GB307788合金结构钢技术条件

1、GB307788合金结构钢技术条件牌号化学成份%CSiMnMoCrNiVTiB40MnB0.37-0.440.17-0.371.10-1.40-0.0005-0.003540MnVB0.37-0.440.17-0.371.10-1.40-0.05-0.10-0.0005-0.003520Cr0.17-0.240.17-0.370.50-0.80-0.70-1.00-40Cr0.37-0.440.17-0.370.50-0.80-0.80-1.10-30CrMo0.26-0.340.17-0.370.40-0.700.15-0.250.80-1.10-35CrMo0.32-0.400.17-0.

2、370.40-0.700.15-0.250.80-1.10-42CrMo0.38-0.450.17-0.370.50-0.800.15-0.250.90-1.20-25Cr2MoVA0.22-0.290.17-0.370.40-0.700.25-0.351.50-1.80-0.15-0.30-1结构钢结构钢公布时刻：2002/08/22文章来源：合金结构钢、碳素结构钢生产历史悠久，钢以精炼方法冶炼，性能优良质量稳固，品种齐全。高质量水平的汽车钢和近年研制开发的经济型剥皮钢，非调质钢、抽油杆用钢，在各行业获得极高信誉。“合金结构钢光亮材”实物质量水平同合金结构钢性能特点：合金结构钢除含碳外，还会

3、有一种或几种合金元素，如硅、锰、钒、钛、硼、镍、铬、钼等，易于淬硬和不易变形，便于通过热处理改善钢的性能。要紧用途：合金结构钢广泛用于制造汽车、拖拉机、船舶、汽轮机、重型机床等各种传动件和紧固件，如齿轮、连杆、各类工具等。相似牌号化学成份力学性能牌号AISIJISDINCSiMnMoCrNi6S(Mpa)6b(Mp)5(%)5I(%)Ak(J)20Cr5120SCr42020Cr40.18-0.240.17-0.370.50-0.800.07-1.0054083510404740Cr5140SCr44041Cr40.37-0.440.17-0.370.50-0.800.08-1.1078509

4、809454720CrMo4118SCM42020CrMo40.17-0.240.17-0.370.40-0.700.15-0.250.08-1.10685088512507835CrMo4135SCM43534CrMo40.32-0.400.17-0.370.40-0.700.15-0.250.09-1.2083598012456342CrMo4140SCM44042CrMo40.38-0.450.17-0.370.50-0.800.15-0.250.09-1.20930408012456340CrMnMo4142SCM44042CrMo40.37-0.450.17-0.370.90-1.2

5、00.15-0.250.09-1.2078598010456320CrMn5120SmnC42020MnCr50.17-0.230.17-0.370.90-1.200.09-1.2073593010454720CrMnTi0.17-0.230.17-0.370.80-1.101.00-1.30(Ti)0.04-0.10835408010455520MnVB0.17-0.230.17-0.371.20-1.60(V)0.07-0.12(B)0.0005-0.0035885408010455538CrMoAISmnC6450.35-0.421.30-1.600.15-0.251.35-1.65(Al)0.70-1.01835980145071牌号要紧作途20Cr凹轮轴，小拖拉机传动齿轮，较重要渗碳件40Cr螺杆，连杆，进气阀螺栓，重要齿轮，轴20CrMo制作连杆、齿轮等35CrMo大断面轴，齿轮，电机转子42CrMo大齿轮，增压器传动齿轮，石油深井打捞工具40CrMnMo高级调质钢，航空发动机轴及结构件20C