Structure with seamless steel tube (GB/T8162-1999) is used for general structure and mechanical structure of seamless steel tube. GB/T8162 - China national standard ASTM A53 -- the United States materials and test criteria SA53 -- the ASME boiler and pressure vessel code
Main steel grades
10, 20, 35, 45, 15CrMo Q345, 12Cr1MoV, A53B, SA53A, just, and SA53B
With seamless steel tube structure
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