ASTM G202 Test Coupons
Metal coupons used in testing by ASTM G202 (Using Atmospheric Pressure Rotating Cage). Each coupon is 19mm x 75mm x 3mm. The coupons are deburred and polished to 150 grit. The test apparatus uses eight test coupons at a time. The coupons are made from the same base metal as the service components being evaluated.