Welding Consumables
Aluminium-manganese filler metal for MIG and TIG welding of aluminium-manganese alloys
- Standard: GB/T3190-2020
ER 3A21 Aluminium Welding Wire
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Chemical Composition (%)
| Si | Fe | Cu | Mn | Mg | Zn | Ti | Al | Others | |
| Each | Total | ||||||||
| ≤0.60 | ≤0.70 | ≤0.20 | 1.0-1.6 | ≤0.05 | ≤0.10 | ≤0.15 | Rest | ≤0.05 | ≤0.10 |
Features
- Designed for welding aluminium-manganese alloys, offering slightly higher strength than pure aluminium
- Cannot be strengthened through heat treatment, but cold working improves mechanical properties effectively
- High plasticity in annealed condition, good corrosion resistance, and excellent weldability make it a versatile option for general fabrication
Available Sizes
- Welding wire: 0.8/1.0/1.2/1.6/2.0/2.4/3.0/3.2/4.0/5.0/6.0mm
- Spool: D300 (9kg), D270 (7kg), D200 (2kg), D100 (0.5kg)
Applications
- Ideal for welding parts that operate in liquid or gas environments and require high plasticity and good weldability
- Commonly used for fuel tanks, gasoline or lubrication pipes, and a variety of liquid containers
- Also suitable for deep-drawn components and other low-stress parts that benefit from corrosion resistance and formability
Packaging
- MIG wire diameter: 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm
- Package: D300 (9kg/spool), D270 (7kg/spool)
- MIG wire diameter: 1.2mm, 1.6mm
- Package: drum D660 (100kg/drum)
- TIG wire diameter: 2.0mm, 2.4mm, 3.0mm, 3.2mm, 4.0mm, 5.0mm, 6.0mm
- Package: 1000mm length (10kg/box)
- TIG wire diameter: 1.6mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm, 4.0mm, 5.0mm, 6.0mm
- Coil inner diameter: D450mm, D300mm
- Package: 10-17kg/coil
Recommended Welding Method
Performs well with both MIG and TIG welding, especially when using AC TIG with pure argon as shielding gas. To avoid porosity or weak joints, make sure the workpiece and filler are free from moisture or surface contaminants before starting.
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