5643
Stainless Steel5643
Martensitic precipitation-hardening, high strength & corrosion resistance. (AMS; equiv ASTM 630 / AMS 5643 / JIS SUS630 / GB 05Cr17Ni4Cu4Nb). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.07 |
|---|---|
| CR | 15 |
| NI | 3 |
| CU | 3 |
| NB | 0.15 |
Mechanical Properties
Tensile (H900):≥1310 MPa;Yield:≥1170 MPa;Elong:≥10%
Chinese Standard
AMS 5643
Equivalent Standards
ASTM 630 / AMS 5643
Equivalent Grades
JIS SUS630 / GB 05Cr17Ni4Cu4Nb
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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