AWS Class ER 4047 MIG & TIG
ER4047 TIG Filler Rod & MIG Wire Supplier in India
Nicorex Alloys is an ISO 9001- and ISO 14001-certified supplier and importer of ER4047 aluminium TIG filler rods and MIG welding wire base in Mumbai, India. We stock ER4047 in TIG rod and MIG spool classified under AWS A5.10 / SFA-5.10 with UNS designation A94047.
ER4047 aluminium filler wire (also called 4047 or AlSi12 TIG rod) is a near‑eutectic aluminium‑silicon alloy designed for high‑quality welding and brazing. It contains 11-13% silicon (UNS A94047), giving it one of the lowest melting points among common aluminium filler metals, about 573°C. The high silicon content provides an extremely fluid weld pool with excellent wetting, very low shrinkage on solidification, and strong resistance to hot cracking. Typical weld metal tensile strength is about 170 MPa (25 ksi), and fillet weld shear strength is around 131 MPa (19 ksi). ER4047 is suitable for welding 6XXX, 3XXX, 1XXX, and cast Al‑Si alloys (such as 356 and A356) using GTAW (AC) or GMAW (DCEP, 100% argon). It is also classified as a brazing alloy (BAlSi‑4 per AWS A5.8), making it an excellent choice for furnace brazing of aluminium heat exchangers, radiators, and HVAC components where good flow and leak‑tight joints are critical.
Every ER4047 coil and rod from Nicorex Alloys includes EN 10204 3.1B mill test certificates with full heat-lot traceability. We supply aluminium welding consumables across India and export markets for automotive, heat exchanger fabrication, cast aluminium repair, food processing and general structural welding applications.
ER4047 Welding Wire Specifications
The table below shows the specification details of ER4047 aluminium TIG rods and MIG wire.
| AWS Classification | ER4047 / R4047 per AWS A5.10 |
|---|---|
| UNS Number | A94047 |
| Welding Processes | GTAW, GMAW, OFW, Brazing |
| Polarity | (TIG): AC (MIG): DCEP |
| Shielding Gas | 100% Argon |
| TIG Rod Diameters | 1.6, 2.4, 3.2 mm |
| MIG Wire Diameters | 0.8, 1.0, 1.2 mm |
| Welding Positions | All |
AWS Classification Explained: What Does ER4047 Mean?
This table explains the AWS code ER4047 and what each part means in the aluminium-silicon alloy system.
| Designator | Meaning |
|---|---|
| E | Electrode (suitable for GMAW) |
| R | Rod (suitable for GTAW and OFW) |
| 4XXX | Al-Si alloy series |
| 047 | Specific alloy: 11.0–13.0% Si |
ER4043 has only 4.5-6% silicon and solidifies over a wider temperature range. ER4047, with about 12% silicon, solidifies in a very narrow range, giving excellent flow and the lowest shrinkage of common aluminium fillers.
Chemical Composition of ER4047 per AWS A5.10
This table lists the chemical composition of ER4047 welding wire as defined in AWS A5.10, including each element and its allowed range.
| Specification | Silicon (Si) | Iron (Fe) | Copper (Cu) | Manganese (Mn) | Magnesium (Mg) | Zinc (Zn) | Beryllium (Be) | Aluminium (Al) |
|---|---|---|---|---|---|---|---|---|
| AWS A5.10 Req. (%) | 11.0–13.0 | 0.80 max | 0.30 max | 0.15 max | 0.10 max | 0.20 max | 0.0003 max | Balance |
ER4047 contains 11-13% silicon, over twice that of ER4043. This high silicon level lowers the melting point to about 573°C and greatly reduces shrinkage and porosity in the weld.
Mechanical Properties of ER4047 Weld Deposits
The following table presents typical mechanical properties of ER4047 weld deposits, including strength values and post-anodising characteristics for aluminium applications.
| Specification | Tensile Strength | Fillet Weld Shear Strength | Post-Anodising Colour |
|---|---|---|---|
| Typical Value | ~170 MPa (25 ksi) | ~131 MPa (19 ksi) | Dark grey to black |
ER4047 fillet welds have higher shear strength than ER4043, which helps in automotive and structural joints, but their eutectic silicon structure makes them less ductile than ER5356.
Base Metal Compatibility for ER4047 TIG Filler Rod & MIG Wire
This table shows where ER4047 filler metal can be used and its key technical limits, including compatible alloy grades.
| Base Alloy Type | Specific Grade / Alloy | P-Number | Features or Benefits |
|---|---|---|---|
| Wrought Al-Mg-Si | 6061, 6063, 6082 | P-23 | High Fluidity: Excellent wetting action and flow into tight structural joints. |
| Wrought Manganese | 3003, 3004 | P-21 | Leak-Tight: Higher silicon content ensures dense, pressure-tight welds. |
| Pure Aluminum | 1100 | P-21 | Reduced Shrinkage: Minimises solidification cracking in thin-gauge materials. |
| Cast Al-Si | 356, A356, 319, 443 | N/A | Brazing Capability: Low melting range allows use as a specialised brazing alloy. |
Welding Parameters for ER4047 TIG Filler Rod & MIG Wire
The table below lists suggested welding settings for ER4047 in both GTAW and GMAW, which helps keep the arc stable and the weld quality consistent.
| Process / Diameter | Current (A) | Shielding Gas |
|---|---|---|
| GTAW – 1.6 mm | 50–100 | 100% Argon, AC |
| GTAW – 2.4 mm | 90–160 | 100% Argon, AC |
| GTAW – 3.2 mm | 130–220 | 100% Argon, AC |
| GMAW – 0.8 mm | 50–110 | 100% Argon, DCEP |
| GMAW – 1.0 mm | 70–150 | 100% Argon, DCEP |
| GMAW – 1.2 mm | 110–230 | 100% Argon, DCEP |
The eutectic composition creates a smooth, self‑levelling weld pool, so ER4047 works very well for brazing gaps and fillet welds that rely on capillary flow.
Premium Industrial Materials
Get ER4047 TIG Filler Rod & MIG Wire at Competitive Prices
ISO Certified
Custom Sizes
Fast Delivery
Industrial Welding Applications of ER4047 MIG Wire
ER4047 MIG wire is commonly used for welding and brazing aluminium, where a good flow, minimal distortion, and better resistance to cracking are needed.
- Automotive: Used for welding engine blocks, cylinder heads, transmission cases, EV battery trays, oil pans, and intake manifolds in automotive manufacturing and repair.
- Heat Exchangers: Applied in aluminium radiators, oil coolers, charge air coolers, and condenser plates, where leak-tight, high‑quality welds are essential.
- Brazing: Suitable for furnace and torch brazing of 1100, 3003, and 6063 aluminium assemblies with wire or ring preforms.
- Cast Aluminium Repair: Ideal for rebuilding pump housings, valve bodies, and impellers, effectively filling porosity due to excellent fluidity.
- Food Processing: Used for fabricating and repairing aluminium vessels and piping in non‑corrosive food contact systems, where cleanliness, and weld integrity are critical.
Storage and Handling of ER4047 TIG Rod
Store ER4047 rods and spools in their original, sealed packaging in a clean, dry place. Keep them away from moisture, oil/grease and general shop dirt. Before welding, wipe the wire with a clean, lint-free cloth. If the packaging stays sealed, the shelf life is unlimited.
Available Forms and Packaging of ER4047 Filler Rod
This table lists the available forms and packaging options for ER4047 filler rod, including TIG rods, MIG spools and brazing preforms.
| Form | Diameter | Packaging |
|---|---|---|
| TIG Rod | 1.6, 2.4, 3.2 mm | 5 kg tubes, 1000 mm length |
| MIG Spool | 0.8, 1.0, 1.2 mm | 5 kg / 7 kg spools |
| Brazing Ring/Preform | On request | On request |
All shipments come with EN 10204 3.1 mill test certificates.
How to Order ER4047 from Nicorex Alloys
To place an order for ER4047 welding wire from Nicorex Alloys, share the following details:
- Wire Type: GTAW/GMAW ER4047 (AWS A5.10)
- Size: 0.8-3.2 mm, spool/cut length
- Current Type: DCEN/DCEP with Argon shielding gas
- Welding Position: Flat, horizontal, vertical, overhead
- Material Grade: UNS A94047, EN ISO AlSi12
- Quantity: Spool weight or cut length kg
- Standard: AWS A5.10, ASME SFA 5.10
- Documentation: MTC EN 10204 3.1
- Packaging: Rods/wires
- Delivery Destination: Domestic or international
Frequently Asked Questions
What is the price of ER4047 Welding Wire per kg in India?
ER4047 usually costs about the same as ER4043. Contact Nicorex Alloys with your required quantity and wire diameter to get the latest price per kg.
What is the difference between ER4047 and ER4043?
ER4047 has 11-13% silicon while ER4043 has 4.5-6%. ER4047 melts at a lower temperature, flows better, shrinks less, gives higher fillet strength, and can be used for brazing. ER4043 is more ductile and more general-purpose.
Can ER4047 be used for brazing aluminium?
Yes. ER4047 (BAlSi-4) melts at about 573°C, slightly below the solidus of common alloys like 6061. This allows capillary flow without melting the base metal, so it is widely used for furnace brazing of heat exchangers and HVAC parts.
What is the F-Number for ER4047?
ER4047 has F-Number F-22 under ASME Section IX QW-432. The A-Number is not applicable. The relevant ASME filler metal specification is SFA-5.10.
Does ER4047 produce a dark weld after anodising?
Yes. Because of its high silicon content, ER4047 welds turn dark grey to black after anodising, even darker than ER4043. Do not use it where colour match is important; ER5356 is preferred there.
When should ER4047 not be used?
Avoid using ER4047 for 5XXX alloys with >3% Mg, anodised parts needing colour match, marine or saltwater service, joints needing maximum ductility, and 2XXX aerospace alloys.