spring steel-k8凯发官网
spring steel
1 main use
strength, hardness, slightly higher elasticity and hardenability, good machinability in the annealed state, poor cold deformation plasticity and weldability. it has a tendency to be sensitive to overheating and temper brittleness. suitable for large size spiral springs. leaf springs. various round flat springs. spring ring pieces, cold drawn steel wire and spring.
2 grades and standards
grade; 60si2mna 60si2cra 50crva 65mn standard: technical agreement.
3 technical conditions of supply
3.1 product specifications
2.5～100×300～3800×c, l
3.2 chemical composition
牌号 | 化学成分% | 其他 | ||||||
c | si | mn | cr | v | p | s | ||
60si2mna | 0.56~0.64 | 1.6~2.0 | 0.7~1.0 | ≤0.35 | - | ≤0.025 | ≤0.025 | ni≤0.35 cu≤0.2 |
60si2cra | 0.56~0.64 | 1.4~1.8 | 0.4~0.7 | 0.7~1.0 | - | ≤0.025 | ≤0.025 | ni≤0.25 cu≤0.12 |
50crva | 0.46~0.54 | 0.17~0.37 | 0.5~0.8 | 0.6~0.8 | - | ≤0.025 | ≤0.025 | ni≤0.35 cu≤0.2 |
65mn | 0.42~0.70 | 0.17~0.37 | 0.9~1.2 | ≤0.25 | - | ≤0.025 | ≤0.025 | ni≤0.25 cu≤0.2 |
3.3 力学性能
牌号 | 拉伸试验 | ||
rel mpa | rm mpa | a % | |
60si2mna | 900~1100 | ≥10 | |
50crva | ≤1200 | ≥8 | |
65mn | ≥695 | ≥410 | ≥11 |