SNCM439合金结构钢:
化学成份:
碳 C :0.36~0.43
硅 Si:0.15~0.35
锰 Mn:0.60~0.90
硫 S :允许残余含量≤0.025
磷 P :允许残余含量≤0.025
铬 Cr:0.60~1.00
镍 Ni:1.60~2.00
铜 Cu:允许残余含量≤0.025
钼 Mo:0.15~0.30
力学*能:![QQ图片20161112185927_副本](https://cbu01.alicdn.com/img/ibank/2017/115/614/4639416511_1352143942.jpg)
![wKhQplUnJyeEWGoWAAAAAGuTrdc463](https://cbu01.alicdn.com/img/ibank/2017/188/916/5286619881_1352143942.jpg)
![23708700627_副本](https://cbu01.alicdn.com/img/ibank/2017/436/467/5284764634_1352143942.jpg)
![QQ图片20161112185927_副本](https://cbu01.alicdn.com/img/ibank/2017/115/614/4639416511_1352143942.jpg)
![wKhQplUnJyeEWGoWAAAAAGuTrdc463](https://cbu01.alicdn.com/img/ibank/2017/188/916/5286619881_1352143942.jpg)
![23708700627_副本](https://cbu01.alicdn.com/img/ibank/2017/436/467/5284764634_1352143942.jpg)
抗拉强度 σb (MPa):≥980(100)
屈服强度 σs (MPa):≥835(85)
伸长率 δ5 (%):≥12
断面收缩率 ψ (%):≥55
冲击功 Akv (J):≥78
冲击韧*值 αkv (J/cm2):≥98(10)
硬度 :≤269HB
试样尺寸:试样毛坯尺寸为25mm
热处理规范及金相组织:
热处理规范:淬火850℃,油冷;回火600℃,水冷、油冷。
交货状态:以热处理(正火、退火或高温回火)或不热处理状态交货,交货状态应在合同中注。