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1、不同牌号碳结钢的化学成分表序号代号牌号化学成分.%CSiMnCrNiCu不大于1U2008008F0.05O.110.030.250.500.100.300.252U2010010FO.070.130.07O.250.500.150.300.253U2015015F0.120.180.07O.250.500.25O.300.254U20082080.050.110.170.37O.350.650.10O.300.255U2010210O.07O.130.170.37O.350.65O.15O.300.256U20152150.120.18O.170.370.350.65O.25O.300.25
2、7U20202200.170.230.170.37O.350.65O.25O.300.258U2025225O.220.29O.170.370.500.80O.250.300.259U20302300.270.340.170.37O.500.80O.25O.300.2510U20352350.320.39O.170.370.500.80O.25O.300.2511U20402400.370.44O.170.370.500.800.Z5O.300.2512U2045245O.42O.50O.170.370.500.80O.25O.300.2513U2050250O.470.55O.170.37O
3、.500.80O.25O.300.2514U2055255O.520.600.170.370.500.80O.250.300.2515U2060260O.570.650.170.370.500.800.25O.300.2516U20652650.620.70O.170.370.500.80O.25O.300.2517U2070270O.670.75O.170.370.500.800.250.300.2518U2075275O.720.800.170.370.500.80O.250.300.2519U2080280O.770.85O.170.370.500.800.250.300.2520U20
4、85285O.820.900.170.370.500.800.25O.300.2521U2115215MnO.120.180.170.37O.701.000.25O.300.2522U2120220Mn0.170.230.170.370.70I.000.25O.300.2523U2125225Mn0.220.290.170.37O.701.00O.25O.300.2524U2130230MnO.270.340.170.37O.701.00O.25O.300.2525U2135235M13O.320.390.170.37O.701.00O.250.300.2526U2140240M13O.370
5、.440.170.370.701.000.25O.300.2527U2145245MnO.420.50O.170.37O.701.000.25O.300.2528U2150250Mn0.480.560.170.37O.701.00O.25O.300.2529U2160260Mn0.57O，650.170,37O.701.00O.25O.300.2530U2165265M13O.620.700.170.37O.901.20O.25O.300.2531U2170270M130.670.750.170.37O.901.20O.25O.300.25 注：表1所列牌号为优质钢。如果是高级优质钢，在牌号后面加“A”（统一数字代号最后一位数字改为“3”）；如果是特级优质钢，在牌号后面加。E”（统一数字代号最后一位数字改为“6”）；对于沸腾钢，牌号后面为“F” （统一数字代号最后一位数字为“0”）；对于半镇静钢，牌号后面为“b”（统一数字代号最后位数字为“1”）
不同牌号碳结钢的化学成分表
