4140 vs 4340
4140 vs 4340
(OP)
we are looking for alternatives for a 4340 shaft material and are exploring using 4140. The final shaft will be inductioned hardened to Rc52-55 with a core hardness of 33-38 if we keep the same specs. Any thoughts?





RE: 4140 vs 4340
RE: 4140 vs 4340
RE: 4140 vs 4340
Keep in mind that 4340 alloy steel provides excellent toughness and increased fatigue strength in addition to increased hardenability in comparison to 4140 alloy steel. These also need to be factored into your material substitution.
RE: 4140 vs 4340
4140 should be perfectly adequate for this application.
RE: 4140 vs 4340