24 July 2021 300 Series Stainless Steel
309 Stainless Steel Bar
Types 309 and 309S are austenitic chromium-nickel stainless steels that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures. Type 309S is identical to Type 309 except for a lower carbon content that minimizes carbide precipitation and improves weldability. They are essentially non-magnetic as annealed and become slightly magnetic when cold worked.
Typical uses include furnace parts, heating elements, aircraft and jet engine parts, heat exchangers, carburizing-annealing boxes, sulfite liquor handling equipment, kiln liners, boiler baffles, refinery and chemical processing equipment, and auto exhaust parts.
309 stainless steel can withstand repeated heating below 980 ℃, and has high high temperature strength, oxidation resistance and carburization resistance. It is widely used in boilers, energy (nuclear power, thermal power, fuel cells), industrial furnaces, incinerators, heating furnaces, chemical, petrochemical and other important fields.
Chemical Composition:
C≤0.08
Mn≤2.00
Si≤1.00
P≤0.045
S≤0.030
Ni≤12.0-15.0
Cr≤22.0-24.0
Mechanical Properties:
Yield strength/MPa: ≥ 205
Tensile strength/MPa: ≥515
Elongation/%: ≥ 40
Reduction of area/%: ≥50