Intro
Hard-facing wire doesn’t just join metal — it rebuilds it. Washington Alloy’s THF-700HT flux-cored MIG wire is engineered for abrasion resistance and metal recovery in industrial repair work. From loader buckets to crusher parts, this wire keeps production moving where standard filler metals fail.
Key Takeaways
- Type: Flux-cored hard-facing wire (gas-shielded).
- Composition: Iron-based alloy with chromium and carbon for wear protection.
- Diameter / Spool: .045 in (1.1 mm) × 33 lb (15 kg).
- Hardness: ~55–60 HRC after cooling — ideal for metal-to-metal wear.
- Applications: Earth-moving equipment, agricultural blades, crusher rolls, and heavy fabrication repair.
Why Use Hard-Face Wire
THF-700HT is designed for severe abrasion under moderate impact. The self-shielded flux core allows outdoor repair without external shielding gas, making it a reliable choice for field maintenance. Operators report a smooth arc, good slag release, and minimal spatter — critical when you’re rebuilding high-value components on tight downtime.
Performance and Best Uses
- Excellent metal recovery: high deposition rate and dense overlay.
- Good for carbon or low-alloy base metals.
- One-pass or multi-layer capable: each layer retains hardness after cooling.
- Shielding gas required: 100% Co2 or 75/25 Argon/Co2, and run on DC-electrode positive polarity.
Comparison Table
| Model | Key Specs | Best For | ArcWeld Store | Amazon |
|---|---|---|---|---|
| Washington Alloy THF-700HT-173 | .045 in (1.1 mm) × 33 lb • Flux-Cored • Hardness 55–60 HRC • DC+ | Rebuilding worn parts • Outdoor repairs • Earth-moving & crusher components |
Washington Alloy THF-700HT-173 Hard Face Flux-Cored Mig Wire .045 x 33 Lb. Spool$330.70 In Stock View Product | Amazon Listing |
Safety Notes
Follow AWS A5.21 and manufacturer recommendations for fume extraction and ventilation. Use appropriate PPE: welding helmet (ANSI Z87.1), FR gloves, and sleeves. Hard-facing fumes may contain chromium and manganese — maintain air quality per OSHA 1910.252 standards.
FAQ
Q: Can this wire run on a 200 A MIG machine?
A: Yes. It performs best between 180–250 A with 20–25 V, depending on feed speed.
Q: Does it need a shielding gas?
A: Yes. THF-700HT is gas-shielded flux-cored wire, use 100% CO2 or 75% Argon / 25% CO2
Q: Can I machine the overlay afterward?
A: Limited — the deposit is very hard. Use grinding rather than cutting tools.
Q: What base metals work best?
A: Mild or low-alloy steels — avoid high-carbon or hardened substrates without preheat.
Where to Buy $330.70 In Stock
Washington Alloy THF-700HT-173 Hard Face Flux-Cored Mig Wire .045 x 33 Lb. Spool
