... price!!!!! Nantong Sanzhong Pipeline Co., Ltdgreen house, garden tools,canopy, steel pipewe produce steel pipe,green house 1)WT: 0.9mm--20mm2)O ... .50%, P - 0.045%, S - 0.050%, AL - Min. 0.02%.:b)Mechanical = UTS - 315 to 430 N/mm2, YS - 195N ... quality, good service!Tel: 0086-513-88857885, 0086-513-88867885 green house(ISO9001:2000) with satisfying price!