17-4PH
Stainless Steel17-4PH
Martensitic precipitation-hardening, high strength & corrosion resistance. (UNS S17400; equiv 17-4 PH / UNS S17400 / ASTM 630). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.07 |
|---|---|
| SI | 1 |
| MN | 1 |
| P | 0.04 |
| S | 0.03 |
| CR | 15 |
| NI | 3 |
| CU | 3 |
| NB | 0.15 |
Mechanical Properties
Tensile(H900):≥1310 MPa;Yield(H900):≥1170 MPa;Elong(H900):≥10%;Hardness(H900):≥44 HRC
Equivalent Standards
17-4 PH / ASTM 630
Equivalent Grades
UNS S17400 17-4PH / UNS S17400
Applications
马氏体沉淀硬化，强耐蚀。,"Bar
Available Forms
Forging"
Uses
Ferritic stainless steel with good resistance to stress-corrosion cracking and oxidation, plus formability and lower cost. Used for automotive trim, exhaust systems, domestic appliances, decorative and welded structures.
Heat Treatment
Annealed at 780–850 °C and air cooled; stabilize at 600–800 °C to avoid 475 °C embrittlement; not hardenable by heat treatment.
Precautions
Avoid welding in the 475 °C embrittlement and sigma-phase ranges; use matched filler and minimize heat input. Good resistance to stress-corrosion cracking.
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