17-4PH is a martensitic precipitation hardening stainless steel with high strength, high hardness and moderate corrosion resistance. It achieves excellent mechanical properties through aging heat treatment, featuring good toughness, wear resistance and outstanding dimensional stability. This alloy combines the advantages of stainless steel and high-strength structural steel, suitable for mechanical parts, valve components, aerospace fittings and chemical equipment parts.

Advantage

1.High tensile strength and hardness after precipitation hardening treatment 2.Good general corrosion resistance, better than ordinary martensitic stainless steel 3.Excellent mechanical toughness, wear resistance and fatigue performance 4.Easy machining and heat treatment, stable comprehensive performance

Ingredient

• Cr
• 15.00 ~ 17.50
• Ni
• 3.00 ~ 5.00
• Cu
• 3.00 ~ 5.00
• Nb
• 0.15 ~ 0.45
• C
• ≤0.07
• Mn
• ≤1.00
• Si
• ≤1.00
• P
• ≤0.040
• S
• ≤0.030
• Fe
• Balance

Standard

• USA
• ASTM A693 / ASME SA693
• China
• GB/T 4237‑2017、GB/T 20878‑2020

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥1070 MPa
• ≥895 MPa
• ≥12 %
• ≥40 %
• ≤363 HBW
• ≥20 J
• Annealed
• ≥1000 MPa
• ≥825 MPa
• ≥12 %
• ≥40 %
• ≤363 HBW
• ≥20 J

• STATE
• Annealed
• RP
• ≥1070 MPa
• YIELD
• ≥895 MPa
• EXTEND
• ≥12 %
• SHRINK
• ≥40 %
• HARDNESS
• ≤363 HBW
• IMPACT
• ≥20 J
• STATE
• Annealed
• RP
• ≥1000 MPa
• YIELD
• ≥825 MPa
• EXTEND
• ≥12 %
• SHRINK
• ≥40 %
• HARDNESS
• ≤363 HBW
• IMPACT
• ≥20 J