Are Rollers Made from SCM440H Steel Stable?

1. What Are Rollers?

Rollers are critical components commonly used in various rolling production lines. They are also referred to as:

- Rolling shafts

- Rolling rollers

- Rolling cylinders

Rollers are typically utilized in the following production processes:

- Plastic film rolling

- Steel rolling shafts

- Aluminum composite panel rolling

- Paper rolling rollers

- Other production lines in food processing, packaging, and printing industries

2. How Do Rollers Work and What Is Their Operating Environment?

Rollers function by guiding steel through the gap between two rollers, gradually changing the steel's shape as it makes contact with them.

During operation, rollers endure friction, wear, and heat generation, making them prone to cracking or breaking under stress.

This leads to the critical question: What is the most suitable material for rollers?

3. Why Should SCM440H Steel Be Used for Rollers?

Currently, many manufacturers produce rollers in diverse sizes, shapes, and materials.

As mentioned earlier, rollers operate in environments with high friction and wear. Rollers made from standard carbon steel, such as S45C, often experience cracking, breaking, or excessive wear over time. This results in frequent repairs, replacements, and increased material costs.

To address these issues and improve product longevity while reducing costs, many companies have turned to alloy steels like SCM440H.

Why SCM440H Steel?

SCM440H is a chromium-molybdenum steel produced by Hyundai. It is widely used in mechanical manufacturing and precision machining, such as for gears, anchor bolts, etc.

Adding chromium and molybdenum to the steel's composition significantly enhances its properties compared to standard carbon steels like S45C:

- High Wear Resistance: The chromium content (0.9%–1.2%) greatly improves resistance to wear.

- Heat Resistance: Molybdenum content (0.15%–0.3%) increases the product's heat resistance.

- Balanced Toughness and Hardness: The combination of chromium and molybdenum ensures a balance between hardness and ductility, reducing the risk of cracking or breaking.

- Hardness: SCM440H steel can achieve a hardness of 52–55 HRC.

Why Choose SCM440H for Rollers?

For the above reasons, using SCM440H steel for rollers is recommended to enhance product efficiency, extend service life, and reduce material costs.

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