Aging steel 17-4PH, AISI 630, S17400
2026-08-09 08:09:23 Origin： Remark：0 Click：
17-4PH is normally used in mechanical engineering, shipbuilding, in the petrochemical industry and in the petroleum industry - aerospace, marine, paper, energy, offshore and food industries
17-4PH is one of the most popular and most commonly used stainless chromium-nickel alloy steels with copper additive, precipitation hardened with martensitic structure. It is characterized by high corrosion resistance while maintaining high strength properties, including hardness and retaining relatively good parameters. 17-4PH is widely used in manufacturing the high strength, anti-corrosive forge piece for planes, gas turbine and other machined parts.
RELATED MATERIAL SPECIFICATIONS
ASTM A693 / A705 / A564
AMS 5604 cold rolled sheet, strip
AMS 5643 round bar, flat bar, square bar, forgings
ASTM A564 type 630
ASTM A484 / ASME SA 484
ASTM A693 / ASME SA693 plate, sheet and steel strip
DIN EN 10088-2 type 1.4542 & X5CrNiCuNb16-4
AFNOR Z6CNU1704
TYPICAL CHEMICAL ELEMENTS (mass fraction - %)
Carbon, C (％): ≤ 0.07
Silicon, Si (％): ≤ 1.00
Manganese, Mn (％): ≤ 1.50
Phosphorus, P (％): ≤ 0.030
Sulfur, S (％): ≤ 0.015
Chromium, Cr (％): 15.0 ~ 16.0
Nickel, Ni (％): 3.00 ~ 5.00
Molybdenum, Mo (％): ≤ 0.60
Niobium, Nb (％): 0.15 ~ 0.35
Silicon, Si (％): ≤ 1.00
Manganese, Mn (％): ≤ 1.50
Phosphorus, P (％): ≤ 0.030
Sulfur, S (％): ≤ 0.015
Chromium, Cr (％): 15.0 ~ 16.0
Nickel, Ni (％): 3.00 ~ 5.00
Molybdenum, Mo (％): ≤ 0.60
Niobium, Nb (％): 0.15 ~ 0.35
Copper, Cu (%): 3.00 ~ 5.00
Iron, Fe (%): remainder.
TYPICAL MECHANICAL PROPERTIES
Condition of thermal treatment: +AT (solution treatment)
Hardness ≤ HBS: 360
Yield strength, σ0.2 ≥ MPa: -
Tensile strength, σb / MPa: ≤ 1200
Elongation δ5 ≥ (％): -
Elongation δ (transversal ) ≥ (％): -
Impact absorbing power Akv ≥ J : -
Yield strength, σ0.2 ≥ MPa: -
Tensile strength, σb / MPa: ≤ 1200
Elongation δ5 ≥ (％): -
Elongation δ (transversal ) ≥ (％): -
Impact absorbing power Akv ≥ J : -
Condition of thermal treatment: +P 930
Hardness ≤ HBW: -
Yield strength, σ0.2 ≥ MPa: 720
Tensile strength, σb / MPa: 930 ~ 1100
Elongation, δ5 ≥ (％): 16.0
Impact absorbing power Akv≥/J : 40
Hardness ≤ HBW: -
Yield strength, σ0.2 ≥ MPa: 720
Tensile strength, σb / MPa: 930 ~ 1100
Elongation, δ5 ≥ (％): 16.0
Impact absorbing power Akv≥/J : 40
Condition of thermal treatment: +P 960
Hardness ≤ HBW: -
Yield strength, σ0.2 ≥ MPa: 790
Tensile strength, σb / MPa: 960 ~ 1160
Elongation δ5 ≥ (％): 12.0
Impact absorbing power Akv ≥ J : -
Hardness ≤ HBW: -
Yield strength, σ0.2 ≥ MPa: 790
Tensile strength, σb / MPa: 960 ~ 1160
Elongation δ5 ≥ (％): 12.0
Impact absorbing power Akv ≥ J : -
TYPICAL APPLICATIONS
Due to its good resistance to corrosion, 17-4PH is normally used in mechanical engineering, shipbuilding, in the petrochemical industry and in the petroleum industry - aerospace, marine, paper, energy, offshore and food industries for heavy-duty machine components, bushings, turbine blades, couplings, screws, drive shafts, nuts, measuring devices, in manufacturing the high strength, anti-corrosive forge piece for planes, gas turbine and other machined parts.
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