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Help CenterAlloy Forged Steel Round Bar Mould Tool Steel 42CrMo4/C45/1.2344/1.2379 Forged Mould Steel Round Bar
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Equivalent grades GB DIN AISI JIS 42CrMo 1.7225 4140 SCM440 Chemical Composition C Si Mn Cr Mo P S 0.38-0.43 0.40max 0.60-0.90 0.90-1.20 0.15-0.30 ≤0.035 ≤0.035 Available size Round steel bar 10-800mm Flat steel bar 25-400mm*200-800mm Surface condition Black surface/ Grinded/ Machined Hardness Annealed HBS 217 max Characteristics 4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness. High creep strength. Repeated impact resistant capability. Applications 4140 Alloy Steel/SAE 4140 Steel Price is use to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering . Heat treatment ForgingHeat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc. AnnealingHeat to 830°C-850°C.Cool in furnace. NormalisingHeat to 870°C-900°C.Cool in still air. Stress RelievingAnnealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air. HardeningHeat to 830°C-880°C. Quench in oil or polymer. TemperingHeat 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. |
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