Unibraze
Unibraze low-alloy steel TIG rods - ER80S-D2 and ER90S-B3.
ER80S-D2: molybdenum for strength
ER80S-D2 adds manganese and molybdenum for higher strength than ER70S fillers. It is widely used on 4130 chromoly tubing in motorsport, aircraft-style frames and roll cages, and on medium-strength steels that need more than mild steel filler.
ER90S-B3: for 2-1/4 Cr - 1 Mo steels
ER90S-B3 matches 2-1/4% chromium, 1% molybdenum steels such as P22 pipe, used in boilers, power generation and high-temperature, high-pressure service.
Procedure matters more than with mild steel
- Preheat - chrome-moly steels need controlled preheat to prevent cracking. Confirm it with a temperature stick, not by eye.
- Interpass temperature - follow the procedure limit.
- Post-weld heat treatment - B3 welds normally require PWHT to restore toughness. Follow the welding procedure specification for the job.
- Cleanliness - clean rods and base metal to bright metal to keep hydrogen out.
See steel TIG rods, and Tempilstik temperature sticks for preheat control.
Trade and volume pricing: call 905-919-1177 or email orders@mapindpro.com.
Counter pickup in North York.
