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steel weight change test coupon for MIL-PRF-372 testing

MIL-PRF-372 §4.3.1 Weight Change Test Coupons

Metal test coupons used in testing by military specification MIL-PRF-372 §4.3.1 (Allowable Weight Change). This test uses three metal coupons made of aluminum, steel, and copper. Each test coupon is 1" x 1" x 1/32". The test coupons are cleaned but not polished. Each test coupon is individually packaged and lot traceable to the original material.
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