SAE 4130

[AlotLeftToLearn]

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 I missing something?

 

[Metalfixer]

http://www.mcmaster.com/#grade-4130-steel/=tulhjd

I don't know what size you require, but it is available.

 

[TVP]

4130 in what product form (sheet, bar, forging, etc.) and what size? This is a very common grade for some sizes and product forms, but not for others.

 

[weldstan]

4130 is in high demand in the Oil & Gas industry. It may not be so highly available in very small quantities.

 

[tbuelna]

4130 that meets common commercial (ASTM & SAE) and aerospace (AMS) specs is readily available in bar, sheet, plate and tube forms. Smaller sizes (<1.00") of 4130 bar are usually only offered as CD aircraft quality material. Larger sizes (>2.00") of 4130 bar are usually offered as HF commercial or aircraft quality material. Aircraft quality 4130 bar is typically offered in annealed or normalized condition. If you require your 4130 raw material hardened to Rc42 you'll need to have your supplier heat treat the material prior to delivery.

One other thing it would be helpful to know is exactly what material form, size and specification did you use on your PO? You mentioned this material was for a Westinghouse legacy part. It is quite common for large OEMs to use their own specs when procuring raw materials. Are you trying to procure 4130 that must conform to a Westinghouse specification?