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440A Stainless Steel | Stainless Steel Supply

440A stainless steel is a martensitic stainless steel that is known for its high chromium content, which gives it excellent corrosion resistance in harsh environments. It is often used in the manufacture of bearing parts that are exposed to corrosive environments and do not require lubrication.

In addition to its excellent corrosion resistance and hardness, 440A stainless steel also has good high-temperature dimensional stability. This means that it can maintain its shape and size even when exposed to high temperatures, which makes it suitable for use in high-temperature applications such as furnace parts and cutting tools.

Chemical composition


Note: These values are approximate

Mechanical properties

Tensile strengthYield strengthElongationHardness
760-1310 MPa590-1140 MPa10-25%55-57 HRC

Note: These values are approximate

Physical properties

Density7.75 g/cm³
Melting Point1371-1508 ℃
Coefficient of Thermal Expansion10.4 × 10^-6/K
Thermal Conductivity24.2 W/mK
Specific Heat Capacity (0-100℃)0.16 J/(g·K)
MagnetismCan be magnetized

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!