{} Macro Ye spring for hot rolled steel thick-walled steel pipe / Yunnan / Kunming thick hot rolled steel manufacturer which is good - thick plate steel coils steel roll the name suggests is made of rolled steel sheet, mainly used for billboards, Engineering column, large shaft processing industries. Steel coil thickness is generally in 6-20mm, the use of cold-roll processing methods to most 20-35mm thick between. 
 Generally refers to the thick-walled steel pipe coil above the plate thickness of 45mm roll steel, due to the increase in wall thickness of steel strength and hardness with the increase in volume if it is cold on the way likely to cause material injury, cracks and other signs, the thick-walled we must use hot rolled steel method, the overall heating plate after rolling and welding, in the rolling machine to rotate within the shape, then welded by branch lengths to meet customer demand, weld after testing, the weld reinforcement worn After the test factory. Lee Hyo-wide 13406358016 
 Thick-walled large-diameter steel pipe coils are more due to the intensity when rolling large volumes are generally 1.8-2.5m and then welded to the customer the required length. Also known as T-welding, thick-walled steel coil material can be used Q235B, Q345B, Q345C, Q345A, 16Mn and so on. 45 # or high alloy is more rare, because of their higher strength.