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Dual-phase steel

Dual-phase steel (the Super Duplex Stainless Steel, referred to as SDSS), also known as Dual Phase Steel.

Martensitic or austenitic and ferritic matrix two-phase structure is consisting of steel. Generally ferritic and austenitic phase structure that composed of steel called duplex stainless steel, ferritic and martensitic phase structure that composed of steel called a dual-phase steel. The dual-phase steel is low carbon steel or high strength low alloy steel after the heat treatment or control the rolling of the critical region. A typical dual-phase steel yield strength σs 310MPa tensile strength σb is 655MPa. Duplex steel for the manufacture of cold punching, deep drawing and forming of complex components can also be used as a pipeline steel, chain, cold drawn steel wire, prestressed reinforced.

Nature: It is mainly composed of ferrite and martensite steel, which can be low-carbon steel or low alloy steel by the treatment or control rolling of the critical region. The type of steel has high strength and high ductility, good co-ordination. Now, it has become a high strength, good formability new stamping steel successful for the auto industry.

Through proper control of chemical composition and heat treatment process, both the advantages of ferritic stainless steel and austenitic stainless steel duplex stainless steel due to the characteristics of the two-phase structure, it austenitic stainless steel with excellent toughness and weldability and iron ferritic stainless steel with high strength and resistance to chloride stress corrosion combined with superior performance of duplex stainless steel welding of structural materials has developed rapidly since the 1980s has become a martensitic, Austria steel type's size and ferritic stainless steel side by side.

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