ALFA ER312 Stainless Steel TIG Welding Filler Rod is a stainless steel TIG welding filler rod designed for welding dissimilar and difficult-to-weld steels. It provides high-strength weld deposits with excellent resistance to hot cracking, making it suitable for tool steels, high-carbon steels, shafts, gear teeth, and other demanding industrial welding applications.
Product Specifications
| Specification | Details |
|---|---|
| Brand | ALFA |
| Product Name | ALFA ER312 Stainless Steel TIG Welding Filler Rod |
| Product Type | Stainless Steel TIG Welding Filler Rod |
| Classification | AWS/SFA 5.9 ER312 |
| BS Classification | BS 2901-90 312S94 |
| DIN Classification | DIN 8556-86 WSGX10CrNi 30.9 |
| Material | Stainless Steel |
| Welding Process | TIG / GTAW |
| Welding Current | DC (-) |
| Shielding Gas | Pure Argon 99.99% |
| Argon Flow Rate | 6–12 L/min |
| Ferrite Content | Approximately 40 FN |
| Heat Resistance | Very Good |
| Oxidation Resistance | Very Good |
| Corrosion Resistance | Good |
| Standard Length | 1000 mm |
| Available Sizes | 1.6, 2.0, 2.40/2.50, 3.15/3.20, 4.0 mm |
| Packing / Packet | 5 kg |
| Packing / Box | 20 kg |
Chemical Composition
| Element | Specification |
|---|---|
| Carbon (C) | 0.15% Max |
| Manganese (Mn) | 1.0–2.50% |
| Silicon (Si) | 0.30–0.65% |
| Chromium (Cr) | 28.0–32.0% |
| Copper (Cu) | 0.50% Max |
| Nickel (Ni) | 8.0–10.5% |
| Molybdenum (Mo) | 0.75% Max |
| Sulphur (S) | 0.030% Max |
| Phosphorus (P) | 0.030% Max |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (TS) | 700–850 N/mm² |
| Elongation (L=4D) | 22–30% |
| CVN Impact Value at 20°C | 50–90 Joules |
Typical Applications
- Dissimilar metal welding
- High-carbon steel welding
- Tool steel welding
- Shaft repair
- Gear tooth repair
- Free-cutting steel welding
- Stainless steel to carbon steel joints
- Buffer layers before hardfacing
- Metal-to-metal wear-area surfacing
- Hot-working tools
- Industrial repair and maintenance
Packing Details
| Diameter | Length | Packing / Packet | Packing / Box |
|---|---|---|---|
| 1.6 mm | 1000 mm | 5 kg | 20 kg |
| 2.0 mm | 1000 mm | 5 kg | 20 kg |
| 2.40 / 2.50 mm | 1000 mm | 5 kg | 20 kg |
| 3.15 / 3.20 mm | 1000 mm | 5 kg | 20 kg |
| 4.0 mm | 1000 mm | 5 kg | 20 kg |
Related Products
YAMATO Oxygen Regulator
The YAMATO Oxygen Regulator is a heavy-duty, precision-engineered gas pressure control device designed to reduce high-pressure oxygen from a cylind...
Weldcraft 2411 TIG Welding Ceramic Nozzle 6.0mm × 40mm – 10 Pcs
Weldcraft 2411 TIG Welding Ceramic Nozzle The Weldcraft 2411 TIG Welding Ceramic Nozzle is a replacement ceramic gas nozzle designed for TIG weldin...
2413 Ceramic TIG Welding Nozzle
The WZ2411040 TIG Ceramic Gas Nozzle is designed for TIG welding applications to direct shielding gas around the tungsten electrode and welding arc...
GASCO Single Stage Argon Regulator
The GASCO Single Stage Argon Regulator is a precision-engineered pressure regulator designed to reduce high-pressure argon gas from a cylinder to a...
GASCO Single Stage Pressure Acetylene Regulator
The GASCO Single Stage Pressure Acetylene Regulator (GDA-2E) is a precision-engineered industrial gas regulator designed to safely reduce acetylene...
WP18 TIG Torch – Water Cooled TIG Welding Torch
The WP18 TIG Torch is a high-performance water-cooled torch designed for professional TIG welding applications. Its water-cooling system helps cont...
WP26 TIG Torch – Air Cooled TIG Welding Torch
The WP26 TIG Torch is a professional-grade air-cooled TIG welding torch designed for reliable performance in demanding welding environments. Its du...
YAMATO Nitrogen Regulator
The YAMATO Nitrogen Regulator is a durable, precision-engineered gas pressure control device designed to reduce high-pressure nitrogen from cylinde...
GC200 & GC300 TIG Torch – Gas Cooled TIG Welding Torch
The GC200 & GC300 TIG Torch is designed for TIG welding applications where reliable performance, simple operation, and easy maintenance are imp...
WC400 & WC600 TIG Torch – Water Cooled TIG Welding Torch
The WC400 & WC600 TIG Torch is engineered for professional and industrial TIG welding applications requiring high current capacity. Unlike gas-...









