Ganpat Metal Industries is renowned Distributor and Manufacturer of Carbon Steel Butt Weld Fittings, which cannot be hardened by thermal treatment, but does work harden. Solution treatment (annealing) – heat is up to 1020 Degree C – 1100 Degree C and cool rapidly. The most agree that these Carbon Steel Pipe Fittings is alloyed with more than eight percent of its weight being other elements beside iron and carbon, is high alloy steel.