UNS S41000 is a Martensitic Stainless Steel often utilised in valve bodies, bonnets, end and outlet connections and valve seat facings.
It is mainly utilised in standard or CO2 environments. Care must be exercised when exposed to sour environments containing H2S.
The grade is approved by NACE MR0175 subject to a maximum hardness requirement of 22 HRC and it being supplied in the hardened and double tempered condition.
| C | Si | Mn | P | S | Cr | Mo | Fe | |
|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | 11.50 | - | - |
| Max | 0.15 | 1.00 | 1.00 | 0.040 | 0.030 | 13.50 | - | - |
| Property | Value |
|---|---|
| U.T.S | 100 KSI Min (689 N/mm2) |
| 0.2% Proof Stress | 80 KSI Min (551 N/mm2) |
| Elongation | 15% |
| Red of Area | 40% |
| CVN Impacts @ -29°C (-20°F) | 27 Joules (20 ft-lbf) |