The Weld Star ER307Si Stainless Steel TIG Wire is an austenitic filler wire containing high manganese, designed to produce fully austenitic weld deposits in most applications. It offers high mechanical strength, excellent crack resistance, and smooth weld bead appearance due to its increased silicon content, making it ideal for critical structural and industrial applications.
This wire is suitable for dissimilar welding between steel and stainless steel, armour plate, exhaust systems, and stress-relieving buffer layers on crack-sensitive base metals. Commonly used in environments exposed to atmospheric and corrosive media, it delivers reliable, predictable performance in demanding stainless steel fabrication projects.
Key Features
Austenitic Stainless Alloy: High manganese content ensures fully austenitic weld deposits.
High Mechanical Strength: Tensile strength ≥500 MPa and yield strength ≥350 MPa.
Crack-Resistant Weld Metal: Maintains integrity on stress-sensitive and hardfacing applications.
Smooth Weld Bead Appearance: Increased silicon content promotes fluid weld pool and smooth finish.
Versatile Applications: Suitable for armour plates, exhaust systems, dissimilar steel welding, and stress-relieving layers.
Consistent Quality: Produced from virgin raw materials by specialised steel mills for dependable performance.
Standards Compliance: EN ISO 14343-A – W 18 8 Mn | AWS A5.9 – ER 307Si.
Typical Chemical Composition (%): C: 0.045 | Mn: 6.06 | Si: 0.82 | S: 0.005 | P: 0.029 | Ni: 8.02 | Cr: 18.35 | Mo: 0.05 | Cu: 0.030.
Mechanical Properties (Typical): Tensile Strength: ≥500 MPa | Yield Strength: ≥350 MPa | Elongation: ≥25% | Impact Strength: ≥50 J (Values may vary depending on welding parameters, base material, and shielding gas).
Shielding Gas: TIG – I1 (Argon) per EN ISO 14175.
Welding Positions: PA, PB, PC, PD, PE, PF per EN ISO 6947.
Workshop-Friendly Packaging: Available in multiple TIG diameters (1.60mm, 2.40mm, 3.20mm), supplied in 5kg packs with 1000 mm rod length for professional workshop and site use.
Download Product Specification.
