... Q345B Standard:GB/T 700-1988 thickness :2.5-24mm Stainless Steel Angle BarStandardJIS, AISI, ASTM, ... 5#~10# 25×25×(3,4,5)30×30×(3,4,5)40×40×(3,4,5,6)50×50×(3,4,5,6)60×60×(4,5,6 ... ,8)63×63×(4,5,6,8)65×65×(4,5,6,8)70×70×(5,6 ... ,8,10)75×75×(5,6 ... ,8,10)80×80×(5,6 ...