Welding Wire or Rod Used to weld duplex stainless steel. The welds offer excellent resistance to stress corrosion, cracking and pitting. The microstructure of the weld metal consists of austenite and ferrite. Welding of duplex stainless steels calls for controlled welding parameters to achieve specified mechanical and corrosion resistant properties.
Chemical composition
| Chromium Cr 21.5- 23.5% | Nickel Ni 7.5-9.5% | Molybdenum Mo 2.5-3.5 | Manganese Mn 0.5-2.0% | Silicon Si Max 0.9% | Copper Cu 0.75% |
| Carbon C Max 0.03% | Nitrogen N Max 0.08-0.2% | Iron Fe Balance |
Mechanical properties
| Tensile Strength Rm (MPa) |
Yield Strength Rp0.2 (MPa) |
Elongation A % |
| min. 720 (104 psi) | 560 (81 psi) | 40 |
Product forms
| Product | Diameter (mm) | Length (mm) |
| Wire for MIG/GMAW Welding | 0.8, 1.0, 1.2, 1.6, 2.0, 2.4, 2.5, 3.2 | — |
| Rods for TIG/GTAW Welding | 2.0, 2.5, 3.2, 4.0, 5.0 | 915 – 1000 |
| Wire for SAW Welding | 2.0, 2.4, 3.2, 4.0, 5.0 | — |
| Electrode Core Wire | 2.0, 2.5, 3.20, 3.25, 4.0, 5.0 | 250, 300, 350, 400, 450, 500 |
Applications
Binary Nickel-Iron (Ni-Fe) and Ni based complex welding alloys are supplied in welding rod and wires in standard length or length up to the consumers’ request. For normal service conditions, the chemical compositions are available in various Ni contents according to the most of American and European standards.