Hot Dip Galvanized Product Suppliers

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LY Steel hot dip galvanizing line with designed annual production capacity of 380,000 ton has the capacity to produce hot dip galvanized steel and hot dip galvalume steel. LY Steel has produced excellent corrosion-resis-tance hot dip galvanized (galvalume) steel with process of advanced electrolytic cleaning, automatic scraper cleaning, online coating weight monitoring system, anti-finger print/environmental passivation roller coating,which are widely used in household appliance, construction, door, process instrumentation and automotive in-dustries.

Coated sheet are classified into

Hot dip galvanized (GI) sheet and strip

Standard steel grades of Janpan, Europe and USA norm, eg. DX51D～DX56D,S220GD～S550GD,H180YD~H300YD,H260LAD~H420LAD,BH220+Z,H450DPD+Z,H600DPD+Z,SGCC,SGC400,

CSTYPEA+Z,CSTYPEB+Z,etc.

Hot dip galvanized (GI) sheet

Grade and Application of Hot Dip Galvanized

Hot dip galvanized sheet of LY Steel are produced from cold rolled substrate with various strength and thick-ness, hot dipped on two surfaces with a layer of metal zinc to prevent corrosion, which features in the perfor-mance of Zn electrochemical protection.

Steel grades	Application	Features	Executive norms
DX51D+Z	Common bending and formability	The product features in good ductility, apply for simple forming, bending and welding.	EN 10346-2009
CSTYPEB+Z			ASTM A653/A653M-09a
CSTYPEA+Z
SGCC			JIS G3302-2010
DX52D+Z	DQ	The product features in fine formability, apply to spare parts by drawing	EN 10346-2009
DX53D+Z	DDQ	The product features in excellent deep-drawing performance and good ductility, apply to spare parts by deep-drawing and complex forming
DX54D+Z	EDDQ	The product features in better ductility than DDQ, apply to spare parts by EDDQ and more complex forming.
DX56D+Z
S220GD+Z	Structural	The product features in high strength with normal processability, apply for simple forming, bending and welding.
S250GD+Z
S280GD+Z
S320GD+Z
S350GD+Z
S550GD+Z
H450DPD+Z	dual-phase steel	It has good resistance to corrosion fatigue wear and corrosion resistance, have higher strength and fatigue strength, good weldability, cracking tend to be small.	EN 10346-2009
H600DPD+Z
H260LAD+Z	high-strength steel	Steel strength can be obviously improved, good machinability and corrosion resistance.	EN 10346-2009
H300LAD+Z
H340LAD+Z
H380LAD+Z
H420LAD+Z
LGAF+Z	Chrome-free	Excellent fingerprint resistance and lubricity, can be undercoatofthickcoating	Technical standard on fingerprint resistance
LGDG1+Z	Rail steel	Excellentrollformingpropertyandsaltsprayproperty,canbe appliedonguiderailandsliderail	Technical standard on rail steel
LGDG2+Z
LGDG1+Z2
H180YD+Z	IF high strength	HighstrengthIFsteelwithgooddeepdrawabilityandstrength wasappliedinautomotivecomponentprocessing.	EN 10346-2009
H220YD+Z
H260YD+Z
H300YD+Z
SGC340	Structural application	The product features in high strength with normal processability, apply for simple forming, bending and welding.	JIS G3302-2010
SGC400

Surface quality

Grading	Code	Features
Common surface	FA	Detective surface is allowable, eg. Checkered bumps, dent, scratches, blisters, different micro-structure, dark spots, stripes and small passivation spots, etc. as well as tension levelling marks and zinc fluctuation marks. Cracks and slip lines is possible.
Fine surface	FB	FB could be reached after skin pass. Small-scale imperfection is allowable, eg. tension levelling marks, skin pass marks, slight scratches, surface structure, zinc fluctuation marks and passivation defect.
Excellent surface	FC	FB could be reached after skin pass. Non of any adverse effect of the higher-quality side on aspect after painting, the other surface shall meet the requirement of FB at least.

Recommended standard coating weight

Coating pattern	Pure zinc coating
Uniform thickness	Z60/Z80/Z100/Z120/Z150/Z180/Z220/Z250/Z275
Differential thickness	Each side:30，40，50，60，75，90，110，125，130，150
Remark: The coils with other coating weight could be supplied through negotiation between the supply and demand sides.

Coating thickness

Coating thickness	Pure zinc coating
Uniform thickness	30/30~135/135
Differential thickness	30~150(each side)
Remark: The maximum thickness difference ratio of differential thickness is 1:3.

Surface post-processing

Surface processing	Explanation
Chromatizing	To prevent exposed to moisture, corrosive risk less during transporation and storage. Local color spots on surface is possible after chromatizing, without affecting any product quality.
Chromate-free passivation	To prevent exposed to moisture, corrosive risk less during transporation and storage. The processing is characterized by the satisfaction of environment protection requirements.
Oiling	Surface early corrosive risk less, to prevent corrosion during transporation and storage.
Chromatizing + oiling	Double antiseptic of chromatizing and oiling
Chromate-freepassivation+ oiling(GI)	Double antiseptic of chromate-free passivation and oiling with satisfaction of environment protection requirements
Chromate-free anti-finger print (GL)	One razor-thin layer of organic coating on surface provides additional anti-corrosion protection as well as finger print resistance, which could improve lubricating property during forming and act as basement of subsequent coatings with satisfaction of environment protection requirements.
Remark: Mixed processing of GI and GL is applied for the surface without identifying GI or GL.

Performane of GI product

Product

Coating type

Processability

Apply to standard punching or deep drawing, which could be selected in accordance with processing requirement

Thermotolerance

Non-discoloring for long term use at 230℃ , but color change in exceed of 250℃

Corrosion resistance

The electrochemical protection of GI coating on steel is better than that of oil paint and plastic layer, higher collision-resistance and scratch-resistance without peeling off for decades.

Coating

Smooth coating film could be obtained through selection of zinc spangle