Coreshield 71T-8 OS

Coreshield 71T-8 OS is a self‑shielded flux‑cored welding wire designed for critical structural applications such as offshore TKY joints, pipe structures, bridges and storage tanks. It offers excellent low‑temperature impact toughness down to -40 °C while maintaining good arc characteristics and easy slag removal.

Key Features

• Self‑shielded flux‑cored wire for use in all welding positions
• excellent impact toughness at -40 °C
• High welding current compatibility (DC‑)
• Low diffusible hydrogen (<8 ppm)
• Easy slag removal and high welder appeal

Specifications

• Classifications: SFA/AWS A5.29 : E71T8‑Ni1 J H8, EN ISO 17632‑A : T42 4 1Ni Y NO 1
• Approvals: ABS, BV, CE, CWB, DNV, UKCA (see details above)
• Welding Current: DC‑
• Diffusible Hydrogen: < 8 ppm
• Alloy Type: C‑Mn‑Ni‑Al
• Tensile Properties (As Welded): Yield 429 MPa, Tensile 521 MPa, Elongation 28 %
• Charpy Impact (As Welded, -40 °C): 172 J
• Typical Weld Metal Analysis (%): C 0.06, Mn 1.05, Si 0.15, S 0.003, P 0.006, Ni 0.93, Al 0.92
• Deposition Data (2.0 mm): 160‑250 A, 18‑23 V, 1.4‑2.6 m/min, 1.1‑2.3 kg/h

Applications

• Offshore structural welding (TKY joints)
• Pipe and pressure vessel fabrication
• Bridge and storage tank construction
• Low‑temperature service environments