• GBT 8162 q345b q420d low alloy high strength structural steel pipes

GB/T 8162 specifies the dimensions, technical requirements, test methods and inspection rules of seamless steel tubes for low-alloy high-strength structural steel tubes, high-quality carbon structural steel tubes and alloy structural steel tubes.Would you like to know more about these steel pipes including manufacturing methods, delivery status, prices and freight charges?Just contact us and begin our cooperation.

Specifications

Standard GB/T 8162
Steel Grade/Material Q345A,Q345B,Q345C,Q345D,Q345E,Q390A,Q390B,Q390C,Q390D,Q390E,Q420A,Q420B,Q420C,etc.
OEM service Provide
Outer Diameter(OD) 1 1/2”-28”(38mm-720mm)
Wall Thickness(WT) 2.6mm-60mm
Length 5.8-16m or OEM
Packing PE,Plastic cap or bundling
Surface Treatmengt Bare
Section Shape Round
Technique Seamless hot rolled
Application Used as structure tubes
Sour service No
Place of Origin China
MOQ 25 ton
Transportation 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port
→America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea,
Australia…(shipping)

2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”)
Khorgos port(Пограничный пункт “Хоргос”)
→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)
Erlianhot port→Mongolia(Train and Truck)
Manchuria port→Russia(Train and Truck)

Steel grade and chemical composition of low alloy high strength structural steel pipe
Steel grade Chemical Composition/%
C Si Mn P S Nb V Ti Cr Ni Cu N Mo B Als
Q345A 0.2 0.5 1.7 0.035 0.035 0.3 0.5 0.2 0.012 0.1
Q345B
Q345C 0.03 0.03 0.07 0.15 0.2 0.015
Q345D 0.18 0.03 0.025
Q345E 0.025 0.02
Q390A 0.2 0.5 1.7 0.035 0.035 0.07 0.2 0.2 0.3 0.5 0.2 0.015 0.1
Q390B
Q390C 0.03 0.03 0.015
Q390D 0.03 0.025
Q390E 0.025 0.02
Q420A 0.2 0.5 1.7 0.035 0.035 0.07 0.2 0.2 0.3 0.8 0.2 0.015 0.2
Q420B
Q420C 0.03 0.03 0.015
Q420D 0.03 0.025
Q420E 0.025 0.02
Q460C 0.2 0.6 1.8 0.03 0.03 0.11 0.2 0.2 0.3 0.8 0.2 0.015 0.2 0.005 0.015
Q460D 0.03 0.025
Q460E 0.025 0.02
Q500C 0.18 0.6 1.8 0.025 0.02 0.11 0.2 0.2 0.6 0.8 0.2 0.015 0.2 0.005 0.015
Q500D 0.025 0.015
Q500E 0.02 0.01
Q550C 0.18 0.6 2.0 0.025 0.02 0.11 0.2 0.2 0.8 0.8 0.2 0.015 0.3 0.005 0.015
Q550D 0.025 0.015
Q550E 0.02 0.01
Q620C 0.18 0.6 2.0 0.025 0.02 0.11 0.2 0.2 1.0 0.8 0.2 0.015 0.3 0.005 0.015
Q620D 0.025 0.015
Q620E 0.02 0.01
Mechanical properties of low alloy high strength structural steel pipes
Steel grade Tensile strength Rm/MPa Lower yield strength ReL/MPa Elongation after break Impact test
WT≤16mm 16mm-30mm >30mm Temperature/ Absorb energy KV2/J
Q345A 470-630 345 325 295 20
Q345B +20 34
Q345C 21 0
Q345D -20
Q345E -40 27
Q390A 490-650 390 370 350 18
Q390B +20 34
Q390C 19 0
Q390D -20
Q390E -40 27
Q420A 520-680 420 400 380 18
Q420B +20 34
Q420C 19 0
Q420D -20
Q420E -40 27
Q460C 550-720 460 440 420 17 0 34
Q460D -20
Q460E -40 27
Q500C 610-770 500 480 440 17 0 55
Q500D -20 47
Q500E -40 31
Q550C 670-830 550 530 190 16 0 55
Q550D -20 47
Q550E -40 31
Q620C 710-880 620 590 550 15 0 55
Q620D -20 47
Q620E -40 31
Q690C 770-940 690 660 620 14 0 55
Q690D -20 47
Q690E -40 31

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