GB/T700 steel plate

GB/T700 steel plate contains carbon structural steel and low-alloy structural steel for engineering and structural steel, usually without heat treatment. GB/T700 steel is usually produced in hot rolled state, such as hot rolled steel plate, hot rolled steel coil/sheet. GB/T700 steel plate has comprehensive mechanical and welding property. As it shows good performance in structural purposes, GB/T700 steel plate is widely used as welding structural part in manufacturing of ship, railway and vehicles, bridges, boiler, pressure vessel, etc.

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Steel Properties

GB/T700 steel plate chemical composition:

Grade	C	Mn	Si	S	P
Q235A	0.14-0.22	0.30-0.65	0.30	0.050	0.045
Q235B	0.12-0.20	0.30-0.70	0.30	0.045	0.045
Q235C	≤0.18	0.35-0.80	0.30	0.40	0.040
Q235D	≤0.17	0.35-0.80	0.30	0.035	0.035
Q275	0.28-0.38	0.50-0.80	0.35	0.050	0.045

GB/T700 steel plate mechanical properties:

Grade	Yield strength Mpa						Tensile strength
Grade	≤16	16-40	40-60	60-100	100-150	>150	Tensile strength
Q235A	235	225	215	205	195	185	375-500
Q235B	235	225	215	205	195	185	375-500
Q235C	235	225	215	205	195	185	375-500
Q235D	235	225	215	205	195	185	375-500
Q275	275	265	255	245	235	225	490-630

Grade	Elongation %
Grade	≤16	16-40	40-60	60-100	100-150	>150
Q235A	26	25	24	23	22	21
Q235B	26	25	24	23	22	21
Q235C	26	25	24	23	22	21
Q235D	26	25	24	23	22	21
Q275	20	19	18	17	16	15

GB/T700 steel equivalent grades:

EN	USA	DIN	JIS	AFNOR	EN	GB
S355JR	A572 A678Gr.A SSGrade50	St52-3	SM490A SS490	E36-2	Fe510B	Q345B Q345C

Application

GB/T700 steel plate application:
GB/T700 steel plate is used in construction of bridges, highway construction and other engineering construction.

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