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18CrNiMo7-6 material 18crnimo7-6,18crnimo7-6 price, 18crnimo7-6 round sales hotline: 13818800322, Tong Fung Industrial (Shanghai) Co., Ltd Chemical Composition C carbon:! 0.15-0.21 Si Si: ≤0.40 Mn Mn: 0.5-0.90 P P: ≤0.025 S S: ≤0.015 Cr Cr: 1.5-1.8 Ni Ni: 1.40-1.70 Mo: 0.25-0.35 Al: ≤0.05 Cu: ≤0.30 ● carburizing structural steel thermal processing, heat treatment and mechanical Performance 1. thermal processing temperature / ℃: 1150-850 2. heat treatment temperature / ℃: A: Annealing: 650-700 ℃ B: carburizing: 900-950 ℃ C: quenching Ⅰ (core section): 840-870 ℃ D : quenching Ⅱ (Surface): 800-830, oil E: Tempering: 170-210 ℃ 3. After annealing hardness mechanical properties HBW≤229 4. core section (rear surface hardening) Size / mm: ￠ 11, ￠ 30, ￠ 63 Tensile strength MPa: ≥1180-1420 1080-1320 980-1270 Yield strength MPa: ≥830 785 685 Elongation%: 788 surface shrinkage%: 353 535 Impact Energy J: 41 41 -