SKD10 and SKD11 steel
SKD10 and SKD11 steels are high carbon and high chromium cold working alloy tool steels with good hardenability, small heat treatment deformation, high hardness, high wear resistance and impact resistance.
Material properties
The following table lists the properties of SKD10 and SKD11 materials, including chemical composition, physical composition and hardness, etc.
Chemical composition
The chemical composition of SKD10 and SKD11 steels is listed in the following table.
| Chemical composition, % | |||||||||
| Standard | Steel | W | Yes | Mn | P, ≤ | S, ≤ | Cr | Mo | V |
| JIS G4404 | SKD11 | 1.40-1.60 | ≤0.40 | ≤0.60 | 0.030 | 0.030 | 11am-1pm | 0.80-1.20 | 0.20-0.50 |
| JIS G4404 | SKD10 | 1.45-1.60 | 0.10-0.60 | 0.20-0.60 | 0.030 | 0.030 | 11am-1pm | 0.70-1.00 | 0.70-1.00 |
| ASTM A681 | D2 | 1.40-1.60 | 0.10-0.60 | 0.10-0.60 | 0.030 | 0.030 | 11am-1pm | 0.70-1.20 | 0.50-1.10 |
Physical properties
The physical properties of SKD11 material are listed in the table below, including density, melting point, specific heat, modulus of elasticity (modulus of elasticity) and coefficient of thermal expansion (CTE).
Grades:
- 10 -6 ·K -1 = 10 -6 /K
- 1Ω mm²/m = 1 μΩ m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1kN/mm2
- 1 MPa = 1 N/mm2
| SKD11 Physical Properties | |
| Density, g/cm3 (lb/in3) | 7.80 (0.282) |
| Melting point, °C (°F) | 1420 (2590) |
| Elastic Modulus (Modulus of Elasticity), GPa (106 psi) | 207 (30) |
| Thermal conductivity, W/m·K (Btu/ft · h ·°F) | 26.1 (15.09) |
| Coefficient of thermal expansion (CTE), μm/m·K | 12.0 |
SKD10 and SKD11 heat treatment
girdling
Annealing temperature of SKD10 and SKD11 tool steel: 830 to 880 °C (1526-1616 °F), slow cooling, annealed hardness: ≤255 HB.
Hardening and Tempering
- SKD10 – Quenching temperature: 1020±10 °C air cooling; Quenching temperature: 180±10°C air cooling; Quenched and tempered hardness: 720 HV.
- SKD11 – Quenching temperature: 1030±10 °C air cooling; Quenching temperature: 180±10°C air cooling; quenched and tempered hardness: 653 HV.
Forms
Typical applications include
- Blind mold
- Polishing Tools
- Casting Mold
- Drawing Template
- Drawing matrix
- Forming mold
- Crimping die
- Hot forging dies
- Laminated Mold
- Line Lamination Die
- cutting template
- Cold Extrusion Die
- Measure Tool
- Lathe Center
- Punch
- Forming and folding rolls
- Rotary Tools
- serrated
- Cutting knife
- Address
- Wear plate
- Chuck
- Knives
- Shear blades, etc.
Equivalent material SKD10 and SKD11
SKD10 and SKD11 tool steel equivalent to US ASTM, European EN (Germany DIN, British BSI, French NF…), ISO, and Chinese standard GB (for reference).
| Equivalent material SKD10 and SKD11 | |||||||||||||||||
| Japan | USA | European | ISO | China | Australia | India | Russia | Korea | |||||||||
| Standard | Steel | Standard | AISI (UNS) | Standard | Steel Number (Steel Name) | Standard | Steel Number (Steel Name) | Standard | Name | Standard | Note | Standard | Note | Standard | Note | Standard | Note |
| JIS G4404 | SKD10, SKD11 | AISI, ASTM A681 |
D2 (T30402) | EN ISO 4957 | 1.2379 (X153CrMoV12) | ISO 4957 | 1.2379 (X153CrMoV12) | GB/T 1299 | Cr12Mo1V1 | ||||||||
Note: The chemical composition of SKD10 is closer to D2, 1.2379 and Cr12Mo1V1 than SKD11 steel. SKD11 was added to this table because it is much more commonly used than SKD10 in Japan.
