GB 8162 SMLS structural steel tube Q345E seamless pipe

GB 8162 SMLS structural steel tube Q345E seamless pipe

Standard: GB/T 8162

The structural use Q345E seamless pipe is produced according to GB 8162 technical standard, which has detailed limitation for the size, shape, weight, technical requirements, test methods and so on requirements for qualified Q345E structural steel pipe.

E-mail: [email protected]

Chat OnlineLeave a message

The structural use Q345E seamless pipe is produced according to GB 8162 technical standard, which has detailed limitation for the size, shape, weight, technical requirements, test methods and so on requirements for qualified Q345E structural steel pipe. The impact test temperature of Q345E seamless pipe is -40℃, and the min. impact energy is 27J. So Q345E seamless pipe can perform well in low temperature working environment.

GB 8162 SMLS structural steel tube Q345E seamless pipe chemical composition:

GB 8162 C Mn Si P S V Nb Ti Cr Ni Cu N Mo B Al
Q345D ≤0.18 1.70 ≤0.50 ≤0.025 ≤0.020 ≤0.15 ≤0.07 ≤0.20  ≤0.30  ≤0.50 ≤0.20 ≤0.012 ≤0.10 - ≥0.015

GB 8162 SMLS structural steel tube Q345E seamless pipe mechanical properties:

GB 8162 Yield Strength Min Tensile Strength Elongation
Q345D WT≤16 WT>16-30 WT>30    
345 Mpa 325 Mpa 295 Mpa 470-630 Mpa 20%

The diameter tolerance of hot-finished GB 8162 SMLS structural steel tube Q345E seamless pipe:
±1%OD or ±0.50mm, depending on the larger.

Wall thickness tolerance of hot-finished GB 8162 SMLS structural steel tube Q345E seamless pipe: 

If both the supplier and buyer agree, the wall thickness tolerance of GB 8162 SMLS structural steel tube Q345E seamless pipe can also be made by negotiation.

Hot rolled Outside Diameter, mm Tolerance
OD≤102 ±12.5%WT or ±0.40mm, choose the larger
OD>102, WT/OD≤0.05 ±15%WT or ±0.40mm, choose the larger
OD>102, 0.05<WT/OD≤0.10 ±12.5%WT or ±0.40mm, choose the larger
OD>102, WT/OD>0.10 +12.5%WT, -10%WT
Hot expanded ±15%WT

It is worth mentioning that the phosphorus content of GB 8162 Q345E seamless pipe is ≤0.025 and sulfur content ≤0.025. It is known that the more phosphorus and sulfur impurities in steel, the worse the impact toughness. With the low content of phosphorus and sulfur, GB 8162 Q345E seamless pipe gets good impact toughness at low temperature.

Meanwhile, GB 8162 Q345E seamless pipe contains micro alloy elements, which help Q345E steel pipe obtain certain corrosion resistance. GB 8162 SMLS structural steel tube Q345E seamless pipe plays an important role in the structural applications.

Please feel free to give your inquiry in the form below.we will reply you quickly. Online Chat