Q345 Seamless Steel Pipes

Tianjin Wanlei Steel Pipe Co., Ltd. is one of the leading manufacturers and suppliers of q345 seamless steel pipes in China, featured by quality products and low price. If you're going to wholesale durable q345 seamless steel pipes made in China, welcome to get pricelist and free sample from our factory.

 

Introduction of Grade Q345

Grade Q345 is a kind of low alloy steel, which has good mechanical properties, low temperature resistance and welding performance. Q345 represents its yield strength, so Q345 means that the yield strength of this steel material is 345 Mpa. Compared with Q235, Grade Q345 is belong to low alloy steel, while grade Q235 is belong to common carbon steel.

Grade Q345 main include five levels: Q345A, Q345B, Q345C, Q345D and Q345E. The suffix letter represents the different temperatures of impact test. Such as Q345A means that no impact; Q345B means that 20℃normal temperature impact; Q345C means that 0℃ impact; Q345D means that -20℃ impact; Q345E means that -40℃ impact.

 

Chemical composition %

Grade	Level	C,max	Si,max	Mn,max	P,max	S,max	V,max	Cr,max	Mo,max
Q345	A	0.20	0.50	1.70	0.035	0.035	-	0.30	0.10
	B				0.035	0.035
	C				0.030	0.030	0.15
	D	0.18			0.030	0.025
	E				0.025	0.020

 

Mechanical properties

Grade	Level	Tensile strength(Mpa)	Yield strength,min(Mpa)	Elongation,min(%)	Impact
					Temperature	Energy(J)
Q345	A	470-630	345	20	-	-
	B				20℃	34
	C			21	0℃
	D				-20℃
	E				-40℃	27

 

Product show

Q345B seamless steel pipes

 

Applications

Due to its high strength and excellent mechanical properties, Q345 seamless steel pipes is widely used in buildings, ships, pressure vessels, and bridges, etc.

 

About us

 

FAQ

Q: Are you a manufacturer or supplier?

A: We are a supplier, and we are specializing in steel pipes for many years. We have rich export experience for steel pipes.

Q: Can you provide some samples before order? Any charge?

A: Yes, we can provide free samples for you so that you can understand our products. But the transportation costs not be included.

Q: Can you accept small order?

A: Yes, small order and trial order can be accepted by us.

Q: How is the quality of your products?

A: Our products are manufacturer strictly according to production standard and each one is carefully inspected before delivery.

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