China SAE1075 Steel Rod C75 Square Steel Bar Grade 75 Steel Wire Manufacturer SAE1075 Spring Steel Bar, Find details about China 65mn Spring Steel Bar, 60si2mn Steel Rod from SAE1075 Steel Rod C75 Square Steel Bar Grade 75 Steel Wire Manufacturer SAE1075 Spring Steel Bar
C | Si | Mn | Cr | Mo | P | S |
0.38-0.43 | Max. 0.40 | 0.60-0.90 | 0.90-1.20 | 0.15-0.30 | ≤0.035 | ≤0.035 |
Forging | Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc. |
Annealing | Heat to 830°C-850°C.Cool in furnace. |
Normalising | Heat to 870°C-900°C.Cool in still air. |
Stress Relieving | Annealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air. |
Hardening | Heat to 830°C-880°C. Quench in oil or polymer. |
Tempering | Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided. |