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Grade 17-4PH
Corresponding Standard SAE AMS 5643W-2021
Steel, Corrosion-Resistant, Bars, Wire, Forgings, Tubing, and Rings 16Cr - 4.0Ni - 0.30Cb - 4.0Cu Solution Heat Treated, Precipitation Hardenable
Classification Precipitation-Hardening Stainless Steel
Properties Corrosion Resistance Good Forgability Good Machinability
Density 7.8 g/cm3
17-4PH Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo More
Minimum Value - - - - - 15 3 3 - Nb:5C~0.45
Maximum Value 0.07 1 1 0.04 0.03 17.5 5 5 0.5
17-4PH Mechanical Properties
heat-treatment Tensile Strength
σb
Mpa 		Specified Plastic Yield Strength
Rp0.2
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
H900 (precipitation hardening) ≥1310 ≥1172 ≥10 ②
≥40		 HB: 388~444
HRC: 40~47
H925 (precipitation hardening) ≥1172 ≥1069 ≥10 ②
≥44		 HB: 375~429
HRC: 38~45
H1025 (precipitation hardening) ≥1069 ≥1000 ≥12 ≥45 HB: 331~401
HRC: 34~42
H1075 (precipitation hardening) ≥1000 ≥862 ≥13 ≥45 HB: 311~375
HRC: 31~38
H1100 (precipitation hardening) ≥965 ≥793 ≥14 ≥45 HB: 302~363
HRC: 30~37
H1150 (precipitation hardening) ≥931 ≥724 ≥16 ≥50 HB: 277~352
HRC: 28~37
Solution treatment (S) HB: ≤363
HRC: ≤39
17-4PH Corresponding Standards(Same grade name, different standards)
1 SAE J467b-1956(R1968)
17-4PH
2 SAE AMS 5643Q-2003
17-4PH
3 SAE AMS 5643W-2021
17-4PH

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