Type 309S Stainless Steel are austenitic chromium-nickel stainless steels that provide excellent corrosion resistance and heat resistance plus good strength at room and elevated temperatures.
ASTM A240 309S Steel is identical to Type 309 except for a lower carbon content that minimizes carbide precipitation and improves weldability. They are essentially nonmagnetic as annealed and become lightly magnetic when cold worked.
ASTM A240 309S Chemical Composition:
Grade | The Element Max (%) | ||||||
C | Mn | P | S | Si | Cr | Ni | |
ASTM A240 309S | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 22.0-24.0 | 12.0-15.0 |
Mo | N | Cu |
ASTM A240 309S Mechanical Property:
Grade | Mechanical Property | ||||
Yield | Tensile | Elongation | Hardness, max | ||
ASTM A240 309S | Min Mpa | Mpa | Min % | Brinell | Rockwell B |
205 | 515 | 40% | 217 | 95 |
ASTM A240 309S Widely used in boilers, energy (nuclear power, thermal power, fuel cells), industrial furnaces, incinerators, heating furnaces, chemical, petrochemical and other important areas.
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