Annealing annealing No.1 "760 ± 10 ℃ annealing furnace cooling to 400 ℃ air cooling. HB220-230 normalizing normalize No.4 860 ± 10 ℃ normalizing, cooled baked. Quenching quenching + tempering No.5 840 ± 10 ℃ quenching in water or oil (depending on the complexity of the product shape), 680-700 degrees tempering. HB <217 quenching quenching + tempering No.6 840 ± 10 ℃ quenching oil 42crmo manufacturers, then 470 degrees tempering. HRC41-45 quenching quenching + tempering No.7 840 ± 10 ℃ 42crmo oil quenched alloy, and then tempered to 480 degrees. HRC35-45 quenching quenching + tempering No.8 850 ℃ quenching oil 42crmo, then 510 degrees tempering. HRC38- 42 quenched quenching + tempering No.9 850 ℃ quenching oil, then 500 degrees tempering. HRC40-43 quenching quenching + tempering No.10 850 ℃ quenching oil, then 510 ℃ tempered. HRC36-42 quenching quenching + tempering No.11 850 ℃ quenching oil, then 560 ℃ tempered. HRC32-36 quenching quenching + tempering No.12 860 ℃ oil quenching, tempering and then 390 degrees. HRC steel adjusters Equation Editor square tube :( length + width) × thickness × 2 × 0.00785 cold :( length × width) × thickness × 0.00785 hot plate :( length × width) × thickness × 0.00785 :( pipe OD - Wall Thickness) × wall thickness × 0.02466 flat :( length × width) × 0.00785 yuan steel :( diameter × diameter) × 0.00617 square steel :( length × width) × 0.00785 galvanized pipe :( OD - Wall Thickness) × wall thickness × 0.02466 × 1.06 plate: (length × width) × thickness × 0.00785 galvanized sheet :( length × width) × thickness × 0.00785 × 1.06 seamless :( OD - Wall Thickness) × × 0.02466 42crmo pipe wall thickness, Xiaogan 42crmo, Katherine source steel from Liaocheng Katherine source Pipe Limited. Liaocheng Katherine source Pipe Co., Ltd. (www.lczygg.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly The perfect source of innovative ideas will lead pipe trillion into the brilliant and you work for a better future!