Q345 Carbon structure steel tube,Carbon steel tube,Carbon steel pipe,A572 Carbon steel pipe,A572 Carbon steel tube, Welded pipe, Seamless pipe, Q345B/16Mn seamless steel pipe,Q345 seamless steel pipe

Q345/ A572 Carbon steel tube/pipe

Q345 steel is one kind of Chinese standardized low alloy, medium tensile strength steel made with a hot-rolling process, used for a number of manufacturing purposes. To some extent, the Q345 possesses the same property and composition of ASME A572, namely the Q345 is equivalent to A572.

Q345 has good comprehensive mechanical properties, low temperature performance, good plasticity and weldability. It is used as the structure, mechanical parts, building structure, general metal structural parts, heat, etc. bearing dynamic load for medium and low pressure vessels, oil tanks, vehicles, cranes, mining machinery, power stations, bridges, etc Used in rolling or normalizing state, it can be used for various structures in cold area below – 40 ℃.

Product Details

Product Name	Carbon Steel Tube/Pipe
Dia.	15-1200mm
Length	3m -12m or as required
Thickness	0.5-26.5mm for ERW, 4.0-80mm for SMLS
Standard	GB,ASTM,DIN,BS,JIS
Technique	Cold / Hot rolled
Surface Treatment	3PE/Fusion bond Expoxy Coating / Black Oil Coating as per customer's requirement
Thickness Tolerance	±0.01mm~ ±0.25mm
Material	Q345
Application	Bridges, vehicles, ships, buildings, pressure vessels, etc.
MOQ	1 ton , We can accept sample order.
Shipment Time	Within 15-20 workdays after receiving deposit or workable L/C
Export Packing	Waterproof paper, and steel strip packed. Standard Export Seaworthy Package.Suit for all kinds of transport,or as required
Capacity	250,000 tons/year

Grade classification of Q345:

Q345 can be divided into Q345A, Q345B, Q345C, Q345D and Q345E by grade. What they represent is that the impact temperature is different. Q345A, no impact; Q345B, impact at 20 ° normal temperature; Q345C, 0 degree impact; Q345D, is – 20 degree impact; Q345E, is – 40 degree impact. At different impact temperature, the impact value is different.

Q345 Chemical Composition:

Grade	C	Si	Mn	P	S	V	Nb	Ti	AL
Grade	≤%	≤%	≤%	≤%	≤%	%	%	%	≥%
Q345A	0.20	0.55	1.70	0.045	0.045	0.02-0.15	0.015-0.060	0.02-0.20	/
Q345B	0.20	0.55	1.70	0.040	0.045	0.02-0.15	0.015-0.060	0.02-0.20	/
Q345C	0.20	0.55	1.70	0.035	0.035	0.02-0.15	0.015-0.060	0.02-0.20	0.015
Q345D	0.18	0.55	1.80	0.030	0.030	0.02-0.15	0.015-0.060	0.02-0.20	0.015
Q345E	0.18	0.55	1.80	0.025	0.025	0.02-0.15	0.015-0.060	0.02-0.20	0.015

Q345 Physical properties :

Grade	Tensile strength (MPa)	Yield strength (MPa)	Elongation δ5≥(%)
Grade	Tensile strength (MPa)	Yield strength (MPa)	Elongation δ5≥(%)
Q345A (thickness≦16mm)	470-630	345	21
Q345B(thickness≦16mm)	470-630	345	21
Q345C(thickness16-35mm)	470-630	≥325	22
Q345D(thickness35-50mm)	490-675	≥295	22
Q345E(thickness50-100mm)	490-675	≥275	22

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