CR CGL_Huangshi Shan Lixing metallurgical sheet Co., Ltd.

Two hot dip galvanizing lines, one is HR CGL with capacity of 400,000tpy, the other one is CR CGL with capacity of 300,000tpy: total capacity is 700,000tpy Strip specification of HR CGL is 23-4.0mm x 800-1350mm; while of CR CGL is 0. 2-2.3mm x 800-1350mm. The coating includes pure zinc coating and alloy coating and surface structure includes skin pass mill rolled spangle, little spangle, zero spangle surface treatment includes chrome passivation and/or oiling, chrome free passivation and/or oiling, chrome free anti-fingerprint

Hot dip galvanized products are widely used in auto, house appliance, building, mechanical manufacture, etc.

Standard, grade and purpose:

Type	Steel grade	Grade	Product standard	Grade in JIS G 3302 JFSA3011	Purpose
Low carbon steel and super low carbon steel	Commercial Quality (CQ)	DX51D+Z DX51D+ZF	GB/T 2518-2008 EN10327-2006 EN10326-2006	SGCC	Used for common forming component
	Draw Quality(DQ)	DX52D+Z DX52D+ZF		SGCD1 JAC270C	Used for draw forming component
	Deep Draw qualty(DDQ)	DX53D+Z DX53D+ZF		SGCD2 JAC270D	Used for deep draw forming component
	Extra-Deep Draw Qualty (EDOQ)	DX54D+Z DX54D+ZA		SGCD3 JAC270E	Used for extra deep draw forming component
Carbon structural steel or low alloy steel	structural steel （CQHSS)	S220GD+Z S250GD+Z S280GD+Z S320GD+Z S350GD+Z S550GD+Z		SGC340 SGC400 SGC440 SGC590	Used for structural

Product properties:

Grade	Tensile test			r90 min	n90 min	Coating adhesiveness
	RcL Mpa	Rm Mpa	A80mm % min			Bending diameter(a=strip thickness) of different coating weight(g/㎡)
						≦140/140	＞140/140～ ≦175/175	﹥175/175
DX51D+Z		270～500	22			d=a	d=a	d=2a
DX52D+Z	140～300	270～420	26
DX53D+Z	140～260	270～380	30
DX54D+Z	120～220	270～350	36	1.6	0.18

Product properties:

Grade	Tensile test			Coating adhesiveness
Grade	RcL Mpa	Rm Mpa	A80mm % min	180°Bending diameter(a=strip thickness)
S220GD+Z	220	300	20	d=a
S250GD+Z	250	330	19	d=a
S280GD+Z	280	360	18	d=2a
S320GD+Z	320	390	17	d=3a
S350GD+Z	350	420	16	d=3a
S550GD+Z	550	560

Product dimension,coil diameter,coil weight:

Type	Nominal thickness mm	Nominal width mm	Coil O.D. mm	Coil I.D. mm	Weight T
Common galvanizing(Z)	0.25-4.0	800-1250	610 OR 508	900-2100	coil≤25
Zn-Al(ZA)	0.25-1.5	800-1250	610 OR 508	900-2100	coil≤25

Nominal width(mm):

Yield strength min. Mpa	Nominal thickness mm	Thickness tolerance(mm)
		Normal precision PT.A			PT.B High precisionPT.B
		Nominal width（mm）
		≤1200	＞1200-≤1500	＞1500	≤1200	＞1200-≤1500
﹤280	≤0.4	±0.05	±0.06	-	±0.03	±0.04
	＞0.40-0.60	±0.06	±0.07	±0.08	±0.04	±0.05
	＞0.60-0.80	±0.07	±0.08	±0.09	±0.05	±0.06
	＞0.80-1.00	±0.08	±0.09	±0.10	±0.06	±0.07
	＞1.00-1.20	±0.09	±0.10	±0.11	±0.07	±0.08
	＞1.20-1.60	±0.10	±0.12	±0.12	±0.08	±0.09
	＞1.60-2.00	±0.13	±0.14	±0.14	±0.09	±0.10
	＞2.00-2.50	±0.15	±0.16	±0.16	±0.11	±0.12
	＞2.50-3.00	±0.17	±0.18	±0.18	±0.12	±0.13
	＞3.00-4.00	±0.20	±0.20	±0.20	±0.15	±0.15
≥280	≤0.4	±0.06	±0.07	-	±0.04	±0.05
	＞0.40-0.60	±0.07	±0.08	±0.09	±0.05	±0.06
	＞0.60-0.80	±0.08	±0.09	±0.11	±0.06	±0.06
	＞0.80-1.00	±0.09	±0.11	±0.12	±0.07	±0.07
	＞1.00-1.20	±0.11	±0.12	±0.13	±0.08	±0.09
	＞1.20-1.60	±0.13	±0.14	±0.14	±0.09	±0.11
	＞1.60-2.00	±0.15	±0.17	±0.17	±0.11	±0.12
	＞2.00-2.50	±0.18	±0.19	±0.19	±0.13	±0.14
	＞2.50-3.00	±0.20	±0.21	±0.21	±0.14	±0.15
	＞3.00-4.00	±0.22	±0.24	±0.25	±0.20	±0.21

Note:For cold-rolled wide strip in the weld zone within 15m of thickness tolerances than the specified value on the table is 60% larger.

Width tolerance:

Nominal width mm	Width tolerance(mm)
	Normal precision PW.A		High precision PW.B
	Min	Max	Min	Max
≥600-1200	0	+5	0	+2
＞1200-1500	0	+6	0	+2

Length tolerance:

Nominal length mm	Length tolerance(mm)
	Normal precision PL.A		High precision PL.B
	Min	Max	Min	Max
﹤2000	0	+6	0	+3
≥2000	0	lenght of 0.3%	0	lenght of 0.15%

Flatness

flatness of galvanized strip with minimum yield strength <280Mpa:

Nominal width mm	Flatness,not greater than（mm）
	Normal precision PF.A			High precision PF.B
	Nominal thickness
	﹤0.7	≥0.7～1.2	≥1.2	﹤0.7	≥0.7～1.2	≥1.2
≥600～1200	12	10	8	5	4	3
≥1200～1500	15	12	10	6	5	4
≥1500	19	17	15	8	7	6

Flatness of galvanized strip with minimum yield strength =280~360Mpa:

Nominal width mm	Flatness,not greater than（mm）
	Normal precision PF.A			High precision PF.B
	Nominal thickness
	﹤0.7	≥0.7～1.2	≥1.2	﹤0.7	≥0.7～1.2	≥1.2
≥600～1200	15	13	10	8	6	5
≥1200～1500	18	15	13	9	8	6
≥1500	22	20	19	12	10	9

Coating weight:

Surface structure	Coating grade	Double sides coaing weight.min.g/㎡		Coating weight theoretical reference value,single point per side		Density g/㎝2
Surface structure	Coating grade	Three-points test	Single-point test	Typical value （2）	Range	7.1
Pure zinc coating (z)	Z100	100	85	7	5～12
	Z140	140	120	10	7～15
	Z200	200	170	14	10～20
	Z225	225	195	16	11～22
	Z275	275	235	20	15～27
	Z450	450	385	32	24～42
	Z600	600	510	42	32～55

Note:

1)grade of Zn-Fe alloy coating ti ZF120

2)double side coating weight 100g/m2 corresponds to coating thickness 7.1um

3）coating weight can be tailored to customer's special requirement.

Coatinglayer surface structure:

Surface structure	Code	Instuctons	Pupose
Normal spangle	N	In common condition,zinc layer cools down and condensates into spangles after galvanizing.	Common purpose
Zero spangle	M	Adopts a special process to interfere solidification of coating metal to get required surface structure.In this way only tiny spangles sometimes invisible formed.	Used in case that normal spangle cannot meet appearance requirements.
Skin pass mill rolled	SP	Coating structure after rolled by skin pass mill,it has no metallic luster which is benefit for improving appearance or decoration painting.	Used in case to satisfy high requirement of surface quality, also can be used for base metal of color coating.

Surface treatment and feature:

Surface treatment type	Code	Instuctons
Chemical passivation	C	Chemical passivation is to protect product surface not contact with moisture air,so as to reduce risk of rust during storage and transportation.
Chemical passivation	EC
Oiling	O	Oiling can reduce risk of corrosion so as to improve anti-corrosion ability of product.
Chemical passivation +oiling	CO	Oiling after passivation can further improve anti-corrosion ability of product.
Chemical passivation +oiling	ECO
Anti-fingerprint(roll coater)	S	Through coating one thin layer of organic film with each side 1~2g/m2,it can improve property of anti-corrosion,anti-fingerprint,solvent resistance and high conductivity,etc.In addition,when forming,it can improve lubrication property.It can also be base of further coating.
Anti-fingerprint(roll coater)	ES
Phosphorization(roll coater)	P	It can be preparation of further painting and has function of lubrication;it can also reduce risk of rust during storage and transportation.
Phosphorization+oiling	PO	Further reduce risk of rust and can improve lubrication property.
Without surface treatment	u	Without any anti-rust treatment.Only in case that customer will undertake risk of rust by themselves.

Note:EC,ECO,ES belongs to environment protection products.

Surface quality refers to company standard and rules as below:

Surface grade	Feature
FA	Following defects are acceptable such as tiny zinc grain,scratch,imprint,uneven color,black point,air wiper wale,passivation light spot,wale occurred due to tension leveling,zinc flow,etc.
FB	Defects in small range is acceptable such as imprint by skin pass mill,slight scratch,tiny spangle,zinc flow wale,passivation mark, etc.
FC	The side under control should not influence the uniform appearance of painting;the other side should reach level B at least.

Note:A: without treatment of SPM,B,C:with treatment of SPM

Tensile strain mark:

It can guarantee no tensile strain mark occurred within 6 months to product made of steel DX53D,DX54D.Due to tensile strain mark easy to occur for steel DX51D,DX52D and

so on,it is suggested to use it as soon as possible (within 1 month).If customer has strict requirement for this,it should be specified in agreement.