Types of AS Iron and Their Differences for Project Needs

AS (Assental Steel) is a solid, round steel material widely used in the construction and manufacturing industries, including machine component manufacturing. Due to its strength, solidity, and malleability, AS steel is the primary choice for various engineering applications.

However, not all AS steel has the same specifications. Each type has different characteristics and uses. Below is a complete explanation of the commonly used AS steel types and their differences.

1. Black AS Steel
Black AS steel is the most commonly used type for general construction needs.

Characteristics:

• Darker or blackish color
• Not galvanized or coated
• More economical price

Suitable for:

• Simple shafts
• Folding fence components
• Machine mounts
• Light construction applications

2. Plain AS Steel / Bright Bar
This type has a smoother finish and high precision due to the cold drawing process.

Characteristics:

• Brighter and smoother surface
• More precise diameter
• Higher tensile strength

Suitable for:

• Precision machine components
• Industrial tool handles
• Motor shafts
• Automotive parts

3. Stainless Steel AS
This type is made of stainless steel, making it corrosion-resistant and has a cleaner appearance.

Characteristics:

• Anti-rust
• Shiner surface
• Suitable for humid or outdoor areas

Suitable for:

• Food and pharmaceutical components
• Building ornaments
• Outdoor applications exposed to the weather
• Structures requiring hygiene

4. Hard Chrome AS
This type has a hard chrome coating on its surface, making it highly abrasion-resistant.

Characteristics:

• High resistance to friction
• Better rust resistance
• Excellent wear resistance

Suitable for:

• Hydraulic rods
• Heavy industrial machinery
• Heavy equipment components
• Hydraulic and pneumatic systems

5. S45C AS Steel
This type is classified as a medium carbon steel with a high level of strength.

Characteristics:

• Hard yet malleable
• Suitable for heat treatment
• High tensile strength

Suitable for:

• Gears
• Industrial machine shafts
• Bolts and automotive components
• Structures requiring high loads

Main Differences Between AS Steel Types
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Conclusion
The choice of AS steel type should be tailored to the project needs. If corrosion resistance is required, choose stainless. For high precision, use bright bar. Meanwhile, for heavy machinery and hydraulics, hard chrome is the best choice.

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