Q370qC material is a Chinese structural steel grade for bridges. It has high strength, toughness, and can withstand the load and impact of rolling stock, and must have good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. The Q370qC steel for tie-welding bridges should also have good welding performance and low notch sensitivity.
Q370qC steel meaning
Q—The first letter of the Chinese pinyin of "qu" for the yield point of bridge steel;
370—Yield point value, unit Mpa;
q—The first letter of the Chinese pinyin of "bridge" in bridge steel;
C —C indicates the steel quality level like D, E.
Q370qC steel composition(%)
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
Mo |
B |
N |
Als |
|
Max. |
Min. |
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|
≤0.18 |
≤0.55 |
1.00-1.70 |
0.03 |
0.025 |
0.06 |
0.08 |
0.03 |
0.8 |
0.5 |
0.55 |
0.2 |
0.004 |
0.012 |
0.015 |
Q370qC steel mechanical properties
Tensile test |
V-shaped impact test |
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|
Yield strength, MPa |
Strength strength, MPa |
Elongation, A% |
Test temperature/℃ |
Shock absorption energy/J |
|
|
Thickness, mm |
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|
≤50 |
50-100 |
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|
Min. |
Min. |
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|
370 |
360 |
510 |
20 |
0 |
47 |
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