... :10#, 20#, 35#, 45#, 16Mn,Q345B 2 excutive standard:GB/T8162-1999 3 best quality Supply 10#, 20#, 35#, 45#, 16Mn ... ,Q345B structure pipe GB/T8162-1999 Commodity nameMain materialUsageExecutive standardSpecification scopeStructure pipe10#,20#,35#,45 ... 10-12-14-16-18-20-30-40 (reference picture of structure pipe used in structure fabrication)Contact person: Miss ...