Equivalent to: GB/T 29713 309L AWS A5.9 ER309L BS EN ISO 14343-A-G 23 12 L
Characteristics and Applications
The weld metal is of the 22Cr-12Ni grade with an austenitic structure, featuring excellent crack resistance and weldability. It is suitable for welding low-carbon stainless steel, low-carbon cladded steel, 309S, heat-resistant 13Cr steel and dissimilar metals.
Precautions
1.The shielding gas to be used shall be 98%Ar + 2%CO₂ with a gas flow rate of 15–25 L/min.
2.A well-shielded, draft-free environment must be ensured at the welding site to prevent shielding gas dissipation and the occurrence of welding defects.
3.Oil stains, moisture and other contaminants on the welding area must be completely removed prior to welding.
4.For non-consumable electrode wire filling welding processes such as TIG, plasma arc and laser welding, the shielding gas shall be 99.99% pure argon.
Typical Chemical Composition of Welding Wire (wt%):
| C | Mn | Si | P | S | Cr | Ni | Mo |
Typical Value | ≤0.03 | 1.0-2.5 | 0.30-0.65 | ≤0.03 | ≤0.03 | 23.00-25.0 | 12.0-14.0 | ≤0.75 |
Standard Value | 0.026 | 1.61 | 0.46 | 0.021 | 0.006 | 23.72 | 12.86 | 0.09 |
