Introducing our top-of-the-line Galvanized Steel Coils, designed to meet the highest standards of quality and performance. Engineered with precision and coated with a layer of zinc, our galvanized steel coils offer superior corrosion resistance, making them ideal for a wide range of applications.
Hot-dipped galvanized steel coil is a type of steel product that has been coated with a layer of zinc to protect it from corrosion. The process involves immersing the steel coil into a bath of molten zinc, which forms a metallurgical bond between the zinc and the steel.
This coating provides a durable and long-lasting barrier against rust and other forms of corrosion, making it ideal for use in various applications such as construction, and manufacturing industries.
Zinc Coating | 20-275g/m2 |
Thickness | 0.13-0.8 mm |
Width | 600-1250 mm |
Coil ID | 508/610mm |
Coil weight | 3-8 tons |
Surface Finish | Mini/Big Spangle |
Surface Treatment | Anti-Finger printing ,Chromated, oiled/ non-oiled |
Thickness(mm) | Regular spangle: 0.3-5.0 Zero spangle: 0.6-1.8 |
Width(mm) | 32-860 |
Coating Weight(g/square meter) | 50-275 |
Inner diameter(mm) | 508/610 |
Surface structure | Regular spangle, Zero spangle |
Surface treatment | Environmental chromated, Regular chromated |
Regular Spangle: This is the most common finish, characterized by a visible crystalline pattern on the surface. It is created during the cooling process when the zinc coating solidifies.
Minimized Spangle: This finish has a smaller and less visible crystalline pattern compared to regular spangle. It is often used for applications requiring a more uniform appearance.
Factory: COSASTEEL is one of the best-galvanized steel coil suppliers and manufacturers in China, Our galvanized steel coil production line has an annual production capacity of 300,000 tons and a manufacturing speed of 150m/min.
Versatile Applications: Perfect for construction, manufacturing, and more. Whether you need material for roofing, wall panels, or structural components, our coils are up to the task.
Superior Corrosion Resistance: The zinc coating provides a robust barrier against rust and corrosion, extending the lifespan of your projects.
Zinc coating: 275 gsm(min), Thickness: 0.40 mm(min), Grade: en 10346 DX51D
Zinc coating: 275 gsm(min), Thickness: 1.50 mm(min), Grade: EN 10346 S550GD
Zinc coating: 180 gsm(min), Thickness: 0.60 mm(min), Grade: EN 10346 dx51d
Zinc coating: 275 gsm(min), Thickness: 1.00 mm(min), Grade: EN 10346 dx51d
Our galvanized steel coils are manufactured strictly in accordance with ASTM A653, EN 10346, and AS 1397 standards. Below are the available steel grades and mechanical properties.
Mechanical Requirements for Commercial steel (CS Types A, B, and C)
Designation | Yield Strength | |
---|---|---|
ksi | [MPa] | |
CS Type A | 25/55 | [170/380] |
CS Type B | 30/55 | [205/380] |
CS Type C | 25/60 | [170/410] |
Mechanical Requirements for Structural Steel(SS)
Designation | Grade | Yield Strength, min,ksi | Tensile Strength, min,ksi |
---|---|---|---|
SS | 33 | 33 | 45 |
37 | 37 | 52 | |
40 | 40 | 55 | |
50 Class 1 | 50 | 65 | |
50 Class 2 | 50 | … | |
50 Class 3 | 50 | 70 | |
50 Class 4 | 50 | 60 | |
55 | 55 | 70 | |
60 | 60 | 70 | |
70 | 70 | 80 | |
80 | 80 | 82 |
Mechanical properties of low carbon steels for cold forming
Designation | Yield strength (MPa) | Tensile strength (MPa) | Elongation % min. |
||
---|---|---|---|---|---|
Steel grade | Symbols for the types of available coatings | ||||
Steel name | Steel number |
||||
DX51D | 1.0917 | +Z,+ZF,+ZA,+ZM,+AZ,+AS, | – | 270 to 500 | 22 |
DX52D | 1.0918 | +Z,+ZF,+ZA,+ZM+AZ,+AS | 140 to 300° | 270 to 420 | 26 |
Mechanical properties of steels for construction
Designation | Mechanical properties | ||||
---|---|---|---|---|---|
Steel grade | Symbols for the types of available coatings | Proof strength (MPa) min. | Tensile strength (MPa) min. | Elongation % min. |
|
Steel name | Steel number | ||||
S220GD | 1.0241 | +Z,+ZF,+ZA,+ZM,+AZ | 220 | 300 | 20 |
S250GD | 1.0242 | +Z,+ZF,+ZA,+ZM,+AZ,+AS | 250 | 330 | 19 |
S280GD | 1.0244 | +Z,+ZF,+ZA,+ZM,+AZ,+AS | 280 | 360 | 18 |
S320GD | 1.0250 | +Z,+ZF,+ZA,+ZM,+AZ,+AS | 320 | 390 | 17 |
S350GD | 1.0529 | +Z,+ZF,+ZA,+ZM,+AZ,+AS | 350 | 420 | 16 |
S390GD | 1.0238 | +Z,+ZF,+ZA,+ZM,+AZ | 390 | 460 | 16 |
S420GD | 1.0239 | +Z,+ZF,+ZA,+ZM,+AZ | 420 | 480 | 15 |
S450GD | 1.0233 | +Z,+ZF,+ZA,+ZM,+AZ | 450 | 510 | 14 |
S550GD | 1.0531 | +Z,+ZF,+ZA,+ZM,+AZ | 550 | 560 | – |
Formability grade
Steel grade designation | Transverse tensile test | Transverse bend test | Thickness range for lockseam(mm) |
|
Min.elongation,% | Degree of bend | |||
on 50 mm | on 80 mm | |||
G1 | – | – | 180° | – |
G2 | 30 | 27 | 180° | ≤1.60 |
G3 | 35 | 32 | 180° | All |
Structural grade
Steel grade designation | Longitudinal tensiletest | Transverse bend test | ||||
Min.yield strength (MPa) | Min.tensile strength (MPa) | Min. elongation,% | Angle of bend degrees | Diameter of mandrel in terms of test piece thickness(t) |
||
Lo=50mm | Lo=80mm | |||||
G250 | 250 | 320 | 25 | 22 | 180 | 0 |
G300 | 300 | 340 | 20 | 18 | 180 | t |
G350 | 350 | 420 | 15 | 14 | 180 | 2t |
G450 | 450 | 480 | 10 | 9 | 90 | 4t |
G500 | 500 | 520 | 8 | 7 | 90 | 6t |
G550 | 550 | 550 | 2 | 2 | – | – |
Here are the common questions that you may want to know.
721049
Check tariffs before ordering from China.
The life of galvanized steel coil depends on the end application and environment, as well as the weight of zinc. For example, the life of z275 galvanized roof in a marine environment is 5 years.
The life of z180 cable tray in an indoor environment is 15 years.
The price of galvanized steel coil depends on the raw material hot-rolled, the zinc weight, and the width and thickness of the coil.
For galvanized strip, the quality of its quality mainly depends on the material and heat treatment of the strip, as well as the amount of zinc applied to hot-dip galvanizing. , 120 grams, at present, the weight of zinc in many factories is only about 40 grams, and the weight of zinc directly affects the anti-corrosion ability.
For the galvanized strip steel with poor quality, there are cracks on the surface, which are mostly caused by cracks and poor annealing, and the material is too hard.
Ready to elevate your projects with the galvanized steel coils on the market? Contact us today to learn more about our products, request a quote, or place an order.
Experience the difference that quality and expertise can make.
Or Send an email to sales@cosasteel.com
Copyright COSASTEEL | All Rights Reserved