Die materials
We supply die materials designed to meet our customers' needs.
Characteristics
SD steel as plastic forming die material
- Pure steel made with a special refining method is used.
- Optimal heat treatment is used to produce steel material with little treatment distortion.
- Using fixed forging greater uniformity of the inside and outside structures is achieved.
Fixed forging reduces directionality.
- Carrying out special treatment, surface texturing is improved.
- Using shape forging, we can make materials that are close to the shape of the product.
Examples of shaped products
Die materials for hot forging SDH steel / DK steel
- We have the largest crankshaft forging line in Japan. We supply die materials based on the experience we have gained in its operation.
- We select die materials and surface treatments based on the knowledge we have acquired from the results obtained in the operation of our own line.
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Types and applications of SD steel
| Steel types | Standard | Hardness Hs (HRC) | Applications |
|---|---|---|---|
| SD18T | JIS S55C improved | 30±2 (13) | S55C free-cutting steel with high thermal conductivity |
| SD77 | AISI P20 equivalent | 41 - 46(31) | P20 equivalent material with good weldavility, machinability and wear-resistance |
| SD100 | − | 47±2 (34) | wear-resistance |
Mechanical properties of SD steel
| Steel types | Yield point (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Reduction of area (%) |
Impact value (J/cm2) |
Hardness (Hs) |
|---|---|---|---|---|---|---|
| SD18T | 430 | 720 | 25 | 47 | 38 - 44 | 30 |
| SD61 | 666 | 872 | 22 | 63 | 88 - 196 | 38 |
| SD77 | 859 | 969 | 19 | 49 | 41 - 46 | 42 |
| SD100 | 911 | 1078 | 18 | 55 | 49 - 69 | 47 |
Die materials for hot forging SDH steel / DK steel
| Standard | Steel types | Properties | Applications | |||
|---|---|---|---|---|---|---|
| Wear-resistance | Heat-cracking resistance | Fracture-resistance | Machinability | |||
| SKT4 improved | SDH21 | B | B | B | A | For hammer forging |
| SKD61 improved | SDH3 | B | A | A+ | B | For hot forging |
| DK65 | A | A | B | B | ||
| SDH52 | A | A | B | B | ||
Super [A＋・A・B・C] Inferior
For further product information
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