"metengr (Materials) 29 Jul 05 22:12
The problem that I see has nothing to do with what the foundry supplied. It has more to do with you not having specified a cast 4140 alloy steel in accordance with a Standard Specification, like ASTM A 915 titled 'Steel Castings, Carbon, and Alloy, Chemical...
I am working with a casting that requires yield strength of ~850 mpa with elongation >16%. I suggested that the foundry use 4130-4140 alloy. They used an alloy like 4130, but with elevated Mn and with a small amount of Ni. Please see chart.
I would appreciate if anyone could share their...