F55
Stainless SteelF55
Super-duplex, corrosion resistant & high strength. (ASTM A182 F55; equiv ASTM A182 F55 (Zeron 100)). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.04 |
|---|---|
| CR | 24 |
| NI | 4.5 |
| MO | 2.9 |
| N | 0.1 |
| CU | 1 |
Mechanical Properties
Tensile:≥760 MPa;Yield:≥550 MPa
Chinese Standard
ASTM A182 F55 F55
Equivalent Standards
ASTM A182 F55 (Zeron 100)
Equivalent Grades
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.
Applications
超级双相，耐蚀高强。,"Plate
Available Forms
Bar
Uses
Tube"
Heat Treatment
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.
Precautions
Solution anneal 1020–1100 °C and rapid quench; reheating near 300–400 °C (sigma phase) and 475 °C embrittlement zones must be avoided.
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