gt;30~50±0.3gt;3~20±10%2力学性能标准牌号抗拉强度(MPa)屈服强度(MPa)伸长率(%)硬度GB308710335~475≥195≥24/20410~550≥245≥20/GB531020G410~550≥245≥24/20MnG≥415≥240≥22/25MnG≥485≥275≥20/15CrMoG440~0≥235≥21/12Cr2MoG450~600≥280≥20/12Cr1MoVG470~0≥255≥21/12Cr2MoWVTiB540~735≥345≥18/10Cr9Mo1VNb≥585≥415≥20/ASMESA210SA210A-1≥415≥255≥30≤143HBSA210C≥485≥275≥30≤179HBASMESA213SA213T11≥415≥205≥30≤163HBSA213T12≥415≥220≥30≤163HBSA213T22≥415≥205≥30≤163HBSA213T23≥510≥400≥20≤220HBSA213T91≥585≥415≥20≤250HBSA213T92≥620≥440≥20≤250HBDIN17175ST48/Ⅲ410~530≥255≥21/15Mo3450~600≥270≥22/13CrMo44440~590≥290≥22/10CrMo910480~630≥280≥20/3化学成分标准牌号化学成分(%)CSiMnPSCrMoCuNiVAlWTiNbNGB3087100.07~0.130.17~0.370.38~0.65≤0.030≤0.0300.3~0.65/≤0.25≤0.30//200.17~0.230.17~0.370.38~0.65≤0.030≤0.0300.3~0.65/≤0.25≤0.30//GB531020G0.17~0.240.17~0.370.35~0.65≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.0820MnG0.17~0.240.17~0.370.70~00≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.0825MnG0.18~0.240.17~0.370.80~10≤0.030≤0.030≤0.25≤0.15≤0.20≤0.25≤0.0815CrMo0.12~0.180.17~0.370.40~0.70≤0.030≤0.0300.80~100.40~0.55≤0.20≤0.3012Cr2MoG0.08~0.15≤0.500.40~0.70≤0.030≤0.03000~500.90~20≤0.20≤0.3012Cr1MoV0.08~0.150.17~0.370.40~0.70≤0.030≤0.0300.90~200.25~0.35≤0.20≤0.300.15~0.3012Cr2MoWVTiB0.08~0.150.45~0.750.45~0.65≤0.030≤0.03060~100.50~0.65≤0.20≤0.300.28~0.420.30~0.550.08~0.15B0.002~0.00810Cr9Mo1VNb0.08~0.120.20~0.500.30~0.60≤0.020≤0.01000~500.85~05≤0.20≤0.400.18~0.25≤0.0150.06~0.100.03~0.07ASMESA210SA210A-10.13~0.19≥0.10.45~0.65≤0.030≤0.030SA210C0.18~0.24≥0.10.80~10≤0.030≤0.030ASMESA213SA213T110.05~0.150.50~00.30~0.60≤0.030≤0.03000~500.50~00SA213T120.05~0.15≤0.500.30~0.61≤0.030≤0.0300.80~250.44~0.65SA213T220.05~0.15≤0.500.30~0.60≤0.030≤0.01090~600.87~13SA213T230.04~0.10≤0.500.10~0.60≤0.030≤0.03090~600.05~0.30≤0.03045~75B0.0005~0.0060.02~0.08≤0.040SA213T910.08~0.120.20~0.500.30~0.60≤0.020≤0.01000~500.85~05≤0.400.18~0.25≤0.0150.06~0.100.03~0.07SA213T920.07~0.13≤0.500.30~0.60≤0.020≤0.01050~500.30~0.60≤0.400.15~0.25≤0.01550~00B0.001~0.0060.04~0.090.03~0.07DIN17175ST48/Ⅲ≤0.210.10~0.350.40~20≤0.040≤0.04015Mo30.12~0.200.10~0.350.40~0.80≤0.035≤0.0350.25~0.3513CrMo440.10~0.180.10~0.350.40~0.70≤0.035≤0.0350.70~100.45~0.6510CrMo9100.08~0.15≤0.500.30~0.70≤0.025≤0.02000~500.90~10≤0.30≤0.30≤0.015合金管理论计算:(外径-壁厚)*壁厚*0.02483=每米的重量。哪有i表1T91钢的化学成份%S高压锅炉管使用时经常处于高温和高压条件
第1条
试验A冷拔(轧)无缝钢管:圆圆管坯→加热→穿孔→打头→退火→酸洗→涂油(镀铜)→多道次冷拔(冷轧)→坯管→热处理→矫直→水压试验(探伤)→标记→入库。r日喀则康马县冷拔管钢管外径(mm)允许偏差(mm)钢管壁厚(mm)允许偏差(mm)为了降低T91钢焊接接头的残余应力。
第2条必须其冷却速度小于5℃/min。T91钢的焊接工艺可用3表示。C衡水按照国际焊接学会推荐的碳当量公式算得T91的碳当量为Bd按照国际焊接学会推荐的碳当量公式算得T91的碳当量为3软化层的产生
优点可以回收。
第3条未来我国高压合金管长材的需求年均增长可达。10-12%。n锅炉管采用钢号优质碳素结构钢钢号有2020Mn25MnG。V加入钼主要是为了提高钢的热强性。
管子在高温烟气日喀则康马县45#610*18无缝钢管便于储存和水蒸气的作用下,会发生氧化和腐蚀。要求钢管具有高的持久强度,高的抗氧化腐蚀性能,并有良好的组织稳定性。T91焊后回火恒温时间不少于1h,才能保证其组织完全