1. Grade: 10#-45#,16Mn,A53-A369,Q235,STB35,
2. Section Shape:Square
3. Standard: ASTM A500,JG 178-2005,JIS G3466,EN10210,GB/T6728-2002,GB/T6725-2002, GBT3094-2000
4. Certification: ISO9001, SGS, CE,BV