Sell 4140 / Din 1.7225 Alloy Steel

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1. DIN1.7225/SAE4140/GB42CrMo, JIS SCM440 alloy steel round bar 2. Hot rolled condition, annealing or harden, black or milled surface 3. Pre-heat treatment: Annealing: Heat to 840-860 degree, keep 2H, furnace cold, hardness 217HBS MAX High temperature tempering: Heat to 680-700 degree, air cold, hardness 217HBS MAX 4. Heat treatment: Normalization: Heating to 840 to 880 degree, maintenance, furnace cooling to 600 degree, then in air. Stress relieving: After rough heat to 500 degree, maintenance raff. In oven to 400 degree, then in air. Hardening: Preheating from 600 to 650 degree, austenitizing At 840 to 880 degree, quenching in oil. Tempering: Heating to 550 - 650 degree and maintenance regime, again depending on the mechanical Properties 5. Hot rolled technology: EAF+LF+VD 6. Ultrasonic test standard: SPE1921-GR3, CLASS C/C or D/D 7. Production leadtime: 7~10 days Product Feature Chemical component: C 0.17-0.23 Mn 0.30-0.60 Si 0.15-0.40 Cr 1.25-1.75 Ni 3.25-3.75 Cu 0.25 MAX P 0.030 max S 0.030 Product Specification/Models Hot rolled condition 16~255*2000~5800 mm Application General service industries (petroleum, food, chemical, paper, fertilizer, Fabric, aviation and nuclear) Fluid, gas and oil transport Pressure and heat transmission Construction and ornament Boiler heat exchangers Other Information we specializes in plastic mould steel, hot work mould steel, cold work mould steel alloy steel and carbon structural steel, such as : P20, P20+Ni, 1.2714, 1.2083, 1.2316, H13, O1, D2, D3, D5, 1045, 1050, A3, 52100(EN31), 4137, 4140, 4340, 5140, 6150, 8620 and SCM420

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DONGGUAN RUIYUAN STEEL CO.,LTD

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