Introduction
M35 tool steel is a medium-alloyed high speed tool steel, similar to M2, but with 5% cobalt added, providing better hot hardness and wear resistance. M35 Steel high speed tool steel is suitable for heat treatment up to 66 HRC, and also offers excellent cutting performance and offers excellent cutting performance.
Steel Properties : This kind of steel is suitable for conditions involving thermal stresses and discontinuous cutting. Heavy-duty miling cutters of all kinds, gear cutter, highly stressed twist drills and taps, profile knives, machining of high-strength material, broaches.
Applications : It is one of the W-Mo Co HSS grades with good cutting character. The red hardness, hot hardness and wearing resistance are all better than W6M05Cr4V2.
Chemical Composition : (%)
| C | Si | Mn | Cr |
| 0.88-0.96 | 0.20-0.45 | 0.20-0.40 | 3.80-4.50 |
| Mo | Co | V | P | S |
| 4.70-5.20 | 4.55-5.50 | 1.70-2.00 | <0.030 | <0.030 |
Grades Equivalent :
| STANDARD | BRAZIL | AUSTRIA | SLOVANIA |
| 1.3243 | VK5E | S705 | BRCMO |
| JIS | CZECH REP. | CHINA | AMERICAN |
| SKH55 | MAX SP 75D | W6Mo5CrV2Co5 | M-35 |
New Development M35A Application:
Suitable for fabricating various abrasion-resistant and impact-resistant tools for powerful cutting, high-level trimming dies, screw dies, tools of complicated shapes requiring tenacity, reamers, milling cutters, punches, etc.
Mainly used as roller cutters, drawing tools, end mills, etc.
Production Process :
| Under Annealed Condition : | Reduction Ratio : | Delivery Status : |
| Hardness : HB205-255 | As 1:4 or 1:5 | As Cold drawn / Hot rolled / forged, in annealed condition |
Sizes of Round Bars :
| Cold Drawn/Ground Bar | Hot Rolled Annealed Peeled Bar | Forged Anealed Turned Bar | Coil |
| Φ 2.0 - 14.4mm | Φ 14.5 - 80.0mm | Φ 81.0 - 300.0mm | Φ 2.0 - 13.5mm |
Sizes of Flat Bars :
| Thickness | Width |
| 5mm - 150mm | 5mm - 810mm |
Sizes of Square Bars :
| 4mm - 100mm |
Sizes of Sheets :
| Thickness | Width | Length |
| 0.5mm - 12mm | 810mm | 2500mm |
Heat Treatments :
Annealing :
- Annealing temperature : 860-880℃, keep this temperature by for 2-4 hours, then cool to 600℃ at a speed of less than 30℃/h.
- If after a cold drawn process, suggest a stress relieving annealing process. Under the temperature of 600-700℃, keep this temperature for 2 hours.
- Quenching & Tempering (salt bath).
Quenching :
- Pre-heating in two steps :
- Heating temperature under: 400-500℃ and 850-900℃
- Austenitizing temperature: 1180-1220℃
- H Heating coefficient 10-15 sec/mm, quenching under 580-620℃, then cooling to room temperature.
Tempering :
- Tempering temperature under:540-560℃, tempering 3 times, each time 1 hour, then cooling to room temperature.
