Standard I beam carbon steel H beam sizesQ235 Q345 SS400 S235JR S355JR St52
Standard | Grade | Method of Deoxidization | Chemical Components% | ||||||||
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Nb≤ | V≤ | Ti≤ | Als≥ | |||
(Chinese Standard) | Q235B | Z | 0.2 | 0.35 | 1.4 | 0.045 | 0.045 | ||||
Q345B | Z | 0.2 | 0.5 | 1.7 | 0.035 | 0.035 | 0.07 | 0.2 | 0.2 | ||
Q420B | Z | 0.2 | 0.5 | 1.7 | 0.035 | 0.035 | 0.07 | 0.2 | 0.2 | ||
Q420C | Z | 0.2 | 0.5 | 1.7 | 0.03 | 0.03 | 0.07 | 0.2 | 0.2 | 0.015 | |
Q460C | Z | 0.2 | 0.6 | 1.8 | 0.03 | 0.03 | 0.11 | 0.2 | 0.2 | 0.015 | |
JIS Standard | SS400 | Z | 0.05 | 0.05 | |||||||
SS540 | Z | 1.6 | 0.04 | 0.04 | |||||||
EN Standard | S235JR | Z | 0.17 | 1.4 | 0.035 | 0.035 | |||||
S235JO | Z | 0.17 | 1.4 | 0.03 | 0.03 | ||||||
S235J2 | Z | 0.17 | 1.4 | 0.025 | 0.025 | ||||||
S275JR | Z | 0.21 | 1.5 | 0.035 | 0.035 | ||||||
S275JO | Z | 0.18 | 1.5 | 0.03 | 0.03 | ||||||
S275J2 | Z | 0.18 | 1.5 | 0.025 | 0.025 | ||||||
S355JR | Z | 0.24 | 0.55 | 1.6 | 0.035 | 0.035 | |||||
S355JO | Z | 0.2 | 0.55 | 1.6 | 0.03 | 0.03 | |||||
S355J2 | Z | 0.2 | 0.55 | 1.6 | 0.025 | 0.025 | |||||
(ASTM Standard) | A36 | Z | 0.25 | 0.4 | 0.04 | 0.05 | |||||
A572-50 | Z | 0.23 | 0.4 | 1.35 | 0.4 | 0.05 | 0.05 | 0.15 | 0.15 | ||
A572-60 | Z | 0.26 | 0.4 | 1.3 | 0.04 | 0.05 | 0.05 | 0.15 | 0.15 | ||
shipbuilding | A | Z | 0.21 | 0.5 | ≥2.5C | 0.035 | 0.035 | ||||
B | Z | 0.21 | 0.35 | 0.8~1.2 | 0.035 | 0.035 |
Standard | Grade | Mechanical Property | ||||||
(N/MM2) Tensile Strength | (N/MM2) Yield Strength | Percentage Elongation after Fracture | Impact Power | |||||
≤16 | 16~40 | 20℃ | 0℃ | -20℃ | ||||
(Chinese Standard) | Q235B | 370-500 | ≥235 | ≥225 | ≥26 | ≥27 | ||
Q345B | 470-630 | ≥345 | ≥325 | ≥21 | ≥34 | |||
Q420B | 520-680 | ≥420 | ≥400 | ≥18 | ≥34 | |||
Q420C | 520-680 | ≥420 | ≥400 | ≥19 | ≥34 | |||
Q460C | 550-720 | ≥460 | ≥440 | ≥17 | ≥34 | |||
JIS Standard | SS400 | 400-510 | ≥245 | ≥235 | ≥23 | |||
SS540 | ≥540 | ≥400 | ≥390 | ≥17 | ||||
EN Standard | S235JR | 360-510 | ≥235 | ≥225 | ≥26 | ≥27 | ||
S235JO | 360-510 | ≥235 | ≥225 | ≥26 | ≥27 | |||
S235J2 | 360-510 | ≥235 | ≥225 | ≥24 | ≥27 | |||
S275JR | 410-560 | ≥275 | ≥265 | ≥23 | ≥27 | |||
S275JO | 410-560 | ≥275 | ≥265 | ≥23 | ≥27 | |||
S275J2 | 410-560 | ≥275 | ≥265 | ≥21 | ≥27 | |||
S355JR | 470-630 | ≥355 | ≥345 | ≥22 | ||||
S355JO | 470-630 | ≥355 | ≥345 | ≥22 | ||||
S355J2 | 470-630 | ≥355 | ≥345 | ≥22 | ||||
(ASTM Standard) | A36 | 400-550 | ≥250 | ≥250 | ≥23 | |||
A572-50 | ≥450 | ≥345 | ≥345 | ≥21 | ||||
A572-60 | ≥520 | ≥415 | ≥415 | ≥18 | ||||
shipbuilding | A | 400-520 | ≥235 | ≥235 | ≥22 | |||
B | 400-520 | ≥235 | ≥235 | ≥22 | ≥27 |