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SUS420J1 Stainless Steel | Stainless Steel Supply

SUS420J1 is a kind of stainless steel, which is a kind of martensitic stainless steel. It is a stainless steel grade specified by the Japanese Industrial Standard (JIS).
Due to its high hardness, wear resistance and corrosion resistance, SUS420J1 is widely used in the manufacture of high-strength, high-hardness parts.It is often used in the production of knives, industrial blades, injection molds, medical equipment and other fields.
It should be noted that although SUS420J1 is stainless steel, its corrosion resistance is not as good as that of steel such as AISI 304 or 316L. Therefore, it is necessary to avoid prolonged exposure to wet or corrosive environments during use.

Chemical composition


Note: These values are approximate

Mechanical properties

Tensile strengthYield strengthElongation
≥685 MPa≥490 MPa≥15%

Note: These values are approximate

Physical properties

Density7.75 g/cm³
Melting Point1450°C
Thermal Conductivity24.9 W/(m·K)
Thermal Expansion10.4 x 10⁶ / °C
Specific Heat Capacity460 J/(kg·K)
Electrical Conductivity2.2 x 10⁶ S

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

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