I am currently trying to reproduce an old Westinghouse part from the 70's that was made using SAE 4130 steel, heat treated, w/ 42 HRC (per print). Now I'm learning from vendors that this SAE 4130 steel is hard to come by now a days and that S7 is a good replacement. This doesn't seem right, am...
European metals typically us codes such as +AT (solution annealed), +C, +1D in their standards such as EN 10088. When trying to find an equivilant material here in the USA, are using these codes considered the same here or is there another way that is more accepted here in the US?
Background...
