What material is 05cr17ni4cu4nb

05Cr17Ni4Cu4Nb national standard precipitation hardening stainless steel, 17-4PH (China’s old grade 0Cr17Ni4Cu4Nb, new grade 05Cr17Ni4Cu4Nb) round steel plate in stock Shanghai Lijia Special Steel Co., Ltd. Features and scope of use: Precipitation hardening steel with added copper.

Used for manufacturing shafts and steam turbine components.

Chemical composition: Carbon C: ≤0.07 Silicon Si: ≤1.00 Manganese Mn: ≤1.00 Sulfur S: ≤0.030 Phosphorus P: ≤0.035 Chromium Cr: 15.50～17.50 Nickel Ni: 3.00～5.00 Copper Cu: 3.00～5.00 Niobium Nb: 0.15

~0.45 Mechanical properties: Tensile strength σb (MPa): Aged at 480℃, ≥1310; Aged at 550℃, ≥1060; Aged at 580℃, ≥1000; Aged at 620℃, ≥930 Conditional yield strength σ0.2 (MPa):

Aging at 480℃, ≥1180; Aging at 550℃, ≥1000; Aging at 580℃, ≥865; Aging at 620℃, ≥725 Elongation δ5 (%): Aging at 480℃, ≥10; Aging at 550℃, ≥12; 580

Aging at ℃, ≥13; Aging at 620℃, ≥16 Sectional shrinkage ψ (%): Aging at 480℃, ≥40; Aging at 550℃, ≥45; Aging at 580℃, ≥45; Aging at 620℃, ≥50 Hardness: Solid

Dissolved, ≤363HB and ≤38HRC; Aged at 480℃, ≥375HB and ≥40HRC; Aged at 550℃, ≥331HB and ≥35HRC; Aged at 580℃, ≥302HB and ≥31HRC; Aged at 620℃, ≥277HB and ≥28HRC Heat treatment specifications and

Metallographic structure: Heat treatment specifications: 1) Solid solution at 1020~1060℃ for rapid cooling; 2) Aging at 480℃, after solid solution treatment, air cooling at 470~490℃; 3) Aging at 550℃, after solid solution treatment, at 540~

560℃ air cooling; 4) 580℃ aging, after solid solution treatment, 570~590℃ air cooling; 5) 620℃ aging, after solid solution treatment, 610~630℃ air cooling.

Metallographic structure: The structure is characterized by precipitation hardening.