
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