Yes, AR 450 steel is weldable, but with proper precautions.
AR 450 (Abrasion Resistant 450 BHN) is a hardened wear-resistant plate. Because of its high hardness and carbon content, direct welding without preheating can lead to cracking, brittleness, and reduced toughness in the heat-affected zone (HAZ). That’s why weldability depends on:
Key Welding Guidelines for AR 450:
- Preheat Temperature: 150–250°C (depending on thickness)
- Low-Hydrogen Electrodes: Use E7018 or equivalent
- Interpass Temperature: Maintain within 200–250°C
- Post-Weld Cooling: Slow cooling recommended to avoid thermal stress
- Avoid Overheating: Excess heat can reduce hardness near the weld
- Edge Preparation: Use mechanical methods (grinding, not flame cutting)
Suitable Welding Processes:
- Shielded Metal Arc Welding (SMAW)
- Gas Metal Arc Welding (GMAW / MIG)
- Flux-Cored Arc Welding (FCAW)
Common Mistakes to Avoid:
- Skipping preheat
- Fast cooling after welding
- Using incompatible filler materials
- Welding large sections without stress relief
Applications Where Welding AR 450 is Common:
- Bucket Liners
- Bulldozer blades
- Dump truck bed repairs
- chute system in mining plants
Need Help with Weldable AR 450 Plates?
We stock cut-to-size weldable AR450 plates under our HIND HARD brand with welding guidance, MTC, and technical support.