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Elevate your projects with the unparalleled strength and durability of Zinc Aluminum-Magnesium (ZAM) Steel. Engineered for excellence, ZAM steel redefines performance in the most demanding environments.
Zinc aluminum-magnesium (ZAM) coated steel is a type of steel that has been coated with a combination of zinc, aluminum, and magnesium to enhance its corrosion resistance. This coating is typically applied through a hot-dip galvanizing process, where the steel is submerged in a molten bath containing the three metals.
Zinc Coating | 40 -350 gsm(20-115 oz/ft²) |
Thickness | 0.5 - 2.2 mm |
Width | 50 - 860 mm |
Coil ID | 508/610mm |
Coil weight | 3-8 tons |
Composition | 3% Magnesium, 6% Aluminum, 91% Zinc |
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: 180 gsm(min), Thickness: 1.50 mm(min), Grade: EN 10346 S550GD
Our Zinc Aluminum-Magnesium (ZAM) Steel is manufactured strictly in accordance with ASTM A1046, 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.
Corrosion Resistance: Zinc Aluminum-Magnesium(ZAM) coated steel provides exceptional corrosion resistance, significantly outperforming conventional zinc-coated (galvanized) steel. The combination of zinc, aluminum, and magnesium creates a protective barrier that is more durable and less prone to corrosion, even in harsh environments.
Self-Healing Property: One of the standout features of zinc aluminum-magnesium(ZAM) coated steel is its self-healing property. When the coating is scratched or damaged, the exposed steel is protected by the formation of a stable and protective oxide layer, which helps to prevent further corrosion.
Enhanced Durability: The unique composition of the ZAM coating provides enhanced durability, making it suitable for applications that require long-lasting performance. It is particularly effective in environments with high humidity, salt spray, or industrial pollutants.
Improved Formability: ZAM coated steel maintains excellent formability, allowing it to be easily shaped and fabricated without compromising the integrity of the coating. This makes it ideal for a wide range of manufacturing processes and applications.
Zinc Aluminum-Magnesium(ZAM) steel sheets outperform galvanized and hot-dip zinc with 5% Al coated steel sheets in terms of red rust resistance. To prove this, ZAM products underwent outdoor exposure tests with galvanized and hot-dip zinc 5% Al steels in a rural environment at Kiryu-City, Gunma, and a coastal environment at Nakagusukuson+, Okinawa.
The exposure test lasted for a span of 8 years. In the rural setting, results revealed that the corrosion loss of ZAM coated steel is only at approximately 16-24 g/m², while zinc with 5% Al coated steel is at ~38-51 g/m², and the galvanized steel is at ~76-89 g/m².
In the coastal environment, the corrosion loss result of ZAM coated steels is ~33-43 g/m², zinc with 5% Al coated steel is at ~66-82 g/m², and the galvanized steel is at a high rate of ~105-115 g/m².
In conclusion, ZAM coated steels are up to four times more corrosion-resistant than galvanized and hot-dip zinc 5% Al coated steels.
Ready to elevate your projects with the Zinc Aluminum-Magnesium (ZAM) Steel 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
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