Color coated Galvanized Cold rolled Steel coil

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Tianjin
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25 m.t.
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300 m.t./month

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GradeChemical composition %
CSiMnPSAltaTiNb
No more thanNo more thanNo more thanNo more thanNo more thanNo less thanNo more thanNo more than
DC51D+Z,DC51D+ZF0.1---0.50.0350.035---------
(St01Z,St02Z,St03Z)
GradeMechanical propertiesplating  adhesion
yield strengthtensile strengthn 90r 90Elongation %Plating weight(g/m 2 )
MpaMpaNo less thanNo less thanNo less thanBending diameter
 (a=thickness of slab)
L 0 =80mm b=20mm
Normal   thickness  mm
≤ 0.7>0.7≤ 140/140>140/140~>175/175
175/175
DC51D+Z(St01Z,St02Z,St03 Z), DC51D+ZF---270~500------20220a1a2a
 Exposure Test :Salt Spray Test :
EnvironmentGIEnviroment GI Average CorrosionAL-ZN  Average Corrosion
Average corrosion
g/m2 /yμ  m/yg/m2/yum/yg/m2/yum/y
Tough Marine Climate1409.8tough Marine Climate1409.8162.2
Moderate Marine Climate181.3Modeerate Marine Climate 181.340.54
Industrial Climate201.4Industrial Climate201.44.20.57
Countryside Climate40.28Countryside Climate40.281.30.17
Plainness of hot dip galvanized substrate
A.2.1 For steel sheet with a specified minimum yield strength less than 260MPa, the maximum plainness tolerance should be in conformity with the stipulations of Table A1.
MPaNominal widthPlainness (mm) for the nominal thickness as shown below
Common precise PF.AHigh-level precision PF.B
<0.700.70~<1.601.60~3.0<0.700.70~<1.601.60~3.0
<260<12001088543
1200~<1500121010654
≥1500171515876
For steel sheet and steel strip with a specified minimum yield strength not less than 260MPa but less than 360MPa,and the grades of DC51+Z/Z  DD51D+Z /S550GD+Z/ZF), the maximum plainness tolerance should be in conformity with the stipulations of Table A2.
Table A2
MPaNominal widthPlainness (mm) for the nominal thickness as shown below
Common precise PF.AHigh-level precision PF.B
<0.700.70~<1.601.60~3.0<0.700.70~<1.601.60~3.0
260~<360<1200131010865
1200~<1500151313986
≥150020191912109
Thickness tolerance for hot dip galvanized substrate
For steel sheet with a specified minimum yield strength less than 260MPa, the maximum thickness tolerance should be in conformity with the stipulations of Table A6.
Nominal thicknessThickness tolerance while the widths are showed as follows
Common precise PT.AHigh-level precision PT.B
≤1200>1200~1500>1500≤1200>1200~1500>1500
0.30~0.40±0.04±0.05±0.06±0.030±0.035±0.040
>0.40~0.60±0.04±0.05±0.06±0.035±0.040±0.045
>0.60~0.80±0.05±0.06±0.07±0.040±0.045±0.050
>0.80~1.00±0.06±0.07±0.08±0.045±0.050±0.060
>1.00~1.20±0.07±0.08±0.09±0.050±0.060±0.070
>1.20~1.60±0.10±0.11±0.12±0.060±0.070±0.080
>1.60~2.00±0.12±0.13±0.14±0.070±0.080±0.090
>2.00~2.50±0.14±0.15±0.16±0.090±0.100±0.110
>2.50~3.00±0.17±0.17±0.18±0.110±0.120±0.130
For steel sheet and steel strip with a specified minimum yield strength not less than 260MPa but less than 360MPa, the thickness tolerance should be in conformity with the stipulations of Table A7. 
Nominal thicknessThickness tolerance while the widths are showed as follows
Common precise PT.AHigh-level precision PT.B
≤1200>1200~1500>1500≤1200>1200~1500>1500
0.30~0.40±0.05±0.06±0.07±0.035±0.040±0.045
>0.40~0.60±0.05±0.06±0.07±0.040±0.045±0.050
>0.60~0.80±0.06±0.07±0.08±0.045±0.050±0.060
>0.80~1.00±0.07±0.08±0.09±0.050±0.060±0.070
>1.00~1.20±0.08±0.09±0.11±0.060±0.070±0.080
>1.20~1.60±0.11±0.13±0.14±0.070±0.080±0.090
>1.60~2.00±0.14±0.15±0.16±0.080±0.090±0.110
>2.00~2.50±0.16±0.17±0.18±0.110±0.120±0.130
>2.50~3.00±0.19±0.20±0.20±0.130±0.140±0.150
For steel sheet and steel strip with a specified minimum yield strength not less than 360MPa, but less than or equal to 420 MPa, the thickness tolerance should be in conformity with the stipulations of Table A8.
Nominal thicknessThickness tolerance while the widths are showed as follows
Common precise PT.AHigh-level precision PT.B
≤1200>1200~1500>1500≤1200>1200~1500>1500
0.30~0.40±0.05±0.06±0.07±0.040±0.045±0.050
>0.40~0.60±0.06±0.07±0.08±0.045±0.050±0.060
>0.60~0.80±0.07±0.08±0.09±0.050±0.060±0.070
>0.80~1.00±0.08±0.09±0.11±0.060±0.070±0.080
>1.00~1.20±0.10±0.11±0.12±0.070±0.080±0.090
>1.20~1.60±0.13±0.14±0.16±0.080±0.090±0.110
>1.60~2.00±0.16±0.17±0.19±0.090±0.110±0.120
>2.00~2.50±0.18±0.20±0.21±0.120±0.130±0.140
>2.50~3.00±0.22±0.22±0.23±0.140±0.150±0.160
For steel sheet and steel strip with a specified minimum yield strength not less than 420MPa, but less than or equal to 900 MPa, the thickness tolerance should be in conformity with the stipulations of Table A9.
Nominal thicknessThickness tolerance while the widths are showed as follows
Common precise PT.AHigh-level precision PT.B
≤1200>1200~1500>1500≤1200>1200~1500>1500
0.30~0.40±0.06±0.07±0.08±0.045±0.050±0.060
>0.40~0.60±0.06±0.08±0.09±0.050±0.060±0.070
>0.60~0.80±0.07±0.09±0.11±0.060±0.070±0.080
>0.80~1.00±0.09±0.11±0.12±0.070±0.080±0.090
>1.00~1.20±0.11±0.13±0.14±0.080±0.090±0.110
>1.20~1.60±0.15±0.16±0.18±0.090±0.110±0.120
>1.60~2.00±0.18±0.19±0.21±0.110±0.120±0.140
>2.00~2.50±0.21±0.22±0.24±0.140±0.150±0.170
>2.50~3.00±0.24±0.25±0.26±0.170±0.180±0.190
Width tolerance
Nominal widthWidth toleranceWidth tolerance of the hot-dip zinc, hot-dip alu-zinc coated alloy steel sheets should conform to relevant parameters designed by A12.
Common precise PW.AHigh-level precision PW.B
≤12000~+50~+2
>1200~15000~+60~+2
>15000~+70~+3
 

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