S32750
Stainless SteelS32750
6Mo super-austenitic, exceptional pitting resistance. (UNS; equiv UNS S31254 / EN 1.4547). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.03 |
|---|---|
| SI | 0.8 |
| MN | 1.2 |
| P | 0.035 |
| S | 0.02 |
| CR | 24 |
| NI | 6 |
| MO | 3 |
| N | 0.24 |
Mechanical Properties
Tensile:≥795 MPa;Yield:≥550 MPa;Elong:≥15%;Hardness:≤310 HB
Equivalent Grades
UNS S32750 / UNS S31254 / EN 1.4547
Applications
6Mo超级奥氏体，极强耐点蚀。,"Plate
Available Forms
Tube"
Uses
Duplex stainless steel with a mixed austenite/ferrite structure giving roughly twice the yield strength of austenitic grades plus excellent chloride resistance. Used in desalination, offshore, pulp & paper, heat exchangers and chemical tankage.
Heat Treatment
Solution anneal 1020–1100 °C and rapid quench; reheating near 300–400 °C (sigma phase) and 475 °C embrittlement zones must be avoided.
Precautions
Heat input and interpass must be controlled to keep the ferrite/austenite balance; avoid exposure 300–400 °C (sigma) and use low carbon. Sensitive to chloride SCC above ≈60 °C.
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