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ANSWER:HX220BD is a steel grade in European standard EN10346, HX220BD is bake hardening quality steel material (the steel exhibiting an increase in proof strength following heating in the region of 170 °C for 20 min ), , The material No. of HX220BD is 1.0919.
+AZ means Application of an Aluminium-zinc coating by immersing the prepared strip in a molten bath of Aluminium-zinc-silicon. The composition of the bath is 55% of aluminium,1.6% of silicon and the balance zinc. So HX220BD+AZ means hot dip Aluminium-Zinc coated, cold forming quality material with bake hardening quality.
HX220BD+AZ material steel have coil, strip, sheet condition, thickness is from 0.2mm-3mm.
HX220BD+AZ steel coating finish is N(Normal spangle) or M(Minimized spangle)
HX220BD+AZ steel Surface quality A (As coated surface) , B(Improved surface), C(Best quality surface)
HX220BD+AZ steel Surface treatment C (chemically passivated) , O (oiled), CO (chemically passivated and oiled) , P (phosphate) , PO (phosphate and oiled), S (sealed)
HX220BD+AZ steel Coating mass are: AZ100, AZ150, AZ185
HX220BD+AZ steel mechanical property:
Proof strength should be 220-280MPa
Tensile strength should be 320-400MPa
Elongation A80 should be not less than 32%
Plastic strain ratio r90 should be not less than 1.2
Strain hardening exponent n90 should be not less than 0.15
Bake-hardening Index BH2 should be not less than 35MPa
