24 July 2021 High Speed Steel Bar
M41 High Speed Steel Bar
M41 high speed steel is an American standard molybdenum series high speed tool steel. The main features are fine carbide particles, uniform distribution, good toughness, but decarburization sensitivity and overheating sensitivity, thermal processing and heat treatment range narrow.
The molybdenum high-speed steels are also referred to as Group M steels. In the United States, 95% or more of all manufactured high-speed steels are the Group M steels. The high-speed tool steel types have equal performance but the molybdenum high-speed steels have relatively lower initial cost. To enhance performance and tool service life, tools made of high-speed tool steel can be coated with titanium carbide, titanium nitride, and other coatings using the physical vapor deposition process.
Equvialent:
China GB standard grades W7Mo4Cr4V2Co5 ,
American AISI / ASTM standard M41,
United States UNS standard grade T11341,
International Organization for Standardization (ISO) standard grade HS2-9-1-8,
French NF standard grade HS7-4-2-5,
German DIN standard grade S74-2-5,
Germany DIN standard material number 1.3246,
British BS standard grade M41
Chemical composition:
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Mo(％) | V(%) | W(%) | Co(%) |
|---|---|---|---|---|---|---|---|---|---|
| 1.05-11.5 | 0.15-0.50 | 0.20-0.60 | ≤0.030 | ≤0.030 | 3.75-4.50 | 3.25-4.25 | 1.75-2.25 | 6.25-7.00 | 4.75-5.75 |
Mechanical properties:
| Yield Rp0.2 (MPa) | Tensile Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 439 (≥) | 931 (≥) | 41 | 41 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 221 |