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:≤0.025
S355JR 相当于国内的 Q345B
S355J0 相当于国内的 Q345C
S355J2 相当于国内的 Q345D
S355K2(NL) 相当于国内的 Q345E
S355ML 执行标准是EN10025-4 热机械轧制可焊接细晶粒结构钢S355NL 执行标准是正火/正火轧制可焊接细晶粒结构钢 M 和N主要是生产工艺的不同。L 表示材质在固定低温度不低于-50°时规定冲击功小值
| UC356*368*153 | 362*370.5*12.3*20.7 | 152.9 |
| UC356*368*177 | 368.2*372.6*14.4*23.8 | 177 |
| UC356*368*202 | 374.6*374.7*16.5*27 | 201.9 |
| UC356*406*235 | 381*394.8*18.4*30.2 | 235.1 |
| UC356*406*287 | 393.6*399*22.6*36.5 | 287.1 |
| UC356*406*340 | 406.4*403*26.6*42.9 | 339.9 |
| UC356*406*393 | 419*407*30.6*49.2 | 393 |
| UC356*406*467 | 436.6*412.2*35.8*58 | 467 |
| UC356*406*509 | 446*416*39.1*62.7 | 509 |
| UC356*406*551 | 455.6*418.5*42.1*67.5 | 551 |
| UC356*406*592 | 465*421*45*72.3 | 592 |
| UC356*406*634 | 474.6*424*47.6*77 | 633.9 |
| UC356*406*677 | 483*428*51.2*81.5 | 677 |
| UC356*406*744 | 498*432*55.6*88.9 | 744 |
| UC356*406*818 | 514*437*60.5*97 | 818 |
| UC356*406*900 | 531*442*65.9*106 | 900 |
| UC356*406*990 | 550*448*71.9*115 | 990 |
| UC356*406*1086 | 569*454*78*125 | 1086 |
| UC356*406*1202 | 580*471*95*130 | 1202 |
| UC356*406*1299 | 600*476*100*140 | 1299 |
| UC152*152*23 | 152.4*152.2*5.8*6.8 | 23 |
| UC152*152*30 | 157.6*152.9*6.5*9.4 | 30 |
| UC152*152*37 | 161.8*154.4*8*11.5 | 37 |
| UC203*203*46 | 203.2*203.6*7.2*11 | 46.1 |
| UC203*203*52 | 206.2*204.3*7.9*12.5 | 52 |
| UC203*203*60 | 209.6*205.8*9.4*14.2 | 60 |
| UC203*203*71 | 215.8*206.4*10*17.3 | 71 |
| UC203*203*86 | 222.2*209.1*12.7*20.5 | 86 |
| UC254*254*73 | 254.1*254.6*8.6*14.2 | 73 |
| UC254*254*89 | 260.3*256.3*10.3*17.3 | 88.9 |
| UC254*254*107 | 266.7*258.8*12.8*20.5 | 107.1 |
| UC254*254*132 | 276.3*261.3*15.3*25.3 | 132 |
| UC254*254*167 | 289.1*265.2*19.2*31.7 | 167.1 |
| UC305*305*97 | 307.9*305.3*9.9*15.4 | 96.9 |
| UC305*305*118 | 314.5*307.4*12*18.7 | 117.9 |
| UC305*305*137 | 320.5*309.2*13.8*21.7 | 136.9 |
| UC305*305*158 | 327.1*311.2*15.8*25 | 158.1 |
| UC305*305*198 | 339.9*314.5*19.1*31.4 | 198.1 |
| UC305*305*240 | 352.5*318.4*23*37.7 | 240 |
| UC305*305*283 | 365.3*322.2*26.8*44.1 | 282.9 |
| UC356*368*129 | 355.6*368.6*10.4*17.5 | 129 |
