In many high-temperature applications such as heat exchangers, recuperators, industrial furnaces, and exhaust systems, material selection plays a key role. Alongside heat-resistant materials like SUS304 and SUS310, aluminized steel has emerged as a popular optimal solution, thanks to its combination of heat resistance, corrosion resistance and reasonable cost.
This article provides an overview of Aluminized Steel—an ideal heat-resistant material for high-temperature applications—highlighting in particular the Daiwa Aluminized Steel Pipe produced by Daiwa Lance International Co., LTD.
Daiwa Aluminized Steel is carbon steel coated with aluminum-iron or aluminium-silicon alloys on the surface. This coating improves the heat resistance and corrosion protection for steel pipes, making them an ideal choice for a variety of applications, including in automotive exhaust systems, ovens, heat exchangers, and industrial furnaces.
Daiwa Aluminized Steel is suitable for applications with the following requirements:
Aluminized steel pipes with a layer of aluminium-iron alloy over the surface are excellent in heat resistance, especially at the medium to high temperature range from 600 oC to 900 oC in recuperators.
The aluminum coating forms a stable Al₂O₃ oxide layer, allowing aluminized steel to maintain thermal performance over long periods.
These properties make it particularly suitable for heat exchangers, recuperators, hot-air ducts, combustion chambers, and heating equipment.
Aluminized steel pipes with a layer of aluminium-iron alloy over the surface provides high resistance to corrosion which prolong lifespan in harsh conditions.In hot-gas environments containing oxygen, steam, or other oxidizing agents, aluminized steel offers significantly higher durability than many other coated materials.
Aluminized steel pipes with an aluminium–iron alloy layer on the surface offer good thermal conductivity, making them a suitable alternative to stainless steel.
The thermal conductivity of aluminized steel is higher than that of many conventional steels and is well suited for heat-transfer systems.
Compared with high-grade stainless steels such as SUS304, SUS310, aluminized steel offers significant economic advantages.
Aluminized steel pipes with an aluminium–iron alloy layer over a carbon-steel base are produced through the calorizing process, which is much less expensive than stainless-steel manufacturing. Therefore, Daiwa Aluminized Steel are considerably cheaper than stainless steel pipes.
When used within the recommended temperature range (up to 650°C), aluminized steel ensures long-lasting equipment performance at a much lower cost.
| Feature | Stainless Steel | Aluminized Steel |
Galvanized Steel |
| Heat Resistance |
Very High |
Very High (Up to 650oC) | Poor |
| Thermal Conductivity |
Good |
Good | Poor |
| Cost |
Very High (Especially SUS310) |
Significantly lower than high-grade stainless steels (SUS304, SUS310). | Low Cost |
| Oxidation Resistance | Very Good |
Good |
Poor |
| Coating Stability |
NOT Applicable |
Stable coating, does not peel or flake like galvanized steel |
Unstable, produces toxic zinc fumes at high temperatures. |
| Conclusion | Suitable for application requiring very high temperatures or maximum material durability. | Optimal balance between performance and cost in medium temperature systems (under 650oC) | NOT suitable for heat exchanger and recuperator systems. |
Aluminized steel is an optimal choice when a heat-resistant steel with excellent heat tolerance, durable oxidation resistance, and reasonable cost is required. In systems such as heat exchangers and recuperators, this material provides the perfect balance between performance and economy, making it a trusted solution for many engineers and designers.
Contact Daiwa Lance International Co., LTD today. We are a manufacturer and supplier of aluminized steel products with superior high-temperature resistance, excellent thermal performance, and cost-effectiveness.