ANGLE BAR ASTM A276 ( 201 / 304 / 316L ) FLAT BAR ASTM A276 ( 201 & 304 ) ROUND BAR ASTM A276 ( 201 / 304 / 316L ) SQUARE BAR ASTM A276 ( 201 & 304 ) HEXAGONAL BAR ASTM A276 ( 201 & 304 )