The Weld Star ER100S-G / Mn3NiCrMo TIG Wire is a high-strength, crack-resistant filler developed for TIG (GTAW) welding of nickel-enriched, fine-grained steels used in demanding, low-temperature structural applications. With excellent mechanical properties and outstanding impact toughness down to –50 °C, this filler is ideal where both strength and low-temperature resilience matter.
Commonly used in industrial segments such as transport and ground movement systems, the building industry, bridges, tanks, railway structures, mining equipment, shipbuilding and other heavy engineering sectors, this alloy delivers reliable, predictable performance.
Key Features
High-Strength Low-Temperature Alloy: ER100S-G (Mn3NiCrMo) designed for high tensile and yield strength in fine-grained steel welds.
Extreme Crack Resistance: Alloy chemistry gives enhanced resistance to cold cracking and other weld defects in demanding applications.
Excellent Impact Toughness: Weld deposits maintain high impact strength (50 J) even at –50 °C, suitable for sub-zero environments.
Wide Industrial Use: Ideal for means of transport and ground movement, infrastructure, tanks, bridges, mining, shipbuilding and structural fabrication.
Consistent Quality: Produced from virgin raw materials by specialised steel mills, ensuring reliable composition and performance.
Standards Compliance: EN ISO 16834-A, Mn3NiCrMo, AWS A5.28, ER100S-G.
Chemical Composition (Typical %): C: 0.08 | Si: 0.75 | Mn: 1.40 | Cr: 0.55. | Ni: 0.60 | Mo: 0.25 | P & S: <0.015 | Cu, Al, V, Ti, Zr: trace.
Mechanical Properties (Typical): Tensile Strength: 730 MPa | Yield Strength: 640 MPa | Elongation: 20% | Impact Strength: 50 J @ –50 °C.
Shielding Gas: TIG - I1 (Argon) per EN ISO 14175.
Welding Positions: PA, PB, PC, PD, PE, PF per EN ISO 6947.
Workshop-Friendly Packaging: Supplied on 5kg spools with common TIG diameters 1.60mm, 2.40mm and 3.20mm; each spool 1000mm in length.
Download Product Specification.
