混凝土强度等级a1卩18cu普通钢筋牌号300335400500C501.000.800.003300.5760.5500.5180.482C550.990.790.003250.5660.5410.5080.473C600.980.780.003200.5560.5310.4990.464C650.970.770.003150.5470.5220.4900.455C700.960.760.003100.5370.5120.4810.447C750.950.750.003050.5280.5030.4720.438C800.940.740.003000.5180.4930.4630.429