ER3A21 Aluminium Welding Wire | MIG and TIG Welding Wire

Welding Consumables

ER 3A21 Aluminium Welding Wire

Aluminium-manganese filler metal for MIG and TIG welding of aluminium-manganese alloys

Standard: GB/T3190-2020

Request a Quote

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.

Why Choose Us

In-Depth Experience
1. We’ve specialized in aluminium and titanium welding wire for over 35 years.
2. Our manufacturing facility includes 6 processing workshops, over 60 production machines, and more than 50 production lines.
3. We’ve supplied products and services to over 5,000 clients in 15 countries.
Premium Quality
1. We are certified by ISO9001:2015 and GJB9001C-2017.
2. The welding wires we offer are approved by CE, DB (German Railway), CCS (China Classification Society), VdTÜV (Germany), and SGS.
3. A CNAS-accredited lab provides technical support and welding process evaluation.
On Time Delivery
1. Customized packaging option are available with delivery lead times between 3 to 15 days
2. We keep 280 tons of finished inventory and have an annual production capacity of 3,000 tons.
3. Our technical team offers free welding consultations, tailored solutions, and 24-hour after-sales service.