Table 1 — Chemical composition — Cast analysis for product thickness≤120 mm | |||||||
Steel name | % by mass, maximum | ||||||
C | Si | Mn | P | S | bc N | ||
Specified thickness(mm) | |||||||
≤40 | >40≤120 | ||||||
S235JRH | 0.17 | 0.20 | - | 1.40 | 0.040 | 0.040 | 0.009 |
S275J0H | 0.20 | 0.22 | - | 1.50 | 0.035 | 0.035 | 0.009 |
S275J2H | 0.20 | 0.22 | - | 1.50 | 0.030 | 0.030 | - |
S355J0H | 0.22 | 0.22 | 0.55 | 1.60 | 0.035 | 0.035 | 0.009 |
S355J2H | 0.22 | 0.22 | 0.55 | 1.60 | 0.030 | 0.030 | - |
S355K2H | 0.22 | 0.22 | 0.55 | 1.60 | 0.030 | 0.030 | - |
Table 2 — Mechanical properties of non-alloy structural steel hollow section | |||||||||||||
Steel grade | Minimum yield strength ReH | Tensile strength Rm | Minimum elongation A a b | ||||||||||
Mpa | MPa | % | |||||||||||
Specified thickness | Specified thickness | Specified thickness | |||||||||||
mm | mm | mm | |||||||||||
Steel name | ≤16 | >16,≤40 | >40,≤63 | >63,≤80 | >80 ≤100 | >100 ≤120 | ≤3 | >3 ≤100 | >100 ≤120 | ≤ 40 | >40 ≤63 | >63 ≤100 | >100 ≤120 |
S235JRH | 235 | 225 | 215 | 215 | 215 | 195 | 360-510 | 360-510 | 350-500 | 26 | 25 | 24 | 22 |
S275J0H | 275 | 265 | 255 | 245 | 235 | 225 | 430-580 | 410-560 | 400-540 | 23 | 22 | 21 | 19 |
S275J2H | |||||||||||||
S355J0H | 355 | 345 | 335 | 325 | 315 | 295 | 510-680 | 470-630 | 450-600 | 22 | 21 | 20 | 18 |
S355J2H | |||||||||||||
S355K2H |