S355JR是符合欧标EN10025的低合金高强度结构钢。S355JR在中国钢材是低合金高强度结构钢，硬度为70-80B，屈服强度在300-400MPa之间。S355JR化学成分:C:≤0.22;Si:≤0.55;Mn:≤1.60;P:≤0.025;S:≤0.025S355JR相当于国内的Q345BS355J0相当于国内的Q345CS355J2相当于国内的Q345DS355K2相当于国内的Q345EHE(不等边不等厚）欧标H型钢规格表型号规格米重厂型号规格米重HE100AA91*100*4.2*5.512.2HE400AA378*300*9.5*1392.4HE100A96*100*5*816.7LHE400A390*300*11*19125HE100B100*100*6*1020.4LHE400B400*300*13.5*24155HE100M120*106*12*2041.8HE400M432*307*21*40256HE120AA109*120*4.2*5.514.6HE450*123435*300*10.2*18.5100HE120A114*120*5*819.9LHE450AA425*300*10*13.599.7HE120B120*120*6.5*1126.7LHE450A440*300*11.5*21140HE120M140*126*12.5*2152.1HE450B450*300*14*26171HE140AA128*140*4.3*618.1HE450M478*307*21*40263HE140A133*140*5.5*8.524.7LHE500AA472*300*10.5*14107HE140B140*140*7*1233.7LHE500A490*300*12*23155HE140M160*146*13*2263.2HE500B500*300*14.5*28187HE160AA148*160*4.5*723.8HE500M524*306*21*40270HE160A152*160*6*930.4HE550AA522*300*11.5*15120HE160B160*160*8*1342.6HE550A540*300*12.5*24166HE160M180*166*14*2376.2HE550B550*300*15*29199)