OTAI SPECIAL STEEL is STS3 steel stockholders and suppliers from china. more 16 years experience in JIS STS3 tool steel round bar, flat bar and plate supply.
JIS STS3 Steel is a high quality Cold work tool steel, It belong to the high quality high carbon alloy tool steel. Oil Quenched & Tempered Hardenss is 28-34 HRc. JIS STS3 steel Annealing delivery hardenss less than 250HB.
Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4404 GB/T 3077 STS3 STEEL DATA PDF DOWN
Form of Supply
JIS STS3 tool steel, we can supply the round bar, steel flat bar, plate, hexagonal steel bar and steel square block. JIS STS3 steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. STS3 steel Rectangular pieces can be sawn from flat bar 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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- Plate
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- Square
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- sheet
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- Hexagonal
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- Pipe
Chemical composition
| 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 |
Material equivalent of KS STS3 Alloy cold work steel
| USA | Germany | China | Japan | France | England | Italy | Poland | Czechia | Austria | Sweden | Spain |
| ASTM, AISI, SAE | DIN,WNr | GB | JIS | AFNOR | BS | UNI | PN | CSN | ONORM | SS | UNE |
| O1 | 100MnCrW4 | 1.2510 | 9CrWMn | SKS3 | 90MnWCrV5 | BO1 | 2140 | |||||
STS3 steel Heat treatment Related
- Annealing of STS3 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 STS3 tool steel will get MAX 250 HB （Brinell hardness）.
- Hardening of STS3 tool steel
STS3 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 STS3 tool steel
Tempering of STS3 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 STS3 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 |
Applications
STS3 steels are mainly used for short run tooling for cold forming dies, blanking dies, and cutting tools operating at ambient temper.
STS3 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 wood working knives.
Regular size and Tolerance
SKS3 steel round bar: Ø5mm to 1300mm
SKS Steel plate/ flat bar: Thickness 2mm-810mm x width 50-1250mm
Others STS3 have not specified size, pls contact our experienced sales team.
Processing
JIS STS3 tool steel round bar and flat sections can be cut to your required sizes. STS3 tool steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. JIS STS3 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 STS3 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
