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AK Steel 17-7 PH® Precipitation Hardening Stainless Steel, Condition CH 900

Category Metal , Ferrous Metal , Martensitic , Stainless Steel , Precipitation Hardening Stainless
Manufacturer AK Steel
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF AK Steel 17-7 PH® Precipitation Hardening Stainless Steel, Condition CH 900.pdf
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Material Notes:
AK Steel 17-7 PH® provides high strength and hardness, excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment. This alloy provides valuable property combinations particularly well suited for aerospace applications. This special alloy also provides benefits for other applications requiring high strength and good corrosion resistance, as well as excellent properties for flat springs at temperatures up to 600°F (310°C). The material supplied from the mill is in Condition A. After fabrication, and conditioning treatments, the material is precipitation hardened into either Condition TH 1050 or Condition RH 950. To achieve the highest mechanical properties Condition A material is transformed to martensite at the mill by cold reduction to Condition C. After fabrication by the user a single low-temperature heat treatment is preformed to achieve condition CH 900.Information provided by AK Steel
Physical Properties Metric English Comments
Density 7.70 g/cc
0.278 lb/in³
Typical
Mechanical Properties Metric English Comments
Hardness, Rockwell C 49
49
Tensile Strength, Ultimate 1827 MPa
265000 psi
Tensile Strength, Yield 1793 MPa

@Strain 0.200 %
260100 psi

@Strain 0.200 %
Elongation at Break 2.0 %
2.0 %
in 2 inches
Modulus of Elasticity 200 GPa
29000 ksi
Component Elements Properties Metric English Comments
Aluminum, Al 0.75 - 1.5 %
0.75 - 1.5 %
Carbon, C <= 0.090 %
<= 0.090 %
Chromium, Cr 16 - 18 %
16 - 18 %
Iron, Fe 70.59 - 76.75 %
70.59 - 76.75 %
As Remainder
Manganese, Mn <= 1.0 %
<= 1.0 %
Nickel, Ni 6.5 - 7.75 %
6.5 - 7.75 %
Phosphorous, P <= 0.040 %
<= 0.040 %
Silicon, Si <= 1.0 %
<= 1.0 %
Sulfur, S <= 0.030 %
<= 0.030 %
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