大芭蕉天天视频在线观看

 

GB5310高压锅炉用无缝钢管

信息编辑:无缝钢管厂http://xxxfact.com
 

,

GB3087-1999  GB5310-1995热轧、挤压、扩管)

壁厚允许偏差
标准壁厚(S)壁厚允许偏差
GB3087-199920+15%,-12.5%(最小为+0.45mm,-0.35mm)
>20±12.5%
GB5310-1995<3.5< td="">+15%(最小为+0.48mm)
-10%(最小为+0.32mm)
3.5-20+15%,-10%
>20D<219< td="">±10%
D219+12.5%,-10%
外径允许偏差
标准外径(D)外径允许偏差
GB3087-1999≤159±1.0%(最小为±0.5mm)
>159±1.0%
GB5310-1995≤159±1.0%(最小为±0.5mm)
>159±1.0%
 纵向力学性能
标准牌号抗拉强度(MPa)屈服点MPa)伸长率%) 冲击功(J)
GB3087-199910333-47519624-
20392-588245/22620-
GB5310-199520G410-5502452435
20MnG≥4152402235
25MnG≥4852752035
15MoG450-6002702235
20MoG≥4152202235
12CrMoG410-5602052135
15CrMoG440-6402352135
12Cr2MoG450-6002802035
12Cr1MoVG470-6402552135
12Cr2MoWVTib540-7353451835
化学成份
标准牌号CSiMnPS≤CrMoVTiBW
GB3087-1999100.07-0.140.17-0.370.35-0.650.0350.035≤0.15-----
200.17-0.240.17-0.370.35-0.650.0350.035≤0.25-----
GB5310-199520G0.17-0.240.17-0.370.35-0.650.0300.030------
20MnG0.17-0.240.17-0.370.70-1.000.0300.030------
25MnG0.22-0.300.17-0.370.70-1.000.0300.030------
15MoG0.12-0.200.17-0.370.40-0.800.0300.030-0.25-0.35----
20MoG0.15-0.250.17-0.370.40-0.800.0300.030-0.44-0.65----
12CrMoG0.08-0.150.17-0.370.40-0.700.0300.0300.40-0.700.40-0.55----
15CrMoG0.12-0.180.17-0.370.40-0.700.0300.0300.80-1.100.40-0.55----
12Cr2MoG0.08-0.150.500.40-0.700.0300.0302.00-2.500.90-1.20----
12Cr1MoG0.08-0.150.17-0.370.40-0.700.0300.0300.90-1.200.25-0.350.15-0.30---
12Cr2MoWVTiB0.08-0.150.45-0.750.45-0.650.0300.0301.60-2.100.50-0.650.28-0.420.08-0.180.002-0.180.30-0.55