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Q345 pipe material standard for fluid water

2016-06-17 11:29:48   Comment:0 Hits:
Q345 pipe material standard for fluid water
The material Q345 in fluid pipe in GB8163 there have three grade: Q345A,Q345B and Q345C. Q345 is also called 16Mn.
The component analysis is as the following:
Grade Chemical Component /%
C Si Mn Cr Mo V Ni Ti Nb Cu N P S
Q345A ≤0.20 ≤0.50 ≤0.17 ≤0.30 ≤0.10 ≤0.15 ≤0.50 ≤0.20 ≤0.07 ≤0.30 ≤0.012 ≤0.030 ≤0.030
Q345B ≤0.20 ≤0.50 ≤0.17 ≤0.30 ≤0.10 ≤0.15 ≤0.50 ≤0.20 ≤0.07 ≤0.30 ≤0.012 ≤0.030 ≤0.030
Q345C ≤0.20 ≤0.50 ≤0.17 ≤0.30 ≤0.10 ≤0.15 ≤0.50 ≤0.20 ≤0.07 ≤0.30 ≤0.012 ≤0.030 ≤0.030
 
The mechanical analysis is as the following:
Grade Normical THK mm Tension Test Impact Test Hardness Test
R    Mpa R   Mpa A      % Test temperature ℃ KV J HBW
Q345A ≤16 470~830 ≥345 ≥20      
Q345B ≤16 470~630 ≥345 ≥20 20 ≥34  
Q345C ≤16 470~630 ≥345 ≥21      
 
Q345 or 16Mn in alloy steel pipe fittings the chemical and mechanical is as the following:
Grade Chemical Component /%
C Si Mn Cr Ni Cu P S
16Mn 0.13~0.20 0.20~0.60 1.20~1.60 ≤0.30 ≤0.30 ≤0.25 ≤0.030 ≤0.020
 
The chemical standard
Grade Normical THK mm Tension Test Impact Test Hardness Test
R    Mpa R   Mpa A      % Test temperature ℃ KV J HBW
16Mn ≤100 480~630 ≥305 ≥20 0 ≥34 128~180
 

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