Abstract
Experiments were carried out in accordance with a design of experiment and the following results were obtained.
(1) For rolled structural steel for welding of low (58-73kgf/mm2) and midium (41-52kgf/mm2) strength, yield point and elongation were not affected by the galvanizing conditions.
Tensile strength was affected by the cooling method, but the tensile strength of both galvanized steels were higher than that of the non-galvanized steel, and no adverse effects occured.
All tensile properties of the galvanized steels indicated higher or equivalent values in comparison with the non-galvanized steel.
(2) For high strength low alloy structural steel with a grade of 80kgf/mm2, yield point and tensile strength were not affected by the galvanizing conditions.
Elongation was affected by pretreatment conditions. The elongation of steel galvanized after blasting was less than that of steel galvanized after acid pickling, but no significant effect was attributable to whether a galvanized coating was applied or not.
