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

• Board
• Stick
• Pipe
• Forging

Title

17‑4PH Board

Size

0.5mm – 100mm

Length

1000mm – 6000mm (customizable)

Production

Hot rolled + Annealed

Surface

Pickled / 2B / Polished

Processing

Hot rolled + Annealed

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

Title

17‑4PH Stick

Size

8mm – 300mm

Length

1000mm – 6000mm (customizable)

Production

Hot rolled + Annealed

Surface

Black / Peeled / Polished

Processing

Hot rolled + Annealed

Standard

• USA
• ASTM A564 / ASME SA564
• China
• GB/T 1220‑2021、GB/T 4356‑2021

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

Title

17‑4PH Pipe

Size

6mm – 500mm OD, 1mm – 50mm WT

Length

1000mm – 12000mm (customizable)

Production

Hot finished + Annealed / Cold drawn + Annealed

Surface

Pickled / Bright annealed / Polished

Processing

Hot finished + Annealed / Cold drawn + Annealed

Standard

• USA
• ASTM A312 / ASME SA312
• China
• GB/T 12771‑2020、GB/T 14976‑2012

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

Title

17‑4PH Forging

Size

Custom size available

Length

Custom size available

Production

Forged + Annealed

Surface

Rough forged / Machined / Polished

Processing

Forged + Annealed

Standard

• USA
• ASTM A182 / ASME SA182
• China
• GB/T 4238‑2022、GB/T 10088‑2018

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