HF-55NHM E81T1-WGM

New Launch: HF‑1D Seamless Flux‑Cored Welding Wire (AWS A5.20 E71T‑1)

We are pleased to announce the official release of our brand‑new HF‑1D seamless flux‑cored welding wire, classified to AWS A5.20 E71T‑1. Uniquely engineered for dual‑gas operation, this wire delivers stable and consistent welding performance with either 100% carbon dioxide (CO₂) or argon‑CO₂ mixed shielding gas, giving fabricators greater flexibility to match on‑site working conditions.
Different from conventional seam‑welded flux‑cored wires, HF‑1D adopts advanced seamless tube manufacturing technology. The fully closed tubular structure prevents moisture absorption and flux leakage during storage and transportation, ensuring stable chemical composition and low diffusible hydrogen in deposited metal, which greatly reduces the risk of hydrogen‑induced cracking.

Core Advantages of HF‑1D

  1. Dual‑gas compatibility for wide‑range adaptability

    HF‑1D works reliably with pure CO₂ for cost‑sensitive jobs, while also performing excellently under Ar‑CO₂ mixed gas. Operators can switch shielding gases without changing welding wire, simplifying material management for multi‑workshop sites. Arc remains smooth and stable regardless of which shielding gas is selected.

  2. Superior anti‑moisture property from seamless construction

    The seamless closed shell eliminates gaps along the wire body. It hardly absorbs moisture even under ordinary storage environments. Compared with standard seamed flux‑cored wires, it minimizes weld porosity and hydrogen‑related defects, lowering reject rates for critical structural welding.

  3. Stable arc and remarkably low spatter

    It features soft, concentrated arc characteristics. Metal transfer is smooth during welding, generating minimal spatter. Less spatter reduces post‑weld grinding and cleaning work, improves working efficiency and cuts consumable wear on contact tips and nozzles.

  4. Excellent slag detachability and attractive weld bead appearance

    The rutile‑type slag system solidifies compactly yet peels off easily after welding, even in vertical‑up and overhead welding positions. Weld beads are smooth, uniform and well‑shaped, delivering aesthetic results for both single‑pass and multi‑pass welds.

  5. Reliable mechanical properties for structural applications

    Deposited weld metal meets all AWS A5.20 E71T‑1 requirements, offering good tensile strength, ductility and low‑temperature impact toughness. It shows outstanding crack‑resistance, suitable for welding carbon steel and 490 MPa grade low‑alloy steel structures.

  6. All‑position welding capability and high deposition efficiency

    HF‑1D supports all‑position welding including flat, horizontal, vertical‑up and overhead positions. It provides high deposition rate, helping users raise production throughput in heavy fabrication without sacrificing weld quality.

  7. Consistent wire feed performance

    Thanks to precise seamless forming, the wire maintains uniform roundness and hardness. It runs smoothly through welding torches with less friction, reducing wire‑jamming troubles and ensuring continuous, stable welding for long‑run production.

Typical Applications

HF‑1D is well‑suited for shipbuilding, steel structure construction, bridge fabrication, machinery manufacturing, pressure vessels and general heavy‑duty carbon‑steel workshops. It is an ideal choice for both on‑site field welding and indoor workshop production where gas condition varieses.