Hardened & Tempered Steel
Hardened & Tempered Steel are made by heat-treating and cooling cold-rolled steel at high temperatures to adjust to the desired hardness and tensile strength as our customers require.
Dongkuk Industries' Hardened & Tempered Steel caters to materials requiring high strength for automobiles and industrial uses, meeting sophisticated and enhanced customer needs. We possess the highest-quality eco-friendly hydrogen quenching heat treatment facilities, producing top-quality products through precise control of the latest equipment and shape control. We supply products with the utmost durability and highest wear resistance, such as Flapper Valves, Shock Absorbers, and Cushion Plates, to the world. Due to these characteristics, they are used as critical materials in various industrial sectors.
Download PDF
| Grade | Microstructure | Tolerance ※ Varies with thickness |
|---|---|---|
| S35C~S75C | 1. Martempering (Martensite) Bright / light yellow Surface 2. Austempering (Bainite) Grey – Blue Surface 3. Patenting (Sorbite) Bright Surface |
1600~2300N/mm2 (Max. ±30) |
| SK | ||
| SCM | 1300N/mm2 (Max. ±40) |
|
| SKS | ||
| Spring | 1100~1300N/mm2 (Max. ±40) |
Dimension
(mm)
| Thickness | Width |
|---|---|
| 0.1 ~2.5 | 80~450 |
Martempering : Martensite
Flapper Valve
Shock Absorbers
Saw Blades (Wood / Stone Processing)
Circular Tanks
Austempering : Bainite
Precision Automotive Parts
Leather and Paper Punching Dies
Molds and Fabric Cutters
Patenting : Sorbite
Vehicle Safety Belt Springs
Cable Drum Springs
High-Strength Helical Springs
