This ER 70S-A1 / W2Mo TIG wire is a copper-coated, heat-resisting filler wire containing 0.5% molybdenum, specifically developed for welding low-alloy creep-resistant steels that demand high tensile strength and excellent performance at elevated temperatures.
The weld deposit offers high resistance to cold cracking and is suitable for service temperatures of up to 500 °C, making it an ideal choice for critical applications in pressure systems and high-temperature environments. Manufactured using virgin raw materials from specialised steel mills, this wire delivers consistent quality, reliability, and mechanical performance.
Commonly used across the boiler, petrochemical, shipbuilding, pressure vessel and structural engineering sectors, this wire is well suited to demanding industrial fabrication work.
Key Features
Heat-Resisting TIG Wire: Contains 0.5% molybdenum for improved strength and creep resistance at elevated temperatures.
Copper-Coated Finish: Ensures stable arc characteristics, smooth wire feed and consistent weld quality.
High Resistance to Cold Cracking: Produces a tough, crack-resistant weld deposit, even in demanding service conditions.
High-Temperature Performance: Recommended for working temperatures of up to 500 °C.
Wide Industrial Use: Ideal for steam boilers, pressure tanks, gas pipelines, shipbuilding, petrochemical plants, heat exchangers, cranes, bridges and heavy fabrication.
Consistent Quality: Produced from virgin raw materials sourced from specialised steel mills for dependable performance.
Shielding Gas: TIG — I1 (Argon) to EN ISO 14175.
Welding Positions: PA, PB, PC, PD, PE, PF to EN ISO 6947.
Standards Compliance:
- EN ISO 636-A: W 2Mo.
- AWS A5.28: ER 70S-A1.
Mechanical Properties (Typical):
- Tensile Strength: 610 MPa.
- Yield Strength: 520 MPa.
- Elongation: 25%.
- Impact Strength: 150 J @ +20 °C, 47 J @ –40 °C.
Chemical Composition (Typical %):
C: 0.09 | Si: 0.60 | Mn: 1.20 | P: <0.015 | S: <0.015 | Cu: <0.25.
Cr: <0.15 | Ni: <0.10 | Mo: 0.50 | Al: <0.030 | V: <0.020 | Zr+Ti: <0.050.
Available Diameters & Packaging (Length 1000 mm for all sizes):
1.60 mm / 5 kg spool
2.40 mm / 5 kg spool
3.20 mm / 5 kg spool
Download Product Specification.
