05Cr17Ni4Cu4Nb — stainless Steel: Composition, Properties & Applications

Also known as: 05Cr17Ni4Cu4Nb
Martensitic precipitation-hardening, high strength & corrosion resistance. (GB/T 20878; equiv ASTM 630 / AMS 5643 / JIS SUS630 / GB 05Cr17Ni4Cu4Nb). Nominal values—confirm mill certificate.

CHEMICAL COMPOSITION
C:≤0.07;Si:≤1.00;Mn:≤1.00;P:≤0.040;S:≤0.030;Cr:15.0-17.5;Ni:3.0-5.0;Cu:3.0-5.0;Nb:0.15-0.45

MECHANICAL PROPERTIES
Tensile(H900):≥1310 MPa;Yield(H900):≥1170 MPa;Elong(H900):≥10%;Hardness(H900):≥44 HRC

TYPICAL APPLICATIONS
马氏体沉淀硬化，强耐蚀。,"Bar

AVAILABLE FORMS
Forging"

STANDARDS & EQUIVALENT GRADES
T 20878 05Cr17Ni4Cu4Nb; ASTM 630 / AMS 5643; JIS SUS630 / GB 05Cr17Ni4Cu4Nb

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.

PROCESSING 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.

SOURCE & SUPPLY
Shanxi Youte Steel stocks 05Cr17Ni4Cu4Nb in bars, plates, pipes and forgings with mill test certificates, cut-to-length service and export packaging. Contact our team for quotations and technical data sheets.