GB/T E2553-16
AWS A5.4 E2553-16 Description: AF2553-16 is a nitrogen-containing duplex stainless steel electrode with titanium-calcium coating. It can be used for both AC and DC with excellent operating performance. Because it contains molybdenum and nitrogen, and the carbon content is extremely low, the deposited metal has good crack resistance and corrosion resistance, especially stress corrosion resistance. Application: It is used for welding duplex stainless steel with a chromium content of about 25%, such as 022Cr25Ni7Mo4N, 03Cr25Ni6Mo3Cu2N, UNS 32550 (Alloy255), etc. Chemical composition of weld metal(%):| C | Mn | Si | Cr | Ni | Mo | Cu | N | S | P |
| ≤0.06 | 0.5 ~ 1.5 | ≤1.0 | 24.0 ~ 27.0 | 6.5 ~ 8.5 | 2.9 ~ 3.9 | 1.5 ~ 2.5 | 0.10 ~ 0.25 | ≤0.030 | ≤0.040 |
| Test item | Tensile strength Mpa | Elongation % |
| Guaranteed | ≥760 | ≥15 |
| Rod diameter （mm） | 2.5 | 3.2 | 4.0 | 5.0 |
| Welding Current （A） | 50 ~80 | 80 ~ 110 | 110 ~ 160 | 160 ~ 200 |