Home   Contact   +86 13774270557

Metallic material
Innovation | Professionalism
Integrity | Efficiency

440B Stainless Steel | Stainless Steel Supply

440B stainless steel is a type of martensitic stainless steel that is often used in various applications that require high hardness, toughness, and corrosion resistance.

440B stainless steel is also commonly used in the manufacture of bearings, valves, and other components that require excellent resistance to wear, fatigue, and corrosion.

Compared to SUS440A steel, 440B stainless steel has a higher hardness. On the other hand, 440B stainless steel has a higher toughness than SUS440C steel.

Chemical composition


Note: These values are approximate

Mechanical properties

Tensile strengthYield strengthElongationHardness
1310-1450 MPa1140-1240 MPa8-14%58-60 HRC

Note: These values are approximate

Physical properties


Density7.7 g/cm³
Thermal Expansion Coefficient10.4 x 10^-6 /K (20-100 °C)
Thermal Conductivity24 W/(m·K)
Specific Heat Capacity460 J/(kg·K)
Electrical Resistivity0.60 x 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!