Supreme Steels

17-4PH Stainless Steel

Product Description:

17-4PH is a high-strength, corrosion-resistant, precipitation-hardening (PH) stainless steel that is commonly used in industries requiring superior mechanical properties, such as aerospace, chemical, and defense sectors. The “17-4” refers to the steel’s nominal composition, containing 17% chromium and 4% nickel. The “PH” designation indicates that the material undergoes a precipitation-hardening process to achieve its high strength. This process involves heat treatment to increase its hardness and tensile strength.

Features:

Specifications:

Composition of 17-4PH Stainless Steel:

Element Percentage
Chromium (Cr) 15.0 – 17.5%
Nickel (Ni) 3.0 – 5.0%
Copper (Cu) 3.0 – 5.0%
Iron (Fe) Balance
Manganese (Mn) 1.0% Max
Silicon (Si) 1.0% Max
Carbon (C) 0.07% Max
Phosphorus (P) 0.04% Max
Sulfur (S) 0.03% Max

Physical Properties:

Property Value
Density 7.75 g/cm³
Melting Point 1400–1450°C (2550–2640°F)
Hardness (Rockwell B) 95-100 HRC (age-hardened)
Tensile Strength 1000-1300 MPa (145,000-188,500 psi)
Yield Strength 850-1100 MPa (123,000-160,000 psi)
Elongation 10-15%
Modulus of Elasticity 200 GPa
Thermal Conductivity 24 W/m·K
Coefficient of Thermal Expansion 17.4 × 10⁻⁶ /°C