persistent rate of accidents and fatalities involving legacy tactical military vehicles underscores a critical need for Enhanced Situational Awareness (ESA) technologies. However, the prohibitive cost and lengthy development cycles associated with full MIL-STD ruggedization often prevent these safety systems from reaching the in-service non-combat vehicles with limited driver visibility. This paper suggests a strategic shift in procurement policy: The adoption of relaxed ruggedization standards for vehicles operating in non-combat, administrative, and training roles. By deriving requirements from high-stress commercial sectors— such as heavy mining, steel production, and NASCAR racing—the military can utilize electronics designed for "extreme industrial" rather than "battlefield" environments. The principal objectives of this relaxation is cost reduction, lowering the barrier to entry and increasing the likelihood of ESA deployment across the legacy fleet. Furthermore, this approach aligns with Modular Open Systems Approach (MOSA) principles by enabling the integration of non-proprietary commercial devices. Utilizing these accessible technologies on legacy platforms creates a real-world testbed to evaluate technological advances rapidly. These insights can then inform and accelerate the development of future MIL-STD systems for combat vehicles, effectively shortening the traditional development life cycle while prioritizing the immediate enhanced protection of service member lives.
Pilgrim, Robert A., Brown, Roy C.
Steel, Maraging, Bars, Forgings, Mechanical Tubing, Rings, and Forging Stock, 18.5Ni - 9.0Co - 4.9Mo - 0.65Ti - 0.10Al (Maraging 300), Premium Aircraft Quality, Consumable Electrode Vacuum Remelted, AnnealedAMS6514L (Current)9/22/2026
This specification covers a premium aircraft-quality steel in the form of bars, forgings, mechanical tubing, flash-welded rings up through 10.000 inches (254.00 mm), inclusive, in diameter or least distance between parallel sides, and stock of any size for forging or flash-welded rings.
AMS E Carbon and Low Alloy Steels Committee
BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, FULL SHANK, STEEL AMS6322, CADMIUM PLATED, .3750-24 UNJF-3AAS9944C (Current)9/22/2026
E-25 General Standards for Aerospace and Propulsion Systems
BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, CADMIUM PLATED, STEEL, (UNS G87400), 125 KSI MIN, .1900-32 UNJF-3AAS9923D (Current)9/22/2026
E-25 General Standards for Aerospace and Propulsion Systems
Steel, Corrosion-Resistant, Investment Castings, 15Cr - 4.6Ni - 0.22Cb (Nb) - 2.8Cu (15-5 PH®), Solution Heat Treated, Precipitation HardenableAMS5357F (Current)9/21/2026
This specification covers a corrosion-resistant steel in the form of investment castings.
AMS F Corrosion and Heat Resistant Alloys Committee
FITTING END, ACORN, SHORT FLARELESS, DESIGN STANDARDAS4703B (Current)9/17/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
FITTING END, FLARELESS, BLUNT NOSE, DESIGN STANDARDAS4458C (Current)9/17/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Development and Production of Weight-Reduced Steel Hat Brake Discs: A Contribution to Automotive Lightweighting2026-01-08219/14/2026
The automotive industry's transition towards electrification, particularly in the passenger car (PC) and light commercial vehicle (LCV) segments, has intensified the focus on vehicle lightweighting to maximize battery range and efficiency. Conventional brake systems in electric vehicles (EVs) are subject to minimal mechanical wear due to regenerative braking, making corrosion the primary cause of component failure and replacement. This paper details the development and production of an innovative lightweight brake, which addresses these challenges. The "Cast-In" brake disc combines a traditional gray cast iron friction ring with a pre-finished, deep-drawn steel hat through a specialized composite casting process. This design achieves a significant reduction in unsprung mass—1.6 kg per disc in a 390mm x 36mm example—directly contributing to improved vehicle dynamics and energy efficiency. Key manufacturing challenges, including ensuring a robust material bond, preventing casting defects, and sealing the steel hat during casting, have been overcome through advanced process controls, simulation, and a patented sealing system. Furthermore, a novel, enhanced corrosion protection system has been developed and validated to meet the required service life of over 10 years, addressing the specific demands of e-mobility. With production scheduled to begin in April 2026, this technology is a milestone for modern braking solutions in the era of electrification.
von Reth, Thomas
FITTING ASSEMBLY, 45° ELBOW, EXTERNAL SWAGE TO FEMALE FLARELESS, HYDRAULICAS6468A (Current)9/11/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
FITTING ASSEMBLY, TEE, FEMALE FLARELESS TO EXTERNAL SWAGE ON RUN, EXTERNAL SWAGE ON BRANCH, HYDRAULICAS6471A (Current)9/11/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
FITTING, TEE, MALE FLARELESS TO EXTERNAL SWAGE ON RUN, FEMALE FLARELESS ON BRANCH, HYDRAULICAS8575A (Current)9/11/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
FITTING ASSEMBLY, TEE, EXTERNAL SWAGE ON RUN, FEMALE FLARELESS ON BRANCH, HYDRAULICAS6489A (Current)9/11/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
FITTING ASSEMBLY, 90° ELBOW, EXTERNAL SWAGE TO FEMALE FLARELESS, HYDRAULICAS6475A (Current)9/11/2026
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Conceptual Design of Steel Shell-UHPC Composite Pylon for Large-Span Suspension Bridges2026-99-15139/11/2026
With the rapid development of the transportation industry, heavy-duty traffic has become extremely common, particularly in some coastal port cities where the presence of container terminals leads to generally high vehicle axle loads. In these regions with an advanced transportation industry, large-scale cross-sea bridges are often required to ensure transport efficiency. However, conventional long-span bridge types, such as cable-stayed bridges and suspension bridges, face challenges in meeting the demands of heavy-duty traffic due to limitations imposed by the self-weight of pylons. In response, this paper proposes a prefabricated steel shell–ultra high performance concrete (SS–UHPC) composite pylon composed of basic SS–UHPC units, aiming to enhance both the load-carrying efficiency and seismic performance of the structure. A conceptual design of the SS–UHPC composite pylon was developed based on a super-long-span suspension bridge with a main span of 2180 m, and a comparative analysis was carried out against a conventional steel shell–normal concrete (SS–NC) composite pylon. The results show that, owing to the higher strength-to-self-weight ratio of UHPC, the SS–UHPC composite pylon achieves a 42.4% reduction in self-weight compared to the SS–NC composite pylon. Under the most unfavorable load condition, the axial force and transverse bending moment at the pylon base are reduced by 13.79% and 6.24%, respectively. Under maximum seismic load, the axial force and transverse bending moment at the base decrease by 14.12% and 28.92%, respectively, demonstrating improved load-carrying efficiency and seismic performance of the pylon. Although the life-cycle cost of the SS–UHPC composite pylon is higher than that of the SS–NC composite pylon, its superior mechanical behavior sufficiently offsets the cost difference. In conclusion, the superior mechanical behavior of the SS-UHPC composite pylon makes it better suited for application in long-span bridges subjected to heavy-duty transportation loads.
Chen, Jing Li, Liu, Yong Jian, Peng, Hong Bo, Sun, Li Peng, Yang, Ze Hong
Numerical Investigation of In-Plane Antisymmetric Failure Modes and Load-Carrying Mechanisms of Steel Portal Piers2026-99-15949/11/2026
A nonlinear finite element model was applied to study the in-plane instability of steel portal piers, in which initial geometric imperfections, welding residual stresses, and material nonlinearity were considered. The modeling procedure was compared with experimental results from box-section members, and consistent tendencies in load level and deformation evolution were observed. In the numerical analyses, the initial elastic buckling configuration exhibited an in-plane antisymmetric form. As loading continued beyond the elastic range, this deformation pattern persisted. With further loading, the deformation remained purely axial while combining compression with bending. During this stage, plastic hinges appeared near the column tops, while lateral displacement became clearly observable. Comparison models with different geometric proportions show that variations in the span-to-height ratio and the beam–column stiffness ratio influence how instability develops and where plastic deformation tends to localize. From a design perspective, these trends can be considered when distinguishing instability characteristics and selecting stiffness proportions between beams and piers.
Li, Jie, Shangguan, Bing, Cheng, Zhangxu, Ruan, Furong, Bai, Fan
Numerical Simulation Study on Borehole Wall Stability of Ultra-Large Diameter Deep Bored Piles in Thick Sand Strata2026-99-15829/11/2026
Taking the newly constructed Maanshan Yangtze River Highway-Railway Dual-Purpose Bridge — a three-tower steel truss cable-stayed bridge with two main spans of 1120 meters — as the research object, this study systematically explores the influencing factors and evolutionary characteristics of hole wall stability for large-diameter bored piles in thick sand layers. The research results reveal the following mechanisms: with the expansion of pile diameter, the hole wall generates greater deflection, the soil’s internal arch effect is gradually attenuated, soil cohesion decreases, and the plastic zone of the soil surrounding the pile shows a tendency of outward extension, collectively increasing the susceptibility to hole collapse. To maintain hole wall stability, the resultant force of the internal circular arch support and mud pressure must exceed or equal the total lateral pressure, including active earth pressure, formation water pressure, and ground surcharge-induced lateral pressure. Notably, soil shear strength and mud relative density are two dominant factors controlling hole wall stability, and a positive correlation exists between these two parameters and stability. Specifically, a mud relative density range of 1.15–1.25 is recommended for practical construction. These findings offer valuable technical references for the design and construction of similar large-diameter bored pile projects in thick sand layers.
Ye, Tao, Wang, Ruyi
Steel, Corrosion- and Heat-Resistant, Bars, Wire, Forgings, Forging and Ring Stock, Mechanical Tubing, and Rings, 12Cr (410 MOD), Ferrite Controlled, Annealed, Consumable Electrode MeltedAMS5611H (Current)9/10/2026
This specification covers a premium aircraft-quality, corrosion- and heat-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and stock for forging or flash-welded rings.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Bars, Forgings, Mechanical Tubing, and Forging Stock, 1.45Cr (0.93 - 1.05C) (SAE 52100), Aircraft Quality For Bearing ApplicationsAMS6440U (Current)9/10/2026
This specification covers a low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Steel Bars, Forgings, Mechanical Tubing and Forging Stock 1.75Cr - 4.0Ni - 0.5Mo - (0.35 - 0.40C) Premium Aircraft Quality Consumable Electrode Vacuum RemeltedAMS6551B (Current)9/10/2026
This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Steel Bars, Forgings, Mechanical Tubing and Forging Stock, 1.0Cr - 3.2Ni - 0.2Mo (0.12 - 0.17C) (ISO 14NiCrMo1304), Premium Aircraft-Quality, Double Vacuum MeltedAMS6549B (Current)9/10/2026
This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Steel, Corrosion-Resistant, Bars, Wire, Forging, and Forging Stock, 13Cr (0.30-0.40C) (420), AnnealedAMS5621J (Current)9/10/2026
This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, and forging stock.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Corrosion- and Heat-Resistant, Bars, Wire, Forgings, Mechanical Tubing, Rings, and Forging Stock, 18Cr - 10Ni - 0.40Ti (SAE 321), Solution Heat TreatedAMS5645U (Current)9/10/2026
This specification covers a corrosion- and heat-resistant steel in the form of forgings, wire, bars, mechanical tubing, flash-welded rings, and stock of any size for forging or flash-welded rings.
AMS F Corrosion and Heat Resistant Alloys Committee
BEARING, BALL, AIRFRAME, ANTIFRICTION, HEAVY DUTYAS27640F (Current)9/9/2026
ACBG Rolling Element Bearing Committee
Johnson-Cook Model Calibration of 10# Steel and Dynamic Mechanical Behavior Analysis under High Strain Rates2026-99-12019/4/2026
As a typical material for fragmentation warheads, the mechanical behavior and ballistic penetration performance of 10# steel are critical for assessing warhead lethality. To characterize the dynamic response of 10# steel, systematic experiments were conducted, including quasi-static tensile tests, split-Hopkinson tensile bar tests, and thermal softening measurements. A = 505.46 MPa, B = 292.84 MPa, n = 0.335, C = 0.0343, and m = 1.213 are the calibrated Johnson–Cook parameters. Bridgman-corrected notched tensile tests determined damage parameters D1 to D4: 0.065, 0.746, −0.646, and 0.031). A study of its constitutive behavior shows that the strength of 10# steel increases with stress triaxiality and strain rate, whereas increasing temperature enhances ductility and reduces strength. Finite element software was updated to include the calibrated parameters to develop a material model for ballistic impact simulation. When compared with the ballistic penetration test results obtained using a 14.5 mm projectile, the simulated residual velocities show less than 5% deviation from the measured values. 3D scanning reveals that fragment sizes in experimental data differ by under 10% from simulation predictions. This work enables precise numerical simulations for warhead fragmentation prediction and lightweight armor design.
Tian, Yumo, Zhang, Longhui, An, Fengjiang, Feng, Bo
Experimental Verification of Chatter Optimization for Deep Small Hole Micro-Boring Based on 05Cr17Ni4Cu4Nb2026-99-12739/4/2026
Aircraft engine parts are extremely precise, and for deep, small-hole machining of the stainless steel 05Cr17Ni4Cu4Nb valve seat, the quality and sealing of the parts machined with current machining parameters are poor. This greatly affects production efficiency and quality. This article takes the optimization of the three elements of cutting as the starting point, uses the orthogonal experimental method to study which force most affects machining quality in the three directions of boring force, and selects the appropriate three elements of cutting to reduce cutting force. And analyzed the simulated chip shapes before and after optimization, and finally verified the optimization effect through the instrument equipment. A micro three- axis accelerometer was used to conduct machining experiments on deep small holes with cutting parameters before and after optimization. After optimization of cutting parameters, the tool's maximum axial deformation showed a reduction of about 51.60%, a reduction of approximately 58.75% was achieved in the maximum radial deformation, the maximum tangential deformation exhibited a decline of about 45.17%, and the peak overall deformation was reduced by approximately 50.66%. Compared with the pre-optimized state, using optimized cutting parameters to machine deep small holes resulted in a 72.31% reduction in the tool's axial acceleration, the radial acceleration by 63.36%, and the tangential acceleration by 71.68%, the tangential force by 65.29%, the axial force by 27.93%, and the radial force by 31.16%. Effectively reducing tool chatter and lowering chatter amplitude led to the disappearance of surface vibration patterns on the machined parts.
Liu, Xinwei, Shi, Guangfeng, Zhou, Yuning, Gao, Jinglong
Control of Heat Treatment Deformation in Thin-Walled Pipe Fittings and Optimization of Turning Processes2026-99-13009/4/2026
A certain component features an overall thin-walled structure with a wall thickness less than 1 mm, manufactured from high-strength martensitic precipitation-hardening steel. This part demands extremely stringent dimensional accuracy, with circumferential wall thickness variation not exceeding 0.006 mm, making it a typical high- precision thin-walled component. To ensure component performance and material utilization, the primary forming processes include spin forming, solution heat treatment, and multiple turning operations. During actual machining, martensitic precipitation-hardening steel exhibits significant microstructural stress relaxation and uneven cooling after solution heat treatment, leading to substantial part deformation. This makes it difficult to control subsequent machining dimensions within tolerance limits. Additionally, conventional clamping methods during multi-pass turning operations often cause uneven stress distribution on components during processing, frequently resulting in dimensional deviations that severely impact finished product yield rates. To address this challenge, this study systematically developed specialized tooling design and optimized turning processes tailored to the structural characteristics and deformation mechanisms of these thin-walled tube blanks. Simultaneously, a gap-free turning fixture with uniform expansion and clamping capabilities was developed. Combined with optimized machining parameters during the turning stage, this significantly improved stress distribution during processing, preventing further deformation caused by localized stress concentration. Test results indicate that after process optimization, the overall machining accuracy of this component improved by approximately 70% compared to the original process. Critical geometric tolerances showed significant enhancement, with roundness error consistently controlled within 0.30 mm and diameter dimensional consistency markedly improved. These measures not only successfully addressed deformation control challenges during heat treatment and machining of thin-walled parts but also provided a viable process solution and technical reference for precision manufacturing of similar high- difficulty, high-precision components.
Kou, Yue, Zhao, Honglian
Multi-Scale Investigation of Burn-Through Mechanisms during In-Service Welding of Pipeline Steel2026-99-04098/28/2026
The core challenge of in-service welding repair of oil and gas pipelines is the risk control of burn-through. Current research primarily focuses on macroscopic phenomena, lacking a systematic multi-scale analysis of burn-through mechanisms and their dynamic evolution. Existing criteria are primarily based on qualitative experience, and widely accepted quantitative safety assessment standards have yet to be established. Furthermore, insufficient understanding of multi-scale damage failure mechanisms and weak theoretical foundations have become bottlenecks in this field. This study targets X65 pipeline steel and combines in-service welding experiments with in-situ scanning electron microscope tensile tests to elucidate the formation mechanism of burn-through from a multi- scale perspective. The results show that during in-service welding, the remaining wall thickness of the pipeline continuously decreases with the welding process, ultimately resulting in burn-through holes. On one hand, the welding arc drives the expansion of the hole; on the other hand, the internal pressure of the medium further enlarges the hole, leading to the expulsion of water and rapid pressure loss in the pipeline. Notably, the fusion zone behind the maximum melt depth is subject to high temperatures, which reduces strength and degrades plasticity, exhibiting significant plastic strain, making it a high-risk area for burn-through instability. Before instability occurs, this region shows evident grain coalescence, with plastic deformation primarily occurring through dislocation slip; when the difficulty of activating slip systems increases, twinning deformation may be induced, and large twin grains rarely develop cracks. Strain concentration and crack initiation are more likely to occur between grains with significant orientation differences.
Wang, Bangyu, Qiao, YingJie, Li, Dong, Xu, ShiHang
Steel, Corrosion- and Heat-Resistant, Seamless Tubing, 9.0Mn - 20Cr - 6.5Ni - 0.28N (21-6-9 LC), Solution Heat TreatedAMS5562G (Current)8/24/2026
This specification covers a corrosion- and heat-resistant steel in the form of seamless tubing.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Sheet, Strip, and Plate, 0.95Cr - 0.22V (0.48 - 0.53C) (SAE 6150) Aircraft QualityAMS6455N (Current)8/24/2026
This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.
AMS E Carbon and Low Alloy Steels Committee
Steel, Bars, Forgings, Mechanical Tubing and Forging Stock, 1.45Cr (0.93 - 1.05C) (SAE 52100), Premium Aircraft-Quality, Consumable Electrode Vacuum RemeltedAMS6444R (Current)8/24/2026
This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
AMS E Carbon and Low Alloy Steels Committee
Specifications for Low Carbon Cast Steel ShotJ2175_202608 (Current)8/19/2026
This SAE Recommended Practice describes chemical analysis, hardness, microstructure, and physical characteristic requirements for low carbon cast steel shot to be used for shot peening or blast cleaning operations.
Surface Enhancement Committee
Steel, Corrosion-Resistant, Sheet, Strip, and Plate, 17Cr (SAE 430), AnnealedAMS5503H (Current)8/18/2026
This specification covers a corrosion-resistant steel in the form of sheet, strip, and plate.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Corrosion- and Heat-Resistant, Forgings and Forging Stock, 12.5Cr (SAE 410), Enhanced Fracture Toughness, AnnealedAMS5867D (Current)8/17/2026
This specification covers a corrosion- and heat-resistant steel in the form of forgings and forging stock.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel Corrosion-Resistant Investment Castings, Vacuum Melted, Vacuum Cast, 13Cr - 8.0Ni - 2.2Mo - 1.1Al (PH 13-8 Mo), Homogenized, Solution, and Precipitation Heat Treated (Condition H1000)AMS5412C (Current)8/14/2026
This specification covers a corrosion-resistant steel in the form of investment castings.
AMS F Corrosion and Heat Resistant Alloys Committee
Reliability Calculation and Analysis of Influencing Factors for Girth Welds in High-Grade Steel Pipelines Based on HMC-SS2026-99-03428/14/2026
Fracture failure of girth welds in high-grade steel pipelines poses a critical threat to pipeline integrity. Leveraging enhanced digitalization in pipeline engineering, a statistical database has been developed to support reliability analysis based on actual operational data. This study utilizes real project data to analyze the failure probability and key influencing factors of girth welds containing crack defects, thereby providing theoretical support for safety design and risk management. To overcome the conservatism of traditional deterministic methods, a probabilistic reliability model was established, incorporating a modified PRCI-CRES ultimate tensile strain criterion. Addressing the inefficiency of standard Monte Carlo (MC) simulation in high-dimensional low-probability contexts, an efficient Hamiltonian Monte Carlo-Subset Simulation (HMC-SS) strategy was introduced. Results show that HMC-SS improves computational efficiency by 99.95% over MC, with only 0.90% relative error. Key findings include: crack depth has the strongest influence – variation from 0.92 mm to 3.68 mm, which increases failure probability by 103 times; the strength matching coefficient is dominant, and higher values reduce failure risk; strain demand exhibits a positive correlation with failure probability and couples with material properties. It is concluded that high- or equal-strength material matching should be emphasized in welding, and reliability-informed design should account for multi-parameter interactions to ensure global safety.
Yang, Kai, Wang, Kaihong, Wang, Bin, Shao, Jia, Yu, Weichao, Zhang, Dong
Finite Element Analysis of New Energy Vehicle Chassis Using ANSYS2026-99-03438/14/2026
Amid the rapid development of the new energy vehicle industry, the vehicle frame, as the core load-bearing component of the entire vehicle, plays a direct role in the vehicle’s safety, lightweight design, and power performance through its design and performance. Although research on new energy vehicle frames has matured, issues related to the lightweighting of drive shaft-associated structures and the balance between weight reduction and strength/stiffness still require in-depth exploration. This study focuses on the chassis of new energy vehicles, utilizing Q295 low-alloy high-strength steel. Based on the vehicle’s dimensions and mass parameters, a simplified 3D model was constructed using SolidWorks. Static analysis under bending and torsion conditions, along with a 6th-order modal analysis, was conducted using ANSYS software. Based on the analysis results, optimizations were implemented at both structural and material levels: structurally, the central crossbeam was widened, holes were opened on the crossbeam’s vertical plane to reduce weight, and the longitudinal beam welding process was optimized; materially, Q295 steel was retained in high-stress zones, while aluminum alloy replaced it in low-stress zones. The optimized frame achieved a 15% reduction in torsional stress, a 16% decrease in bending stress, a 2% reduction in torsional deformation, and a 3% decrease in bending deformation. Total mass decreased by 12.7 kg, with both strength and stiffness meeting design requirements. This approach synergistically enhances frame lightweighting and performance, providing technical support for optimizing the overall performance of new energy vehicles.
Guo, Lihong, Wang, Yiyou, Yang, Zihao
Steel, Corrosion-Resistant, Wire, 17Cr - 7.1NI - 1.1Al (17-7 PH®), Cold Drawn, Precipitation-HardenableAMS5678H (Current)8/10/2026
This specification covers a corrosion-resistant steel in the form of wire 0.007 to 0.625 inch (0.18 to 15.88 mm), inclusive, in nominal diameter, cold drawn to Condition C, and capable of being precipitation heat treated to Condition CH900.
AMS F Corrosion and Heat Resistant Alloys Committee
SCREW, MACHINE - STEEL, DIFFUSED NICKEL-CADMIUM PLATED, DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, UNS K14675, 195 KSI MIN, .1640-36 UNJF-3AAS9216D (Current)8/10/2026
E-25 General Standards for Aerospace and Propulsion Systems
BOLT, MACHINE - STEEL, DIFFUSED NICKEL-CADMIUM PLATED, DOUBLE HEXAGON EXTENDED WASHER HEAD, UNS K14675, 195 KSI MIN, .3125-24 UNJF-3AAS9210D (Current)8/10/2026
E-25 General Standards for Aerospace and Propulsion Systems
Research on the Cumulative Damage Mechanism of Special Equipment Steel Structures Based on Complex Load2026-99-10118/7/2026
Steel structures subjected to complex loading conditions undergo various types of damage, including fatigue, crack propagation, plastic deformation, and corrosion. As time and loads accumulate, these damages may lead to structural failure. The investigation of the damage mechanisms and constitutive models for special equipment steel structures under complex loading has been a significant challenge in engineering. This study develops a constitutive model for steel structure damage under static and dynamic loads, as well as vibration disturbances, through a normalization approach. The proposed model is validated via simulation to assess its feasibility. The findings offer a theoretical foundation for the design, life prediction, and health monitoring of steel structures in special equipment, aiming to enhance their safety and reliability. This research provides critical insights into damage analysis, failure prediction, and the optimization of repair strategies for steel structures, with significant practical implications in engineering applications.
Wang, Jun, Yu, Zhen, Huang, Yong-qiang, Chen, Wei-bi
Research on Corrosion and Friction Behaviors of 8Cr4Mo4V Bearing Steels in Corrosive Medium Environments2026-99-10068/7/2026
Corrosion-wear damage behavior affects the bearing life and reliability seriously in a corrosive environment. The accurate evaluation of the tribocorrosion behavior of 8Cr4Mo4V bearing steel samples is critical for the application and protection of bearings. The present work seeks to establish the relationship between laboratory salt spray accelerated experiments and the corrosion of 8Cr4Mo4V steel samples in real outdoor marine atmosphere exposure, and investigate the tribological behavior in the corrosion-wear process under artificial seawater. Results show that salt spray corrosion tests can well simulate the corrosion of 8Cr4Mo4V steels in marine atmospheric exposure. The tribocorrosion performance of 8Cr4Mo4V steels under artificial seawater conditions is affected by the temperature effect of the corrosive liquid and the working conditions. Increased normal load and reduced rotational speed can improve the anti-friction performance. This work offers the possibility and reference of precise control of corrosion-wear-coupled damage failures for bearings.
Zhao, Chao, Ying, Lixia, Nie, Chongyang, Zhu, Tianlin, Sun, Dong
Steel, Corrosion- and Heat-Resistant, Wire, 17Cr - 12Ni - 2.5Mo (SAE 316), Solution Heat TreatedAMS5690P (Current)8/5/2026
This specification covers a corrosion- and heat-resistant steel in the form of wire.
AMS F Corrosion and Heat Resistant Alloys Committee
Steel, Corrosion-Resistant, Bars, Wire, Forgings, Extrusions, Rings, and Forging Stock 5.0Mn - 22Cr - 12.5Ni - 2.2Mo - 0.20Cb - 0.30N - 0.20V (SAE XM-19), Solution Heat TreatedAMS5764G (Current)8/3/2026
This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, extrusions, flash-welded rings, and stock for forging, extruding, or flash-welded rings.
AMS F Corrosion and Heat Resistant Alloys Committee
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