High-Quality SCM440H Solid Round Steel for Transmission Shafts with Superior Friction Resistance

The Importance of Transmission Shafts in Machinery

How crucial are transmission shafts in machinery? Their importance lies in being an indispensable component in most machines. Depending on their structure and application, transmission shafts often endure forces such as tension, friction, and torsion. Hence, the steel billets used for shafts must meet specific mechanical requirements.

Sevit provides essential information about SCM440H solid round steel, a high-quality, friction-resistant material for transmission shafts, giving you an excellent option for your products.

Common Types of Transmission Shafts on the Market

What is a Transmission Shaft?

A transmission shaft is a component that withstands bending moments (supporting rotating parts) and torsional moments to transmit motion, ensuring smooth and efficient machine operation.

There are two primary types of shafts:

- Driving Shafts: Carry moving components such as gears, chains, and belts.

- Main Shafts: Support operational parts such as cutting tools or stirring blades.

Additionally, some machinery uses universal shafts, which transmit torque from a power source to multiple working machines.

Due to this role, transmission shafts often operate under tension, friction, torsional forces, and wear. These conditions impose strict requirements on the materials used to manufacture the shafts. The material must strike a balance between high hardness and ductility to avoid breakage during operation.

Transmission Shafts Made from SCM440H Steel

Based on theoretical research and practical application, Sevit has found that SCM440H solid round steel enhances the quality and friction resistance of transmission shafts. 

Why is SCM440H Steel Ideal for High-Quality Transmission Shafts?

Before using SCM440H, some Sevit customers relied on carbon steels such as S45C and S50C. However, these materials often led to shaft failures (e.g., fractures, cracks, deformation, or wear) after a short usage period. This necessitated costly repairs and replacements.

To address these issues and improve product quality, many mechanical workshops switched to alloy steel instead of carbon steel.

SCM440H solid round steel is a popular alloy steel grade used in machinery manufacturing and precision mechanical processing. Common applications include gears, anchor bolts, guide rails, and molds.

Chemical Composition of SCM440H

SCM440H, also known as Chromium-Molybdenum steel, derives its name from its chemical composition, which includes Chromium and Molybdenum. These elements significantly enhance the mechanical properties of the steel:

- Chromium: Improves wear resistance (0.9% - 1.2% in SCM440H).

- Molybdenum: Enhances heat resistance (0.15% - 0.3% in SCM440H)

Enhancing Durability of SCM440H for Transmission Shafts

In addition to selecting the right steel grade, heat treatment is commonly used to increase the durability of transmission shafts. After processes like induction hardening or oil quenching, the hardness of SCM440H steel can reach 52 HRC - 55 HRC, significantly improving performance.

With this information, Sevit hopes you now better understand SCM440H steel and why it helps extend the lifespan of transmission shafts. Start saving costs and time today with SCM440H by contacting Sevit:

  * Tel: +84 332 91 61 61

  * Email: sales@sevit.vn 

  * Zalo: Sevit Special Steel