不锈钢螺栓、螺钉和螺柱的机械性能（GB/T3098.6－2000）性能标记机械性能材料性能等级性能等级螺栓、螺钉和螺柱螺栓、螺钉螺栓和螺母组别化学成份/%类别组别4550607080110组别性能等级螺纹直径d./mm抗拉强度σbmin/N·mm-2规定非比例伸长应力σP0.2min/N·mm-2断后伸长量δminCSiMnPS硬度HVA奥氏体A1－A1-50－A1-70A1-80－A1A2A3A4A550≤395002100.6d－AA1A2A3A4A50.120.10.080.080.08111116.522220.20.050.0450.0450.0450.15~0.350.030.030.030.03A2－A2-50－A2-70A2-80－70≤207004500.4d－A3－A3-50－A3-70A3-80－A4－A4-50－A4-70A4-80－CC1C3C40.09~0.150.17~0.250.08~0.15111111.50.050.040.060.030.030.15~0.3580≤248006000.3d－A5－A5-50－A5-70A5-80－FF10.12110.040.03C马氏体C1－C1-50－C1-70－C1-110507011050070011002504108200.2d0.2d0.2155~2202203~30350~44CrMoNiCuAA116~190.75~101.75~2.25A215~20－8~194