When it comes to industrial materials that demand exceptional strength and durability, hardened and tempered (H&T) steel strips stand out as a cornerstone for high-performance applications. These strips undergo specialized thermal processing to achieve a unique balance of toughness and hardness, making them indispensable in industries ranging from construction to automotive manufacturing. In this blog, we explore the science behind H&T steel strips, their technical specifications, and how they drive efficiency in critical industrial applications.
The Hardening & Tempering Process: Precision Meets Performance
The production of hardened and tempered steel strips involves a two-step thermal treatment:
- Hardening: Steel strips are heated above their critical transformation temperature (specific to the alloy) and rapidly cooled. This creates a martensitic structure, resulting in extreme hardness but brittleness.
- Tempering: To reduce brittleness, strips are reheated to a lower temperature (typically 150–650°C) and held for a controlled duration. This step enhances toughness while retaining hardness, achieving a final hardness range of 30–55 HRC.
Key Benefits of H&T Steel Strips:
- High Toughness: Resists cracking under stress, ideal for dynamic loads.
- Optimized Hardness: Balances wear resistance and machinability.
- Oxidation-Free Surface: Processed in inert atmospheres for clean, durable finishes.
- Customizable Edges: Slit, rounded, or square edges for safety and precision.
Industrial Applications of H&T Steel Strips
H&T steel strips are engineered to meet rigorous demands across industries. Below are standout use cases:
1. Rolling Shutter Door Springs
H&T steel strips, particularly grades likeC67S, C75S, and C80, are renowned for their flexibility and fatigue resistance. These strips ensure smooth operation of shutter doors even after thousands of cycles. Guangzhou Jiaxiao MTC, a leading industrial steel supplier, exportshundreds of tons annually for this application, with strict quality checks on thickness (e.g., 1.00–1.40mm), hardness (30–55 HRC), and edge treatments to prevent failure.
2. Saw Blades and Cutting Tools
Blades for band saws, hack saws, and circular saws rely on H&T strips for sharpness and longevity. Grades like50CrV4, 60Si2Mn, and 75Cr1 are hardened to 45–55 HRC, ensuring clean cuts in wood, metal, and stone. The edge treatments (slit or rounded) minimize burrs, critical for precision cutting.
3. Automotive Components
Fromclutch discs toseat belt springs, H&T strips provide the resilience needed for high-stress environments. Their dimensional stability (thickness: 0.1–5.00mm; width: 2–500mm) allows customization for tight-tolerance parts.
4. Construction and Tooling
Scrapers, trowels, and putty knives use H&T strips for abrasion resistance. Surface finishes likeblue, yellow, or polished enhance corrosion resistance in harsh job sites.
Technical Specifications for Industrial Use
Guangzhou Jiaxiao MTC’s H&T steel strips meet exacting standards:
- Dimensions:
- Thickness: 0.10–5.00mm
- Width: 2–500mm
- Hardness: 30–55 HRC (customizable)
- Edge Treatments: Slit, rounded, or square edges for safety and functionality.
- Surface Finishes: Natural, polished, or colored (blue/yellow) options.
For shutter springs, common specifications include:
| Dimension (mm) | Load Capacity |
|---|---|
| 60 x 1.40mm | 39kg |
| 55 x 1.20mm | 26kg |
| 40 x 1.00mm | 13kg |
Why Choose a Trusted Industrial Steel Supplier?
Guangzhou Jiaxiao Material Technology Co., Ltée. combines20+ years of expertise with ISO-certified raw materials and advanced facilities. Their success stories include:
- Supplying 15,000 tons annually to global industries.
- Delivering strips with ±0.015mm thickness tolerance for precision tooling.
- Customizing alloys (e.g., 50CrV4, 60Si2Mn) to meet unique project needs.
Conclusion
Hardened and tempered steel strips are the backbone of industrial innovation, offering unmatched durability for applications where failure is not an option. By partnering with a reliableindustrial steel supplier like Guangzhou Jiaxiao MTC, businesses gain access to tailored solutions that enhance productivity and reduce downtime.
