SKS7 tool steel china supplier and stockholders. Otai Special steel are supplier of SKS7 in steel round bar, plate, flat bar, square, block. SKS7 steel common use to cutting tool, knife, drill.
Chemical composition
he following table shows the chemical composition of SKS7 tool steel
| JIS | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | W(%) | V(%) |
| SKS21 | 1.10～1.20 | ≤0.35 | ≤0.50 | ≤0.030 | ≤0.030 | 0.20～0.50 | 2.00～2.50 | ≤0.20 |
Application of Tool Steel JIS SKS7
mainly used for cutting tools, impact resistant tools; part of the cold mold; all kinds of lawn cutter blades, gardening scissors.
Physical Properties of JIS SKS7 steel
| Properties | Metric |
| Density (hardened to 62 HRC) | 7.85 g/cm3 |
| Density (@399°C, hardened to 62 HRC) | 7.70 g/cm3 |
| Density (@191°C, hardened to 62 HRC) | 7.75 g/cm3 |
| Melting point | 1420°C |
Mechanical Properties
This is typical data, only for your reference.
| Properties | Metric | Properties | Metric |
| Hardness, soft annealed -delivery condition | 190HB | Compressive yield strength (0.2%, hardened to 50 HRC) | 1350 MPa |
| Hardness, tempering temp 300-1200°F | 34.0-64.0 HRc | Compressive yield strength (0.2%, hardened to 55 HRC) | 1800 MPa |
| Elastic modulus , hardened to 62 HRC | 193 GPa | Compressive yield strength (0.2%, hardened to 60 HRC) | 2150 MPa |
| Elastic modulus (@399°C/750°F, hardened to 62 HRC ) | 172 GPa | Compressive yield strength (0.2%, hardened to 62 HRC) | 2200 MPa |
| Elastic modulus (@191°C/375°F, hardened to 62 HRC) | 186 GPa |
Thermal Properties of JIS SKS7 tool steel
10.6 x 10-6/ºC, On 20-260 °C.
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JIS SKS7 Steel Forming of supply
the round bar, flat bar, plate and square block are supplyed. Round bar can be sawn to your required lengths as one offs or multiple cut pieces. Steel plate and sheet rectangular pieces can be sawn from flat bar ,sheet or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.
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- Round
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- sheet
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- Square
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- Plate
Heat treatment of JIS Tool Steel SKS7
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JIS SKS7 tool Steel Forged
Heat to 1038°C for forging but not forging below 816°C.
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Annealing for JIS steel SKS7
Slowly heat to 788°C, Keep enough time, ensure heat thoroughly. then cool in furnace slowly, A hour less than 4 °C Down.
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Tempering of SKS7 JIS tool steel
Tempering at 177-260°C, realize Rockwell C hardness 56-62 HRc.
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Martempering
hardening procedure for Martempering,
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Stress Relieving for SKS7 steel
The Tool steel stress relieving is necessary, when steel tool part is heavily machined, cutting,milled.
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Final Grinding of SKS7 steel
For get bright surface and precise dimension, If dry grinding, use a very soft wheel grinding is better.
Contact us for SKS7 tool steel
Contact our experienced sales team to help you with your SKS7 tool steel questions and inquiry by Email or Telphone. The questions and inquiry will be reply in 24 hours.
Email: jack@otaisteel.com
