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JIS SKS3 steel
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| C(％) | 0.90～1.00 | Si(％) | ≤0.35 | Mn(％) | 0.90～1.20 | P(％) | ≤0.030 |
| S(％) | ≤0.030 | Cr(％) | 0.50～1.00 | V (％) | — | W(％) | 0.50～1.00 |
SKS3 steel Heat treatment Related
- Annealing of SKS3 Tool steel
Slowly heated to 740-760 ℃（1364-1400℃） and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The SKS3 tool steel will get MAX 250 HB （Brinell hardness）.
- Hardening of SKS3 tool steel
SKS3 steels should be heated uniformly to 780-820°C (1436-1508°F) until completely heated through. If needed, the steels can be preheated at 300-500°C (572-932°F). About 30 min/per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in oil.
- Tempering of SKS3 tool steel
Tempering of SKS3 steels is performed at 100-350°C (212-662°F), Soak well at the selected temperature and soak for at least one hour per 25mm of total thickness. Get Rockwell C hardness of 55 to 64.
Temperature [℃] 100 150 200 250 300 350
Hardness [HRc] 64-63 63-62 62-61 60-59 58-57 56-55
Mechanical Properties
The mechanical properties of SKS3 tool steels are outlined in the following table.
| Elastic modulus (@399°C/750°F, hardened to 62 HRC ) |
Elastic modulus (hardened to 62 HRC) | Yield (0.2%, hardened to 55 HRC) |
Yield (0.2%, hardened to 60 HRC) |
Yield (0.2%, hardened to 62 HRC) |
Yield (0.2%,hardened to 50 HRC) |
| GPa | GPa | Mpa | Mpa | Mpa | MPa |
| 172 | 193 | 1800 | 2150 | 2200 | 1350 |
SKS3 steel Applications
SKS3 steels are mainly used for short run tooling for cold forming dies, blanking dies, and cutting tools operating at ambient temper.
SKS3 tool steel typical applications include medium run dies, intricate press tools, drawing punches, broaches, bushings, lathe centres, chuck jaws, master cavity sinking hobs, paper cutting machine knives, plug gauges, thread gauges and precision measuring tools. Also commonly used in applications such as cams, cloth cutting knives, cold taps, reamers, collets, cutting hobs, strip slitting cutters, trimmer dies, tube expander rolls, plastic moulds and woodworking knives ature.
Regular size and Tolerance
| 1) Hot Rolled round bar | |||
| Diameter (mm) |
Diameter Tolerance (mm) |
Diameter (mm) |
Diameter Tolerance (mm) |
| ≤12.70 | -0.13 ～0.30 | >50.80～63.5 | -0.25～0.76 |
| 12.7～25.40 | -0.13～0.41 | >63.50～76.20 | -0.25～1.02 |
| >25.4～38.10 | -0.15～0.51 | >76.20～101.60 | -0.30～+1.27 |
| >38.1～50.80 | -0.20～0.64 | >101.60～203.20 | -0.38～3.81 |
| 2) Hot Rolled steel plate | |||
| Thickness (mm) |
Thickness Tolerance (mm) |
Thickness (mm) |
Thickness Tolerance (mm) |
| ≤25.4 | -0.41～0.79 | >127～152 | -1.60～2.39 |
| >25.4～76 | -0.79～1.19 | >178～254 | -1.98～3.18 |
| >76～127 | -1.19～1.60 | >254～305 | -2.39～3.96 |
Others SKS3 have not specified size, pls contact our experienced sales team.
JIS SKS3 tool steel round bar and flat sections can be cut to your required sizes. SKS3 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. JIS SKS3 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.
Contact our experienced sales team to help you with your SKS3 tool steel questionsadn enquiry by Email or Telphone. The questions will be reply in 24 hours.
OTAI SPECIAL STEEL CO., LTD
Email: jack@otaisteel.com TEL: 0086-769-33232622 FAX: 0086-769-88705839
Persona a contactar : kamen chan, +8676923190193
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