Stainless steel coil is an alloy steel with smooth surface, high
weldability, corrosion resistance, polishability, heat resistance,
corrosion resistance and other characteristics. It is widely used
in various industries and is an important material in modern
industry. Stainless steel is divided into austenitic stainless
steel, ferritic stainless steel, martensitic stainless steel, and
duplex stainless steel according to the structure state.
Austenitic Stainless Steel: stainless steel with an austenitic structure at room temperature.
Steel contains Cr≈18%, Ni≈8%-25% and C≈0.1%. Steel has high
toughness and plasticity, but low strength.
Martensitic Stainless Steel: A steel whose mechanical properties can be adjusted by heat
treatment. It has different strength and toughness at different
tempering temperatures.
Duplex Stainless Steel: Austenitic and ferrite each account for about half of the
structure. When the C content is low, the Cr content is 18% to 28%,
and the Ni content is 3% to 10%. Some steels also contain alloying
elements such as Mo, Cu, Si, Nb, Ti, and N. This type of steel has
the characteristics of austenitic and ferritic stainless steel
Ferritic Stainless Steel: It contains 15% to 30% chromium and has a body-centered cubic
crystal structure. This type of steel generally does not contain
nickel, and sometimes contains a small amount of Mo, Ti, Nb and
other elements. This type of steel has the characteristics of large
thermal conductivity, small expansion coefficient, good oxidation
resistance, and excellent stress corrosion resistance.
