Q370qC, Q370qD, and Q370qE steel plates for bridges

Q370qC, Q370qD, and Q370qE steel materials are structural steel plates for bridges. The Q370 series bridge steel plate has high strength, toughness, and bears loads and impacts of rolling stock, and has good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance.
Q370qC, Q370qD, and Q370qE 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, D, E—quality grade is C, D, E.

Q370qC, Q370qD, and Q370qE steel composition(%)

Grades	C	Si	Mn	P	S	Nb	V	Ti	Cr	Ni	Cu	Mo	B	N	Als
				Max.											Min.
Q370qC	≤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
Q370qD	≤0.18	≤0.55	1.00-1.70	0.025	0.02
Q370qE	≤0.18	≤0.55	1.00-1.70	0.02	0.01

Q370qC, Q370qD, and Q370qE steel mechanical properties

Grades	Tensile test				V-shaped impact test
	Yield strength /MPa		Tensile strength /MPa	Elongation A%	Test temperature /℃	Shock absorption energy/J
	Thick/mm
	≤50	50-100
	Max.					Min.
Q370qC, Q370qD, Q370qE	370	360	510	20	0	47
					-20
					-40

Grade Q370qC, Q370qD, Q370qE steel plate application range
Q370qC, Q370qD, and Q370qE plates are structural steel plates for bridges. The steel for tie-welded bridges should also have good welding performance and low notch sensitivity, and is mainly used to make riveted and bolt-welded road bridges and railway bridges (including cross-sea bridges).

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