GJB 0Cr17Ni4Cu4Nb round steel bar in stock supply GJB 0Cr17Ni4Cu4Nb round steel in stock, 0Cr17Ni4Cu4Nb round bar
0Cr17Ni4Cu4Nb is a precipitation-hardened, martensitic stainless steel composed of copper, niobium/tantalum. This grade boasts high strength, hardness (up to 300°C/572°F), and corrosion resistance. After heat treatment, the product's mechanical properties are further refined, achieving a pressure resistance of up to 1100-1300 MPa (160-190 ksi).
Overview
0Cr17Ni4Cu4Nb
0Cr17Ni4Cu4Nb is a precipitation-hardening, martensitic stainless steel.
This grade is not suitable for temperatures above 300°C (572°F) or extremely low temperatures; it exhibits excellent corrosion resistance to the atmosphere and diluted acids or salts, with corrosion resistance comparable to 304 and 430 grades.
Application Fields
· Offshore Platforms, Helicopter Decks, Other Platforms
Food Industry
Pulp and Paper Industry
Aerospace (Turbine Blade)
· Mechanical Components
Nuclear waste buckets
0Cr17Ni4Cu4Nb is a precipitation-hardened, quenching water, and martensitic stainless steel, with high strength, hardness, and corrosion resistance. After heat treatment, the product's mechanical properties are further enhanced, reaching a tensile strength of up to 1100-1300 MPa (160-190 ksi). This grade is not suitable for temperatures above 300°C (570°F) or extremely low temperatures. It offers excellent corrosion resistance to atmospheric conditions and diluted acids or salts, with the same corrosion resistance as grades 304 and 430.
Chemical Composition
c ≤0.07
Si ≤1.00
Mn ≤1.00
p ≤0.035
S ≤0.030
Ni 3.00-5.00
Cr15.5-17.5
MO -
Cu 3.00-5.00
Nb 0.15-0.45
Other -
Mechanical properties:
Tensile Strength σb (MPa): Aging at 480℃, ≥1310; Aging at 550℃, ≥1060; Aging at 580℃, ≥1000; Aging at 620℃, ≥930
Condition Yield Strength σ0.2 (MPa): Aging at 480°C, ≥1180; Aging at 550°C, ≥1000; Aging at 580°C, ≥865; Aging at 620°C, ≥725
Tensile elongation δ5 (%): 480°C aging, ≥10; 550°C aging, ≥12; 580°C aging, ≥13; 620°C aging, ≥16
Section shrinkage rate ψ (%): Aging at 480°C, ≥40; Aging at 550°C, ≥45; Aging at 580°C, ≥45; Aging at 620°C, ≥50
Hardness: Solution treated, ≤363HB and ≤38HRC; Age hardened at 480°C, ≥375HB and ≥40HRC; Age hardened at 550°C, ≥331HB and ≥35HRC; Age hardened at 580°C, ≥302HB and ≥31HRC; Age hardened at 620°C, ≥277HB and ≥28HRC.
Heat Treatment Process
Heat treatment specifications and metallographic structure:
Heat Treatment Specifications: 1) Solution treated at 1020-1060℃ followed by rapid quenching; 2) Ageing at 480℃ after solution treatment, then air-cooled at 470-490℃; 3) Ageing at 550℃ after solution treatment, then air-cooled at 540-560℃; 4) Ageing at 580℃ after solution treatment, then air-cooled at 570-590℃; 5) Ageing at 620℃ after solution treatment, then air-cooled at 610-630℃.
Metallographic Structure: Characterized by precipitation hardening.
Delivery Condition: Generally delivered after heat treatment, with the specific type noted in the contract; if not specified, delivered in non-heat treated condition.
