GB Standard H-beam Product Catalog Structural SteelPipe SteelTubes Standard Structural SteelPipe SteelTubes H-beam(GB Standard) GB-11263-2024(Section Types) Q235 B/C/DQ275 B/C/DQ345 B/C/D/EQ355 B/C/D/NB/NC/ND/MD/MEQ390 B/C/D/E/G Q420BQ460C GB-1591-2024(Steel Grades) Number of StandardGradeElongation After Fracture(%)Impact Test J for KV or J/cm2 for KCUGB/T 1591-2024Q355BA≥22(-20) (t2≤40 mm)A≥21(-19) (40＜t2≤63 mm)A≥20(-18) (63＜t2≤100 mm)A≥18(-18) (100＜t2≤150mm)A≥17(-17) (150＜t2≤400mm)20℃ KV2≥34 (horizontal)20℃ KV2≥27 (vertical)Q355MBA≥2220℃ KV2≥34 (horizontal)20℃ KV2≥27 (vertical)Q355NBA≥22 (t2≤63 mm)A≥21 (63＜t2≤250 mm)20℃ KV2≥34 (horizontal)20℃ KV2≥27 (vertical) Number of Standard GradeTensile Strength (Rm/Mpa)GB/T 1591-2024Q355B 470～630 (t2≤100mm) 450～600 (100＜t2≤150mm) 450～600 (150＜t2≤250mm) Q355MB 470～630 (t2≤40mm) 450～610 (40＜t2≤63mm) 440～600 (63＜t2≤80mm) 440～600 (80＜t2≤100mm) 430～590 (100＜t2≤120mm)Q355NB 470～630 (t2≤100mm) 450～600 (100＜t2≤200mm) 450～600 (200＜t2≤250mm) GB/T 34103 Yield Strength ReH/MPa /MPaGrade/LevelA级D级E级F级315AH32DH32EH32FH32355AH36DH36EH36FH36390AH40DH40EH40FH40420AH420DH420EH420FH420460AH460DH460EH460FH460500AH500DH500EH500FH500 Share to: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on WhatsApp (Opens in new window) WhatsApp Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email
