
卖宝钢弹簧钢250A53高强度耐磨钢250A53盘元
250 a53 steel spring characteristics and scope of application: silicon and manganese increased the strength of the elastic and showed, improve the hardenability, resistance to tempering stability and sagging resistance stability, overheating sensitivity is smaller, but the decarburization tend to be larger, especially silicon and carbon content is high, easy graphitization, carbon steel is brittle. Used in automobile, tractor and motorcycle vibration plate spring and screw, cylinder, valve spring, spring also can be used for under 250 ℃ using hot spring.
250A53弹簧钢化学成份:
碳 C :0.52~0.60
硅 Si:1.50~2.00
锰 Mn:0.60~0.90
硫 S :≤0.035
磷 P :≤0.035
铬 Cr:≤0.35
镍 Ni:≤0.35
铜 Cu:≤0.25
250A53弹簧钢力学性能:
抗拉强度 σb (MPa):≥1274(130)
屈服强度 σs (MPa):≥1176(120)
伸长率 δ10 (%):≥6
断面收缩率 ψ (%):≥30
硬度 :热轧,≤302HB;冷拉+热处理,≤321HB
热处理规范及金相组织:
热处理规范:淬火870℃±20℃,油冷; 回火480℃±50℃(特殊需要时,±30℃)。
金相组织:回火屈氏体。
交货状态:热轧钢材以热处理或不热处理状态交货,冷拉钢材以热处理状态交货。