ASTM A453 bụ nkọwapụta ihe maka studs, bolts, akụ na ndị ọzọ fasteners, bu n'obi maka iji ngwa okpomoku dị elu. ASTM A453 ka ekewapụtara klaasị 4 na klaasị 460 nke ụlọ ọrụ anọ ya bụ, b, c & d, nke ọ bụla kpụrụ nwere ihe dị iche iche dị iche iche na nsogbu. A na-eji ọkwa 660 660 na-eji ya na bolting, arịa nrụgide, pipeline flanges na valves, bu n'obi maka ọrụ okpomọkụ dị elu. ASTM A453 Akụrụngwa nke 660 bụ kemịkal ASTM B638 ogo nchara nchara alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy Alloy.