Low alloy structural Q345 high strength steel plate

Q345 high strength steel plate is usually produced in hot rolled state. Q345 high strength steel plate has comprehensive mechanical and welding property. As it shows good performance in structural purposes, Q345 high strength steel plate is widely used as welding structural part in manufacturing of ship, railway and vehicles, bridges, boiler, pressure vessel container, steel oil tank, etc. Yield point of Q345 high strength steel plate decreases as plate thickness increases.

Q345 high strength steel plate covers Q345A steel plate, Q345B steel plate, Q345C steel plate, Q345D steel plate, Q345E steel plate.

Q345 high strength steel plate chemical composition:

Grade	C≤	Mn≤	Si≤	P≤	S≤	V≤	Nb≤	Ti≤	Cr≤	Ni≤	Cu≤	N≤	Mo≤	B	Als≥
Q345A	0.20	1.70	0.50	0.035	0.035	0.15	0.07	0.20	0.30	0.50	0.30	0.012	0.10	-	-
Q345B	0.20	1.70	0.50	0.035	0.035	0.15	0.07	0.20	0.30	0.50	0.30	0.012	0.10	-	-
Q345C	0.20	1.70	0.50	0.030	0.030	0.15	0.07	0.20	0.30	0.50	0.30	0.012	0.10	-	0.015
Q345D	0.18	1.70	0.50	0.030	0.025	0.15	0.07	0.20	0.30	0.50	0.30	0.012	0.10	-	0.015
Q345E	0.18	1.70	0.50	0.025	0.020	0.15	0.07	0.20	0.30	0.50	0.30	0.012	0.10	-	0.015

Q345 high strength steel plate min. yield strength:

Thk (mm)	To 16	16-40	40-63	63-80	80- 100	100-150	150-200	200-250	250-400
Q345A	345	335	325	315	305	285	275	265	-
Q345B	345	335	325	315	305	285	275	265	-
Q345C	345	335	325	315	305	285	275	265	-
Q345D	345	335	325	315	305	285	275	265	265
Q345E	345	335	325	315	305	285	275	265	265

Q345 high strength steel plate tensile strength:

Thk (mm)	To 40	40-63	63-80	80- 100	100-150	150-250	250-400
Q345A	470-630	470-630	470-630	470-630	450-600	450-600	-
Q345B	470-630	470-630	470-630	470-630	450-600	450-600	-
Q345C	470-630	470-630	470-630	470-630	450-600	450-600	-
Q345D	470-630	470-630	470-630	470-630	450-600	450-600	450-600
Q345E	470-630	470-630	470-630	470-630	450-600	450-600	450-600

Q345 high strength steel plate elongation (≥):

Thk (mm)	To 40	40-63	63-100	100-150	150-250	250-400
Q345A	20	19	19	18	17	-
Q345B	20	19	19	18	17	-
Q345C	21	20	20	19	18	-
Q345D	21	20	20	19	18	17
Q345E	21	20	20	19	18	17

Q345 high strength steel plate impact test temperature and energy:

Grade	Test Temperature	Min. absorbed energy
Grade	Test Temperature	12mm-150mm	150mm-250mm	250mm-400mm
Q345A	-	-	-	-
Q345B	+20℃	≥34J	≥27J	-
Q345C	0℃	≥34J	≥27J	-
Q345D	-20℃	≥34J	≥27J	≥27J
Q345E	-40℃	≥34J	≥27J	≥27J

Q345 high strength steel plate application:
Q345 high strength steel plate is low alloy structural steel with good mechanical properties, low temperature performance, plasticity and good weldability. Q345 high strength steel plate is mostly used in low pressure vessel, oil tank, vehicles, cranes, mining machinery, power stations, mechanical parts, building structure, general metal parts.

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