17-4 PH(630) Stainless Steel

WLD Steel is a leading manufacturer, supplier and exporter of the precipitated hardening stainless steel 17-4 available in a number of different sizes and forms including bar, rod, plate and sheets. We mainly stock 17-4 in Annealing condition. 17-4 PH is a registered trademark form AK Steel Holding, that’s 630 precipitated hardenings Martensitic stainless steel with copper addition. It’s characterized by high strength, good corrosion resistance and cutting performance, a higher hardness is obtained through different This hardening treatment. Its tensile strength can reach up to 1100~1300MPa can be further strengthened through aging treatment, suitable for manufacturing parts with high acid corrosion resistance such as aircraft and gas turbines, nuclear reactors, paper mills, oil fields and chemical process parts. It not suggested being used at temperatures above 300°.

What’s the 17-4 PH stainless steel available forms and specifications at WLD Steel?

  • Sheet/Plate: ASTM A240, ASTM A480, ASTM A 693 / ASME SA 693
  • Round Bar: ASTM A276, ASTM A479,  ASTM A 564/ASME SA 564

17-4PH Steel Equivalent Grades

SS 630 S17400 SUS630 1.4548 X5CrNiCuNb16-4 0Cr17Ni4Cu4Nb

17-4PH Steel Chemical Composition

C Si Mn P S Cr Ni Cu Nb
≤0.07 ≤1.00 ≤1.00 ≤0.040 ≤0.030 15.00-17.00 3.0-5.0 3.0-5.0 0.15-0.45

17-4PH Steel Mechanical Properties

Heat treatment Tensile strength (MPa) Yield strength (MPa) Elongation,(%) Hardness, HBW
Hardening 480 ºC 1180 1310 10 ≤363
Hardening 550 ºC 1000 1070 12 ≥331
Hardening 580 ºC 865 1000 13 ≥302
Hardening 620 ºC 725 930 16 ≥277