GB/T 8163 Q345E seamless alloy steel pipe

Standard: GB/T 8163

GB/T 8163 standard specifies the order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless steel pipes for fluid transportation. GB/T 8163 standard is applicable to seamless steel pipes for general fluid transportation.

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Q345E pipe is a Chinese GB standard high strength low alloy structural steel pipe made with a hot-rolling process. It is a general seamless steel pipe for conveying water, oil, gas and other fluids.

GB/T 8163: 10#, 20#, Q345A, Q345B, Q345C, Q345D, Q345E

GBT 8163 Q345E seamless steel pipe composition(%)

C max.	Si max.	Mn max.	P max.	S max.	Cr max.	Ni max.	Cu max.	N max.	Mo max.	Nb max.	V max.	Ti max.	Als min.
0.18	0.50	1.70	0.025	0.020	0.30	0.012	0.30	0.012	0.10	0.07	0.15	0.20	0.015

GBT 8163 Q345E seamless pipe mechanical properties

Grade	Tensile strength [Mpa]	Yield strength[MPa] in different wall thick			Elongation [%,min]
		≤16	16＜S≤30	S>30
Q345E	470-630	345	325	295	21

GBT 8163 Q345E seamless pipe size:Out diameter:8-716mm Wall thickness:1-50mm

Length: 3,000mm to 12,500mm

Surface: bare pipe, or to be painted with black or other color painting, or coated with anti-corrision paint

End types: plain end, or bevelled end

Outside Diameter Tolerance

Types	Tolerance, mm
Hot rolled pipe	±1%
Cold drawn pipe	±1%

Wall thickness Tolerance of cold drawn Q345E pipe

Wall Thickness (S) , mm	Tolerance
≤3	+15%, -10%
S>3	±12.5%, -10%

The company has advanced technology and equipment and a strong technical force,and its seamless pipes production and inspection equipment are most up-to-date in domestic steel pipe industry. Our GB/T 8163 Q345E seamless steel pipes are supplied in cold drawn and hot rolled steel pipe. These pipes are mainly used for mechanical properties and general engineering purposes.

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