1、0.20.4510.080.350.220.41.050.070.4TU42CR0.61.150.651.2TU48-C0.651.250.10.350.240.61.30.090.4TU48CR 2)11.50.150.50.951.60.130.55TU52-C 2)1)如果(Cu+10Sn)含量不超过0.55%,则锡含量可以超过0.03%,最大可至0.04%。2)钢管厚度超过16mm时,C含量熔炼分析值可达0.22%,成品钢管可达0.24%。表2 钼和铬-钼合金钢牌号和化学成分CNiCrMoTU15D3熔炼 2)0.120.20.50.80.150.350.30.30.250.35成品
2、2)0.10.220.40.90.10.40.40.210.39TU15CD2-050.10.180.50.90.40.650.450.60.080.20.410.050.40.30.750.410.64TU10CD5-050.150.30.60.510.450.650.170.20.70.451.050.91.60.410.69TU10CD9-100.10.522.50.91.10.050.551.92.60.851.152)对该牌号,铝的最大含量不应超过0.025%。表3 铬-钼合金钢牌号和化学成分NbVTU212CD5.050.15460.170.10.553.96.1TU210CD90
3、.2518100.21.057.910.15TU210CDNbV9.20.81.30.20.658.510.50.30.550.20.40.71.40.150.78.410.650.350.60.180.43表4 非合金钢管的力学性能标准热处理 3)力学性能,Mpa冲击功KcvJ(0时)20时 1)指定的性能 2)基准温度,RmRp0.2A,% 1)250275300325350375400425450475平均单个正火360460220Rm(A-2)10500Rp0.21571421271221181151131101083224R 104h19110383105h9878644105102
4、35R p0.2 4)186167152147137134132退火R 104h9342052018188674705702162011761621544028TU48-CR47059030424549061074TU52-C51063020mm:310 20mm:2362252142061901701451)这种条件可以保证本表中所列牌号的纵向伸长率至少等于16%。2)Rp0.2取最小值,R取平均值。3)按标准规定要求。4)如果进行验证保持载荷5min,则保证值应减少20MPa。表5 钼和铬-钼合金钢管的力学性能标准热处理A,% 500525550575600625875/925空气4305
5、5026522Rm=(A-2)10500172-69R 105h53311 105h41875/925空气+625/700回火440570196-175343294-88491 105h72-39TU10CD5.05a) 900/950并按最大100/h冷至70044059069R 105h-1814434b) 900/950空气+650/775回火20255117TU10CD9.10a) 900/960并按最大100/h冷至70041056014659395429b) 910/960空气+650/775回火4906401391007336-291)圆括弧中的数值系直接给定的。2)Rp0.2取
6、最小值,1和R取平均值。表6 铬-钼合金钢管的力学性能20时指定的性能 1)R mR p0.2650TUZ12CD5-05205Rp0.2最小1491441411311301028146-155-123957555423023b) 900/950空冷+680/780回火52064028022460TUZ10CD9900/950并按最大100/h冷至700160158155150143140136120-114-91252118TUZ10CDNdV9.2 2)1050/1125空冷+760/820回火 3)59071039016330310290260240-280-25051-210351)1
7、和R取平均值圆括弧中的数值系直接给定的。2)为管理按法国规程制造和修理压力容器时的焊接操作,曾修改了1978年3月24日法令,使用此牌号钢时,应遵照该法令第15条规定事先协议。3)如果钢管是通过热挤压后和热加工制成的,假如热挤压的终点温度在1050和1180之间,则760/820回火已足够。任何情况下,回火的确切温度都应根据炉号来确定。表7 弹性模量 MPa温度20100200300400500600205000200000195000185000175000165000155000TU42-C-TU42CRTU48-C-TU48CRTU15CD2.05215000210000TUZ10CDN
8、bV9-2表8 平均线膨胀系数 1) 10 -5 m/(m.)在20和以下一种温度之间70011.112.112.913.513.914.110.911.311.712.412.71)10-6m/(m.)=10-6 K-2表9 热导率 W/(m.k)524348453837332726表10、表1和表2中各牌号的热轧钢管的尺寸和单位长度的重量直径D类别,mm厚度 T,mm2.32.62.93.23.644.555.66.37.188.81012.550123单位长度重量,kg/m26.91.561.721.872.072.262.492.71.761.942.112.342.562.833.0831.82.52.743.033.333.71.781.992.22.412.672.933.243.543.884.264.662.272.512.753.053.353.724.074.474.935.4142.42.552.823.093.443.794.214.615.085.616.186.797.2944.52.692.983.263.634.444.875.375.946.557.27.758.5148.33.253.563.974.374.865.345.96.537.217.958.579.453.1
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