Grade 17-7 PH Stainless Steel Physical Properties
Grade 17-7 PH is a precipitation hardening stainless steel. It provides high strength and hardness and a moderate level of corrosion resistance up to 600˚F.
Grade 17-7 PH is a chromium-nickel-aluminum precipitation hardening stainless steel. Grade 17-7 PH stainless steel plates have high strength and hardness, excellent fatigue properties, good corrosion resistance, good formability, and minimum distortion upon heat treatment. This grade can be easily formed in the austenitic condition similar to Type 301 stainless steel and hardened to high strength levels using relatively low heat treatments that minimize distortion. Grade 17-7 PH stainless steel plate is available in 2B, 2D, Bright Annealed (BA), Polished, and 8K mirror surface finish.
Chemical Composition (by Weight %):
Carbon: 0.09 max.
Chromium: 16.0-18.0
Nickel: 6.5-7.7
Manganese: 1.00 max.
Silicon: 1.00 max.
Aluminum: 0.75-1.50
Phosphorus: 0.040 max.
Sulfur: 0.030 max.
Density, lb/in3: 0.282
Modulus of Elasticity, psi: 29 x 10⁶
Coefficient of Thermal Expansion, 68-212˚F, /˚F: 8.5 x 10⁻⁶
Thermal Conductivity, Btu/ft hr ˚F: 9.5
Specific Heat, Btu/lb ˚F 0.11
Formability
In Condition A, Alloy 17-7 PH can be formed comparably to Type 301. It work hardens rapidly and may require intermediate annealing in deep drawing or in forming intricate parts. Spring-back is similar to that of Type 301. Alloy 17-7 PH is extremely hard and strong in Condition C. Therefore, fabrication techniques for such materials must be used.
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