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Special Steel Property
Please refer to the explanation of product's characteristics when ordering.
Basic Property
| Tool steel for cold working(SKD11) | Tool steel for hot working(SKD61) |
|---|---|
| High clean level & high quality | Excellent ductility & Red strength |
| Excellent resistance to abrasion | Excellent resistance to abrasion |
| Even structure | Minimum level of transformation for heat processing |
| Even hardness | Suitable for dies steel due to its high containment of "V" |
| High strength | High strength |
Chemical components
| C | Si | Mn | P | S | Ni | Cr | Mo | V | |
|---|---|---|---|---|---|---|---|---|---|
| SKD11(for cold working) | 1.4 | ≤ 0.4 | ≤ 0.6 | ≤ 0.03 | ≤ 0.03 | ≤ 0.5 | 11.0 | 0.80 | 0.20 |
| 1.6 | 13.0 | 1.20 | 0.50 | ||||||
| SKD61(for hot working) | 0.32 | 0.08 | ≤ 0.5 | ≤ 0.03 | ≤ 0.03 | ≤ 0.25 | 4.5 | 1.00 | 0.8 |
| 0.42 | 1.2 | 5.5 | 1.5 | 1.2 | |||||
| SK3(carbon tool steel) | 1.00 | ≤ 0.35 | ≤ 0.5 | ≤ 0.03 | ≤ 0.03 | ||||
| 1.10 |
Heat processing conditions & hardness
| Heat processing temperature(℃) | Hardness | ||||
|---|---|---|---|---|---|
| Annealing | Quenching | Tempering | Annealing(HB) | QT(HRC) | |
| SKD11 | 830 ~ 880℃ SLOW COOLING | 1000 ~ 1050℃ AIR COOLING | 500 ~ 530℃ AIR COOLING | 255 Max | Min 58 |
| SKD61 | 820 ~ 870℃ SLOW COOLING | 1000 ~ 1050℃ AIR COOLING | 550 ~ 650℃ AIR COOLING | 229 Max | Min 53 |
| SK3 | 750 ~ 780℃ SLOW COOLING | 760 ~ 820℃ 수냉 | 150 ~ 200℃ AIR COOLING | 212 Max | Min 63 |
Usage
| SKD11 | SKD61 | SK3 |
|---|---|---|
| Dies for cold working, Press, Call, Pressure dies | EXTRUSION DIE CASTING RACK | Press mold, TOOL HOLDER |