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A New High Strength CAB Evaporator Plate Alloy with High Corrosion Resistance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 10, 2005 by SAE International in United States
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A new evaporator plate alloy identified as FA7857 has been developed by Sapa. This alloy which is intended for CAB brazing, has been developed to meet the market needs for a material with good formability prior to brazing and a low susceptibility to filler liquid core penetration (sometimes termed LFM) during brazing. The excellent formability in the annealed condition, with an elongation of 26% and an Erichsen cup height of 9.2mm, makes this material highly suitable for pre-stretching prior to evaporator plate forming and brazing. An appropriate pre-stretch is 5% which eliminates the risk of LFM, while improving the uniformity of flow of the filler metal and the final corrosion performance. In SWAAT corrosion tests, brazed samples of the two-side clad sheet remained unperforated after 42 days of testing. These excellent corrosion properties combined with a material yield strength of 53MPa in the post-brazed condition will contribute to the production of a more durable, lighter weight evaporator.
CitationMelander, M., Oskarsson, A., Moberg, A., Wass, S. et al., "A New High Strength CAB Evaporator Plate Alloy with High Corrosion Resistance," SAE Technical Paper 2005-01-2036, 2005, https://doi.org/10.4271/2005-01-2036.
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