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M41 high speed steel American standard steel molybdenum 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.
Features
This alloy is a High Speed, tungsten, molybdenum containing tool steel. It has good toughness along with hardness and is lower in cost than an equivalent tungsten (W) tool steel.
Applications
Primary application is as cutting tools for machining operations.
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 |
Tensile |
Impact |
Elongation |
Reduction in cross section on fracture |
As-Heat-Treated Condition |
Brinell hardness (HBW) |
|
439 (≥) |
931 (≥) |
41 |
41 |
13 |
Solution and Aging, Annealing, Ausaging, Q+T,etc |
221 |
Preheat at 1450 F and then rapidly heat to 2250 F. Hold parts for 2 to 5 minutes and air cool, salt bath or oil quench.
Anneal at 1600 – 1650 F and slow cool in the furnace at less than 40 F per hour.
