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ANSWER:HX260YD is a steel grade in European standard EN10346, HX260YD+ZM is cold forming quality material with high proof strength , The material No. of HX260YD is 1.0926. HX260YD is the steel whose composition is controlled to achieve improve plastic strain ratio r and strain hardening exponent n values
+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 HX260YD+ZA means hot dip Zinc-aluminium coated, cold forming quality material with high proof strength.
HX260YD+ZA material steel have coil, strip, sheet condition, thickness is from 0.2mm-3mm.
HX260YD+ZA steel coating finish is N(Normal spangle) or M(Minimized spangle)
HX260YD+ZA steel Surface quality A (As coated surface) , B(Improved surface), C(Best quality surface)
HX260YD+ZA steel Surface treatment C (chemically passivated) , O (oiled), CO (chemically passivated and oiled) , P (phosphate) , PO (phosphate and oiled), S (sealed)
HX260YD+ZA steel Coating mass are: ZA095, ZA130, ZA185, ZA200, ZA255, ZA300
HX260YD+ZA steel mechanical property:
Proof strength should be 260-320MPa
Tensile strength should be 380-440MPa
Elongation A80 should be not less than 30%
Plastic strain ratio r90 should be not less than 1.4
Strain hardening exponent n90 should be not less than 0.16
