Stainless Steel 409 plate is a more cost-effective solution to carbon and Abrasion Resistant (AR) steel. Stainless Steel 409 plate is a nominal 11% chromium (Cr) stainless steel micro-alloyed with manganese (Mn), titanium (Ti) and nickel (Ni) that provides excellent toughness, weldability and fabricating characteristics.
ASTM A240 Stainless Steel 409 plate Chemical Composition
| Grade | C | Ni | Si | S | Mn | P | Cr | Ti | |
| SS 409 | min. | – | – | – | – | – | – | 10.5 | 6x C |
| max. | 0.08 | 0.5 | 1.00 | 0.045 | 1.00 | 0.045 | 11.75 | 0.75 |
Stress Relieving
Stress relief after welding is not usually required. Should this be necessary, temperatures between 200ºC and 300ºC are recommended for 60 minutes per 2.5mm.
Hot-working
Initial forging and pressing temperature range: 950ºC to 1050ºC Finishing temperature below 750ºC. Avoid extended holding times above 1000ºC as excessive grain growth takes place which reduces ductility. Note: All hot working operations should be followed by annealing and then pickling and passivation to restore the mechanical properties and corrosion resistance.
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