RW 312 is a stainless steel for welding used to join dissimilar metals, including carbon steel to stainless steel. Its high-ferrite weld metal improves hot-cracking resistance. It helps preserve a dual-phase microstructure under high nickel dilution. It is unsuitable above 300 °C or for components requiring post-weld heat treatment.
| Product | Nominal Composition | EN ISO 14343-B: 2017 | AWS A5.9-2017 Alloy Designation |
DIN Werkstoff Nr. |
|---|---|---|---|---|
| RW 312 | 29 9 | SS312 | ER312 | 1.4337 |
| Element | RW 312 |
|---|---|
| C | ≤ 0,15 % |
| Mn | 1,00-2,50 % |
| Si | 0,30-0,65 % |
| S | ≤ 0,020 % |
| P | ≤ 0,030 % |
| Cr | 28,0-32,0 % |
| Ni | 8,0-10,5 % |
| Mo | ≤ 0,30 % |
| Cu | ≤ 0,30 % |
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