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Material | C% | Rm ,MPa | ReL ,MPa | A , | External diameter mm | Wall-thickness/mm | Non straightness | Length/m | Roundness |
30CrMo | 0.26/0.34 | ≥910 | ≥765 | ≥12 | 232±0.75% 273±0.75% 325±0.75% 356±0.75% 406±0.75% | 4.2,+15%,-0 4.8,+15%,-0 5.0, +15%,-0 5.6, +15%,-0 | 1.5mm/M | 3-10.5 |
≤0.5%diameter |
35CrMo | 0.32/0.40 | ≥960 | ≥825 | ≥12 | |||||
34CrMo4 | 0.30/0.37 | ≥980 | ≥835 | ≥12 | |||||
34Mn2V | 0.30/0.37 | ≥745 | ≥530 | ≥16 | |||||
P≤0.020S≤0.020P+S≤0.030.Thermal treatment: quenching and tempering |
cylinder