多謝幫忙,我從網上找到關於STRESSPROOF的介紹,對照了ASTM A311和STRESSPROOF的介紹,我覺得ASTM 1144是易切削鋼,但STRESSPROOF是在它的增強型產品,無額外熱處理時可以達到RC23~30的範圍。
但我還是不知道STRESSPROOF的熱處理是否就是使用induction hardened (感應淬火),還是有其他方式。
STRESSPROOF的介紹
STRESSPROOF® is made by a patented process which consists of drawing the bar through a special die under heavy draft, then stress relieving it. This severe cold working combined with the stress relieving results in a high strength bar with stability and exceptional machinability. STRESSPROOF® can often replace heat treated alloy steel for machined parts requiring hardness in the range 23-30 HRC. It can be induction hardened but should be watched for quench cracks because of the high sulfur and manganese content. Welding is not recommended. STRESSPROOF® exceeds ASTM A311, Class B.