Stainless Steel 309 is a highly alloyed austenitic steel used for its outstanding oxidation resistance, high-temperature strength and creep resistance. The lower nickel content of SS 309 Plates improves resistance to sulfur attack at high temperatures. SS 309 Sheets are tough and ductile and can be readily fabricated and machined. It can be then quenched rapidly. Post-work annealing can be done to restore its corrosion resistance property.
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 |
Mo | N | Cu |
Type 309 has the same machining properties as Type 304, and can be roll formed, stamped, and drawn easily.
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