BÖHLER high speed steels are used for machine tools such as drills, hobs and broaching tools and in some cold forming applications. The properties required here are wear resistance, hot hardness and toughness which prevents shelling of cutting edges. This guarantees high tool life, low maintenance and down times, and ensures a reproducible production process.Our high performance powder metallurgical high speed steels are a speciality. They are the mainstay in this demanding market segment.
BÖHLER high performance special steels: a cut above the rest.
HSS Equivalent Brand
| Austria | Japan | Sweden | China | |||
| Bohler | JIS G4403 | Daido | Hitachi | Nippon | Assab | Est |
| S600 | SKH51 | MH51 | YXM1 | H51 | VANADIS23 | DF6 |
| S705 | SKH55 | MH55 | YXM4 | HM35 | ASP60 | DF35 |
| S500 | SKH59 | - | YXM42 | HM42 | XW-41 | DF42 |
Chemical composition HSS S500, S600 & S705 ( % )
| Grade | C | Si | Mn | Cr | Mo | Ni | V | W | Co | Others |
| S600 | 0.90 | 0.45 max | 0.40 max | 4.10 | 5.00 | - | 1.80 | 6.20 | - | - |
| S705 | 0.92 | 0.40 | 0.30 | 4.10 | 5.00 | - | 1.90 | 6.20 | 4.80 | - |
| S500 | 1.10 | 0.50 | 0.25 | 3.90 | 9.20 | - | 1.00 | 1.40 | 7.80 | - |
Mechanical Properties
| Properties | S600 | S700 | S500 |
| Hardness after annealing (HBW) |
max 280 | max 280 | max 280 |
| Hardening Temperature (°C) | 1190-1230 | 1190-1230 | 1160-1180 |
| Obtainable hardness after tempering (HRC) |
64-66 | 64-66 | 67-69 |
| Quenchant | Oil, Air, Gas, Salt bath |
Oil, Air, Gas, Salt bath |
Oil, Air, Gas, Salt bath |
| Quenching Salt bath (°C) | 500 – 550 | 500 – 550 | 500 – 550 |
Application
Taps, twist drills, reamers, broaching tools, metal saws, milling tools of all types, woodworking tools, Cold work tools, Turning and planning tools of all types, milling cutters, etc
