SIF 312 Stainless Steel TIG Filler Rods - 1.0mm to 2.4mm Dia. (ER312) - Dissimilar Steels
- Material: 29.9 Stainless Steel
- Pack Size: 2.5 KG – 5 KG
- Rod Diameter: 1 mm- 2.4 mm
- AWS Code: ER 312

312 Stainless Steel TIG Rods are a 29.9 stainless TIG filler rod, designed specifically for welding difficult-to-weld steels, including Mn steels, tool steels, spring steels, and dissimilar materials. With a high resistance to weld metal cracking, SIFSTEEL 312 TIG welding wire stands out as a problem solver for a variety of steel grades, including stainless and those that are difficult to weld.
Features and Benefits
- Versatile Welding: Suitable for a range of difficult-to-weld steels.
- High Resistance: Offers a high resistance to weld metal cracking.
- Problem Solver: Can be used for various steel grades, including stainless and challenging-to-weld steels.
- Welding Positions: Suitable for various positions, ensuring flexibility in welding tasks.
Typical Applications
- Joining Hard Steels: Ideal for joining hard manganese steels, tool steels, and spring steels.
- Buffering: Can be used for buffering tasks.
- Dissimilar Steel Welding: Suitable for joining dissimilar steel grades.
- Specialized Welding: Used for welding armour plate, hardenable steels, tool, die and spring steels, and austenitic manganese steels. Also suitable for hardfacing clutches, gear wheels, shafts, and buffer layers prior to hardfacing.
Welding Positions

| Product Type | Special Electrode |
| Part Number | RO351025 |
| Diameter | 1 mm – 2.4 mm |
| Weight | 2.5 KG – 5 KG |
| C | 0.1% |
| Si | 0.4% |
| Mn | 1.6% |
| Ni | 9% |
| Cr | 30% |
| Mo | 0.1% |
| Melting Point | 1440°C |
| Ultimate Tensile Strength | 750 N/mm² |
| Hardness | 200 |
| Current | DC = – Tungsten |
| Shielding Gas | I1 = Pure Ar |
| Electrode Type | WT20 |
| WC20 | |
| WL20 |
| EN ISO 14343 | 29 9 |
| BS 2901 | 312S94 |
| AWS A5.9 | ER 312 |
| Brand | Weldability Sif |
| Weight | 2.5kg · |
| Diameter | 2.4mm · |
| AWS Classification | ER 312 |
| Material Type | Stainless Steel (ER3xx) |
| TIG Rod Diameter | 1 mm, 1.2 mm, 1.6 mm, 2.4 mm |
| TIG Rod Weight | 1 kg, 2.5 kg, 5 kg |
| SKU | Weight | Diameter | Stock Status | |
|---|---|---|---|---|
| RO351050 | 5kg | 1 0mm | In Stock | £58.70 ex VAT £70.44 inc VAT |
| RO351225 | 2 5kg | 1 2mm | Out of Stock | £35.60 ex VAT £42.72 inc VAT |
| RO351625 | 2 5kg | 1 6mm | Out of Stock | £39.06 ex VAT £46.87 inc VAT |
| RO352425 | 2 5kg | 2 4mm | In Stock | £37.74 ex VAT £45.29 inc VAT |
| RO353225 | 2 5kg | 3 2mm | Out of Stock | £38.10 ex VAT £45.72 inc VAT |
| RO351025 | 2 5kg | 1 0mm | Out of Stock | £60.00 ex VAT £72.00 inc VAT |
| RO351250 | 5kg | 1 2mm | In Stock | £100.00 ex VAT £120.00 inc VAT |
| RO351650 | 5kg | 1 6mm | In Stock | £100.00 ex VAT £120.00 inc VAT |
| RO352450 | 5kg | 2 4mm | In Stock | £100.00 ex VAT £120.00 inc VAT |
Product Information
Download PDFA carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.
SIF 312 Stainless Steel TIG Filler Rods - 1.0mm to 2.4mm Dia. (ER312) - Dissimilar Steels Get in touch
Have a question about this product? Our team of welding experts are here to help.
Visit Us
12 Mary Seacole Road
The Millfields
Plymouth, Devon
PL1 3JY














Reviews
There are no reviews yet