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ANSWER:HCT450X is a steel grade in European standard EN10346, HCT450X+ZA is dual-phase quality steel material for cold forming (the steel consisting of mainly ferrite and martensite and possible bainite as a complementary phase ), The material No. of HCT450X is 1.0937.
+ZA means Hot-dip Zinc-aluminium alloy coated, application of a Zinc-aluminium coating by immersing the prepared strip in a molten bath of zinc-aluminum-aluminium. The composition of the bath is approximately 5% aluminum, small amounts of mischmetal and the balance zinc. So HCT450X+ZA means hot dip Zinc-aluminium coated, dual-phase quality steel material for cold forming.
HCT450X+ZA material steel have coil, strip, sheet condition, thickness is from 0.2mm-3mm.
HCT450X+ZA steel coating finish is N(Normal spangle) or M(Minimized spangle)
HCT450X+ZA steel Surface quality A (As coated surface) , B(Improved surface), C(Best quality surface)
HCT450X+ZA steel Surface treatment C (chemically passivated) , O (oiled), CO (chemically passivated and oiled) , P (phosphate) , PO (phosphate and oiled), S (sealed)
HCT450X+ZA steel Coating mass are: ZA095, ZA130, ZA185, ZA200, ZA255, ZA300
HCT450X+ZA steel mechanical property:
Yield strength should be 260-340MPa
Tensile strength should be not less than 450MPa
Elongation A80 should be not less than 27%
Strain hardening exponent should be not less than 0.16
Bake hardening index BH2 should be mot than than 30MPa
Elongation A80 should be not less than 13%
