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SUS420F Stainless Steel | Stainless Steel Supply

SUS420F is a kind of stainless steel, also known as 420F stainless steel, which is a kind of martensitic stainless steel. It is a steel alloyed by elements such as chromium and molybdenum, which has high hardness and strength, and also has certain corrosion resistance.

SUS420F stainless steel is mainly used in the manufacture of knives, instruments, valves, bearings, pumps and pneumatic components. It has good processing performance, easy to cut and shape, and can be processed into various shapes. In addition, SUS420F stainless steel also has high magnetic permeability, which can be applied to the manufacture of electronic equipment and motors.

It should be noted that the welding performance of SUS420F stainless steel is poor, and appropriate welding processes and measures should be taken. In addition, it is not suitable for use in high temperature or strong corrosive environment.

Chemical composition


Note: These values are approximate

Mechanical properties

Tensile strengthYield strengthElongation
≥700 MPa≥460 MPa≥15%

Note: These values are approximate

Physical properties

Density7.7 g/cm³
Melting Point1450-1520℃
Coefficient of Thermal Expansion11.5 × 10^-6 / ℃
Thermal Conductivity24.9 W/(m·K)
Electrical Conductivity25.2 × 10^6 / (Ω·m)

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!