... S275, S355, ASTM 1010, ASTM 1017, ASTM 1020, ASTM A36StandardManufactured to meet ISO9001, ASTM, API, SAE, DIN, BSGB and ... SY requirementsApplicationWidely used in curtain walls, construction structure, machinery, container, furniture structure, electromechanical hardware, door and ... rectangle steel tubes, spiral steel tubes and stainless steel piping. Meanwhile, it also ...