Aluminized Steel

Aluminized Steel is a premium coated steel product manufactured through a hot-dip aluminium or aluminium–silicon coating process. In this process, cold-rolled or mild steel is immersed in molten aluminium or an aluminium–silicon alloy, forming a strong metallurgical bond with the steel substrate.

The aluminium coating provides excellent corrosion resistance, high heat reflectivity, and long service life, while the steel base ensures strength, formability, and cost efficiency. Aluminized steel is widely used in applications exposed to high temperatures, moisture, and harsh industrial environments.

Standard: ASTM A463 – Aluminized Steel Sheet & Coil

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Product Details

Parameter	Specification
Product	Aluminized Steel Coil / Aluminized Steel Sheet
Shape	Coil / Sheet
Color	Silver
Packaging	Export-worthy metal packaging
Applications	Automotive, Engineering & Industrial Uses

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Dimensional Range

Specification	Range
Thickness	0.15 mm – 4.50 mm
Standard Thickness (ASTM A463)	0.20 mm – 2.50 mm
Width	Up to 1500 mm (≈ 60 inches)

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Coating Specifications

Coating Type	Coating Weight / Designation
Type 1 – Aluminium–Silicon Coated Steel	60 GSM – 310 GSM
ASTM Designations	T1-13, T1-25, T1-40, T1-60
Type 2 – Pure Aluminium Coated Steel	0.65 Oz / Sq. Ft

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Grades Available

• SA1C, SA1D, SA1E
• DX51D, DX53D, DX54D, DX56D
• CS (A & B), DDS, EDDS, EDDS+
• Structural Steel, HSLA

Surface Finish Options

• Oiled
• Dry
• Chemical Treated

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Type 1 – Aluminium–Silicon Coated Steel

Type 1 aluminized steel is hot-dip coated with an aluminium–silicon alloy containing 5%–11% silicon. This coating improves adhesion and provides excellent heat resistance and corrosion protection.

Applications of Type 1 Aluminized Steel:

• Automotive exhaust systems and mufflers
• Industrial furnaces, ovens, and heaters
• Water heaters and fireplaces
• Cooking and baking equipment

Best suited for heat-resistant and high-temperature applications.

Type 2 – Pure Aluminium Coated Steel

Type 2 aluminized steel is coated with commercially pure aluminium and is primarily designed for atmospheric corrosion resistance.

Applications of Type 2 Aluminized Steel:

• Roofing and wall cladding sheets
• Grain storage bins and silos
• Air-conditioner housings
• Industrial enclosures and drying ovens

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Key Features & Benefits

• Superior corrosion resistance in moisture-prone and outdoor environments
• High heat resistance (Type 1 withstands temperatures up to ~650°C / 1200°F)
• Excellent thermal reflectivity, improving energy efficiency
• Good formability and weldability using standard fabrication techniques
• Long service life with reduced maintenance requirements
• Clean, uniform silver appearance suitable for visible applications

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Applications

• Automotive exhaust systems and heat shields
• Industrial ovens, furnaces, and heat exchangers
• HVAC ducting and components
• Roofing, siding, and structural panels
• Household and commercial appliances

Aluminized steel offers an ideal balance of strength, heat resistance, and corrosion protection. It is widely preferred for automotive, industrial, HVAC, and construction applications due to its long-term reliability, reduced maintenance costs, and consistent performance in demanding service conditions.