• Color coated Galvanized Cold rolled Steel coil System 1
  • Color coated Galvanized Cold rolled Steel coil System 2
  • Color coated Galvanized Cold rolled Steel coil System 3
  • Color coated Galvanized Cold rolled Steel coil System 4
  • Color coated Galvanized Cold rolled Steel coil System 5
Color coated Galvanized Cold rolled Steel coil

Color coated Galvanized Cold rolled Steel coil

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Tianjin
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TT OR LC
Min Order Qty:
25 m.t.
Supply Capability:
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
 

Q:What are the different types of steel coil finishing tools?
In the metalworking industry, various tools are utilized to finish steel coils, resulting in enhanced appearance and functionality. Common examples of these tools include: 1. Slitting Machines: These machines effectively cut large steel coils into narrower strips by utilizing sharp circular blades. The outcome is multiple smaller coils with desired widths. 2. Levellers: Used to flatten and straighten steel coils, levellers apply pressure to ensure a perfectly flat and even coil. They are particularly beneficial when coils have undergone deformation during the manufacturing process. 3. Recoilers: After slitting or levelling, recoilers rewind steel coils into a tighter and more compact shape. This process is carried out to create coils of specific diameters or sizes. 4. Edge Trimmers: To eliminate excess or uneven edges from steel coils, edge trimmers are utilized. They efficiently remove burrs, rough edges, and any other imperfections, resulting in a clean and smooth finish. 5. Inspection Machines: These machines are employed to examine the quality of steel coils. They detect defects such as surface imperfections, scratches, or dents, ensuring that only high-quality coils are delivered to customers. 6. Coating Machines: To provide protective coatings to steel coils, coating machines are utilized. These coatings, such as paint, zinc, or other materials, prevent corrosion and enhance coil durability. 7. Packaging Machines: Packaging machines securely wrap steel coils, protecting them during transportation and storage. These machines employ plastic or metal straps, shrink wrap, or other packaging materials to ensure the coils remain intact and undamaged. Overall, these diverse steel coil finishing tools are essential in the metalworking industry, enabling manufacturers to produce high-quality and visually appealing steel coils that meet specific customer requirements.
Q:What are the different coil slitting methods used for steel coils?
Steel coils can be slit into smaller, narrower coils using various methods. These methods serve the purpose of cutting the coils to suit specific applications. 1. The most commonly used method for coil slitting is blade slitting. Circular knives or blades are employed to cut the steel coil into narrower strips. These blades are placed at predetermined intervals and usually attached to a rotating shaft. As the coil passes through the blades, their circular motion slices through the coil, resulting in the desired narrower strips. 2. Another method, known as rotary shear slitting, involves the use of two sets of rotary shear knives to cut the steel coil. These upper and lower sets of knives rotate in opposite directions, creating a scissor-like cutting action. As the coil is fed through the shearing blades, the sharp edges of the knives slice through the coil, producing the desired narrower strips. 3. Sliding shear slitting is yet another method utilized for coil slitting. This method involves a stationary upper knife and a moving lower knife to cut the coil. The lower knife moves back and forth across the coil while the upper knife remains fixed. As the coil passes through the moving knife, it is cut into narrower strips. 4. Crush slitting is a less common method employed for coil slitting. In this method, the steel coil is fed through a set of rollers equipped with blades. Although the blades are not sharp, the pressure exerted by the rollers crushes and fractures the coil, resulting in the creation of the desired narrower strips. 5. Laser slitting is a modern and precise method used for coil slitting. It utilizes a laser beam to cut through the steel coil. The laser beam is directed onto the coil, and its high intensity melts and vaporizes the steel, creating a narrow slit. Laser slitting offers high accuracy and a clean cut, making it suitable for specialized applications. Each of these coil slitting methods possesses its own advantages and limitations. The choice of method depends on factors such as the type of steel, desired strip width, production volume, and required precision. Manufacturers select the most suitable method based on their specific requirements and the properties of the steel coils they are processing.
Q:How are steel coils inspected for surface finish after processing?
Steel coils are inspected for surface finish after processing through visual inspection techniques such as using specialized lighting and magnification tools to detect any imperfections, scratches, or blemishes on the coil's surface.
Q:Can steel coils be coated with phosphorescent materials?
Yes, steel coils can be coated with phosphorescent materials.
Q:What are the characteristics of hot-rolled steel coils and cold rolled steel coils? What loading and unloading tools should be used? What items should be paid attention to?
General handling steel rolls are used for driving. Forklift trucks are OK, but a larger fork truck, usually cold rolled, weighs less than 15T. The hot rolled coil is below 30T.
Q:What are the different methods of storing steel coils?
There are several methods of storing steel coils, depending on the specific requirements and constraints of the storage facility. Some of the commonly used methods include: 1. Stack storage: This method involves stacking the steel coils on top of each other in a stable manner. It is a cost-effective method, as it maximizes the use of vertical space. However, it requires careful stacking to ensure stability and prevent damage to the coils. 2. Block stacking: In this method, steel coils are arranged in blocks, with each coil placed directly on top of another. The blocks are then stacked to maximize the use of space. This method provides stability and allows for easy access to individual coils. However, it may require the use of additional equipment such as coil cradles or coil saddles to prevent damage. 3. Coil cradles: Coil cradles are specialized racks or frames that are designed to hold steel coils horizontally. They provide support and prevent the coils from rolling or shifting. This method is particularly suitable for smaller coils or when quick access to individual coils is required. 4. Coil saddles: Coil saddles are U-shaped frames that are specifically designed to hold and support steel coils vertically. They are often used in conjunction with block stacking or stack storage methods. Coil saddles provide stability and prevent the coils from rolling or collapsing. 5. Coil racks: Coil racks are steel structures that are designed to hold multiple coils in an organized manner. They may have several levels or tiers, allowing for efficient use of space. Coil racks are typically used for larger coils and can be customized to accommodate specific coil dimensions. 6. Automated storage systems: In large-scale storage facilities, automated systems such as coil cranes or coil carousels may be employed. These systems use mechanical devices to transport and store steel coils, allowing for efficient and fast retrieval when needed. They are particularly useful in high-volume operations where frequent coil handling is required. It is essential to consider factors such as coil size, weight, accessibility, and environmental conditions when determining the most suitable method of storing steel coils. Additionally, proper handling, labeling, and regular inspections are crucial to ensure the integrity and longevity of the stored coils.
Q:How are steel coils used in the manufacturing of food processing equipment?
Steel coils are used in the manufacturing of food processing equipment as they provide a strong and durable material for constructing various components such as conveyor belts, mixing blades, and cutting tools. The coils are typically shaped, cut, and molded to create specific parts that can withstand high temperatures, heavy loads, and corrosive conditions commonly encountered in food processing.
Q:How are steel coils used in the manufacturing of transportation equipment?
Steel coils are used in the manufacturing of transportation equipment as they provide a strong and durable material for various components such as frames, bodies, and chassis. These coils are often processed and shaped into different forms, allowing for customization and versatility in the design and construction of vehicles, including cars, trucks, trains, and ships.
Q:Can steel coils be customized according to specific requirements?
Yes, steel coils can be customized according to specific requirements. Manufacturers can tailor the dimensions, thickness, width, and coating of steel coils to meet the specific needs of their customers. This customization allows for greater flexibility and ensures that the steel coils are suitable for various applications and industries.

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