DC56D+Z Hot-dip galvanized steel

2014/4/29 23:43:23

DC56D+Za is a kind of hot dipped galvanized steel under the standard Q/BQB 420-2003. It is widely used for the production of automobile, construction, household appliances and other industries both inside and outside covering parts and components.
DC56D+Za Chemical composition:

Grade	Chemical composition %
Grade	C max	Si max	Mn max	P max	S max	Alt min	Ti max	Nb max
DC56D+Za	0.01	0.10	0.30	0.025	0.020	0.015	0.1	0.1

DC56D+Za Mechanical Property:

STEEL GRADE	Tensile Strength (Mpa)	Yield Strength (Mpa)	n90	r90	Elongation% min (Lo=80mm b=20mm)		The coating adhesion (The heart bending diameter )
STEEL GRADE	Tensile Strength (Mpa)	Yield Strength (Mpa)	min	min	<0.7mm	>0.7mm	<140/140	>140/140-175/175	>175/175
DC56D+Za	270-350	120-180	0.21	1.9	38	40	0a	1a	2a

a means when the thickness is more than 1.5mm, the minimum value r90 can lower 0.2.
b means when the thickness not more than 0.7mm, the minimum value r90 can lower 0.2, n90 can lower 0.01.
c means For difference thickness of coating products, thick coating surface as the outer surface of the bending test.

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