- Description
Description
AS120 aluminized steel coil represents a balanced aluminium-silicon coating class designed to provide reliable oxidation protection while maintaining reasonable material efficiency. In the EN coating classification system, AS120 is widely selected for industrial components that require heat resistance, corrosion protection, and stable forming performance.
Understanding what AS120 means, how coating weight is verified, and where it fits compared with lighter or heavier coating classes helps buyers select the right aluminized steel solution for different service environments.
What Does AS120 Mean in Aluminized Steel?
The “AS” designation refers to an aluminium-silicon coating system, while “120” represents the nominal coating mass classification. AS120 normally indicates a total coating weight of approximately 120 g/m² on both sides combined.
| Item | AS120 Requirement |
|---|---|
| Coating Type | Aluminium-silicon alloy coating |
| Nominal Coating Weight | 120 g/m² total both sides |
| Approximate Coating Thickness | Around 17–20 μm per side |
| Main Advantage | Balanced oxidation resistance and material efficiency |
The actual coating thickness can vary depending on production conditions, coating distribution, and measurement methods. Therefore, coating mass verification is more reliable than judging only by visual appearance.
AS Coating Weight Classification Overview
Aluminized steel products are available in different coating classes. The correct selection depends on temperature exposure, corrosion environment, and expected service life.
| Coating Class | Protection Level | Typical Use |
|---|---|---|
| AS60 | Light protection | General low-demand applications |
| AS90 | Medium protection | Moderate industrial components |
| AS120 | Balanced protection | General industrial and heat-resistant parts |
| AS150 | Higher protection | Longer oxidation resistance requirements |
| AS200 | Heavy protection | Severe environments and extended service life |
Why AS120 Is Considered the Balanced Choice
AS120 is positioned between light-duty and heavy-duty coating classes. It provides enough aluminium-silicon protection for many industrial applications without requiring the highest coating weight.
The main advantages include:
- Good oxidation resistance under elevated temperatures
- Stable aluminium oxide protective layer formation
- Suitable coating thickness for forming operations
- Balanced protection for general industrial applications
For many applications, AS120 provides a practical solution where extremely heavy coating protection is unnecessary.
Typical Applications of AS120 Aluminized Steel
AS120 aluminized steel coil is commonly used in components exposed to heat, oxidation, and industrial environments.
| Application | Reason for Selection |
|---|---|
| Oven inner liners | Heat resistance and oxidation protection |
| Heater housings | Maintains performance under repeated heating cycles |
| Heat shields | Protects components from high-temperature exposure |
| Automotive exhaust middle sections | Provides oxidation resistance in exhaust environments |
How to Verify AS120 Coating Weight
Coating weight verification is an important purchasing inspection step. The coating classification should be confirmed through testing rather than appearance inspection.
The commonly used method is the coating removal and weighing method:
1. Measure the original sample weight.
2. Remove the aluminium-silicon coating using a suitable chemical method.
3. Measure the remaining steel substrate weight.
4. Calculate the coating mass difference.
| Inspection Item | Purpose |
|---|---|
| Coating mass test | Confirm AS120 classification |
| Thickness measurement | Check coating distribution |
| Surface inspection | Identify coating defects |
AS120 vs AS150: Which One Should You Choose?
The selection between AS120 and AS150 depends on the operating environment and required service life.
| Factor | AS120 | AS150 |
|---|---|---|
| Protection Level | Balanced | Higher |
| Service Condition | Normal heat exposure | Longer oxidation resistance |
| Selection Logic | Standard industrial use | More demanding environments |
Purchasing Guide for AS120 Aluminized Steel Coil
A complete purchase specification should include coating class, steel grade, dimensions, and inspection requirements.
AS120 aluminized steel coil, aluminium-silicon coating, specified thickness, width, coil weight, mechanical requirements, and coating inspection requirements.
Clear specification writing helps prevent coating class confusion and ensures the supplied material matches the application requirements.
Teda Ganghua AS120 Aluminized Steel Coil Supply Support
Teda Ganghua provides aluminized steel material solutions with specification confirmation, quality inspection support, and processing services for industrial customers. For projects requiring stable supply of aluminized steel coil, customers can receive assistance with coating grade selection, technical requirements, and customized processing solutions.
FAQ About AS120 Aluminized Steel Coil
1. What does AS120 mean in aluminized steel?
AS120 refers to an aluminium-silicon coating class with a nominal coating mass of approximately 120 g/m² on both sides combined.
2. Is AS120 suitable for high-temperature applications?
Yes. AS120 provides oxidation resistance and is commonly used for heat-resistant industrial components.
3. What is the difference between AS120 and AS150?
AS150 has a heavier coating and provides longer protection, while AS120 offers balanced performance for general applications.
4. How is AS120 coating weight verified?
Coating weight is typically verified by removing the coating and calculating the weight difference between coated and uncoated samples.
5. Which industries use AS120 aluminized steel?
Common applications include ovens, heaters, heat shields, exhaust components, and industrial heat-resistant parts.
