Comparison
42CrMo4 vs 42CrMoS4
42CrMo4 and 42CrMoS4 are sisters in the Cr-Mo family. The S variant has raised sulphur for better machining. The W.Nr. differs: 1.7225 versus 1.7227. AISI 4140 is cross-referenced to both – the certificate decides which one you have received.
When S
42CrMoS4 is chosen when turning and drilling dominate and the drawing permits the higher sulphur. For critical dynamic loads, many drawings stay with 42CrMo4 without S.
- 42CrMo4 – 1.7225 – standard Q&T
- 42CrMoS4 – 1.7227 – improved machinability
- Both may be cross-referenced to AISI 4140 – still two certificates
Purchasing
Write the W.Nr. the drawing requires. We do not supply 1.7227 as 1.7225 on paper.
Frequently asked questions
- Is 42CrMoS4 also 4140?
- Same family and often the same AISI cross-reference, but the W.Nr. is 1.7227. It is a different specification from 1.7225.
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Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.