- Description
Description
DX56D+AS aluminized steel is one of the highest formability grades in the EN 10346 aluminized steel family. It is mainly designed for complex deep-drawing applications where excellent shaping ability, corrosion resistance, and high-temperature oxidation protection are required.
The designation DX56D+AS contains important information about the steel grade, forming capability, and coating system. Understanding the EN naming system helps buyers select the correct material for automotive parts, heat-resistant components, and complex formed products.
How the EN 10346 DX56D+AS Designation Works
The EN 10346 designation system combines the base steel type, forming grade, and metallic coating information into one material name.
| Designation Part | Meaning |
|---|---|
| DX | Flat cold-forming steel products |
| 56 | High-strength forming grade classification |
| D | Cold forming quality designation |
| +AS | Aluminium-silicon coating system |
The complete designation tells engineers that the product is a cold-forming steel with an aluminium-silicon coating, manufactured according to EN 10346 requirements.
The DX+AS Aluminized Steel Family Explained
DX56D+AS belongs to a complete family of aluminized steel grades. The main difference between grades is their forming capability and mechanical performance.
| Grade | Forming Level | Typical Application |
|---|---|---|
| DX51D+AS | Structural / basic forming | General fabricated components |
| DX52D+AS | Improved forming | Moderate stamping parts |
| DX53D+AS | Deep drawing | Complex formed components |
| DX54D+AS | Advanced deep drawing | More demanding stamping operations |
| DX56D+AS | Extra deep drawing | Highly complex automotive formed parts |
DX56D+AS Position in Automotive Forming Applications
DX56D+AS is designed for applications where ordinary aluminized steel cannot provide enough forming flexibility. Its main advantage is the combination of excellent ductility and aluminium-silicon coating protection.
Typical applications include:
- Automotive exhaust system components
- Deep-drawn heat shields
- Complex stamped brackets
- High-temperature protective parts
- Industrial formed components requiring oxidation resistance
Understanding DX56D+AS Mechanical Performance
A common misunderstanding is that the “56” in DX56D+AS directly means a minimum yield strength of 560 MPa. In the EN 10346 system, the number mainly identifies the forming grade family rather than a simple yield strength value.
The actual mechanical requirements are determined by EN 10346 tables, including tensile strength, yield behavior, and elongation requirements.
| Property | Importance for DX56D+AS |
|---|---|
| Yield behavior | Controls deformation during stamping |
| Tensile strength | Determines final component strength |
| Elongation | Indicates deep-drawing capability |
| Coating adhesion | Maintains protection after forming |
Why Aluminium-Silicon Coating Is Used on DX56D+AS
The +AS coating is an aluminium-silicon alloy coating designed for high-temperature environments. Compared with conventional zinc coatings, aluminium-silicon layers provide better oxidation resistance at elevated temperatures.
• High-temperature oxidation resistance
• Stable protective aluminium oxide layer
• Suitable for exhaust-related environments
• Improved service durability under heat cycles
DX56D+AS vs DX51D+AS: How to Choose
The selection between DX56D+AS and DX51D+AS depends mainly on forming complexity.
| Comparison | DX51D+AS | DX56D+AS |
|---|---|---|
| Forming difficulty | Low to medium | Very complex deep drawing |
| Stamping requirement | Simple shapes | Complex geometry |
| Supply availability | More common | More specialized |
DX56D+AS Purchasing Specification Guide
A complete purchasing description should include the standard, grade, coating type, dimensions, and technical requirements.
EN 10346 DX56D+AS aluminized steel coil, coating designation AS, thickness, width, coil weight, surface requirement, and inspection documentation.
This prevents confusion during production and ensures that the supplied material matches the required forming performance.
DX56D+AS Supply Considerations
Compared with DX51D+AS, DX56D+AS is a more specialized forming grade. Because it requires tighter control of steel chemistry, mechanical properties, and processing conditions, availability may be more limited.
For projects requiring stable sourcing of aluminized steel coil, Teda Ganghua provides material selection support, specification confirmation, and customized processing solutions for industrial customers.
FAQ About DX56D+AS Aluminized Steel
1. What does DX56D+AS mean?
DX56D+AS refers to a cold-forming steel grade under EN 10346 with an aluminium-silicon coating system.
2. Is DX56D+AS stronger than DX51D+AS?
The main difference is forming capability. DX56D+AS is designed for more demanding deep-drawing applications.
3. What is the AS coating on aluminized steel?
AS means an aluminium-silicon coating that improves oxidation resistance in high-temperature environments.
4. Where is DX56D+AS commonly used?
It is commonly used for automotive exhaust components, heat shields, and complex stamped parts.
5. How should DX56D+AS be specified when purchasing?
The purchase document should include EN 10346, DX56D+AS grade, coating designation, dimensions, and inspection requirements.
