Active Standard: A370 - 12a
A370 and E23 use the same drawing for the striking edge of Charpy impact test machine. The current tolerance of the corner radius (0.25 mm) of the striker edge is +/- 0.05 mm. Because the tested steel products have shown high ductility, the issue of wear has come to the surface. To comply with the current tolerance, it is necessary to check and/or change the striker frequently. On the other hand, it was shown that the tolerance of corner radius has little effect on test results. See ASTM STP 1248. Based on this information, ASTM E23 was revised in 2012 to give the corner radius as 0.25 mm, - 0.05 mm, + 0.50 mm. See E23-12c. This revision will make the same change in A370.
Keywordsbend test; Brinell hardness; Charpy impact test; elongation; FATT (Fracture Appearance Transition Temperature); hardness test; portable hardness; reduction of area; Rockwell hardness; tensile strength; tension test; yield strength;
Ballot Item Approved as A370-2013 and Pending Publication