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630 Stainless Steel | Stainless Steel Supply

630 stainless steel is also known as 17-4PH stainless steel, It is a precipitation hardening stainless steel.
630 stainless steel is extremely strong and tough, especially at high temperatures. It also has good corrosion resistance, especially in corrosive environments such as seawater. After proper heat treatment, 630 stainless steel can obtain a tensile strength as high as 1100MPa and a high yield strength.
Because 630 stainless steel has good mechanical properties and corrosion resistance, it is widely used in aviation, aerospace, petrochemical, pharmaceutical, food processing and other fields.

Chemical composition


Note: These values are approximate

Mechanical properties

Tensile strengthYield strengthElongationImpact toughness
1100-1350  MPa1000-1250 MPa8-15%50-60 J

Note: These values are approximate

Physical properties

Density7.8 g/cm³
Melting Point1398℃
Coefficient of Thermal Expansion11.7×10^-6/℃
Thermal Conductivity14.6 W/(m·K)
Specific Heat Capacity477 J/(kg·K)
Electrical Resistivity72 μΩ·cm

Note: These values are approximate

As a premium supplier of stainless steel, we offer a wide range of grades, sizes and finishes to suit your needs.
Size: according to customer requirements
Standards: GB, ASTM, EN, JIS, etc.
Austenitic type
Ferritic type
Martensitic type

Looking forward to your inquiry!