ThePipingMart Blog Grades M41 Tool Steel (UNS T11341) – Composition, Properties and Uses

M41 Tool Steel (UNS T11341) – Composition, Properties and Uses

Tool Steel M41

Tool Steel M41 is a high-speed steel (HSS) alloy, ideal for making cutting tools that require a combination of hardness, wear resistance, and toughness. The alloy’s composition creates a durable material that can be used in various machining processes and applications. Let’s take a closer look at the composition, chemical properties, mechanical properties and uses of this versatile alloy.

M41 Tool Steel Composition

M41 Molybdenum High-Speed Tool Steel (UNS T11341) has an excellent balance of carbon and tungsten content. This combination allows it to be hardened to 67 HRC while maintaining its impact resistance. The alloy also contains chromium for improved hardenability and vanadium for increased abrasion resistance. Additional elements included are molybdenum and cobalt, which help improve hot-hardness levels.

Element Content (%)
Fe Balance
C 1.05-1.15
Mn 0.20-0.60
Si 0.15-0.50
Cr 3.75-4.50
Ni 0.3
Mo 3.25-4.25
W 6.25-7.00
V 1.75-2.25
Co 4.75-5.75
Cu 0.25
P 0.03
S 0.03

M41 Tool Steel Chemical Properties

The chemical components of Tool Steel M41 make it highly corrosion-resistant to acids and alkalies due to the additional chromium content. It is also oxid-resistant when exposed to elevated temperatures up to 1000°C (1832°F). The wear resistance of the alloy is enhanced by its low sulfur content, which helps prevent wear and tear during machining operations.

M41 Tool Steel Mechanical Properties

Alloy M41 has a high hardness level due to its composition and ability to retain it after being heat treated or quenched from extreme temperatures. Its tensile strength can reach up to 980 MPa with an elongation rate of 14%. The alloy’s high strength makes it an attractive choice for many applications, such as aerospace components, drill bits, taps, reamers, lathe tools, etc.

Mechanical properties Conditions
T (°C) Treatment
Poisson’s ratio 0.27-0.30 25
Elastic modulus 27557-30458 ksi 25

M41 Tool Steel Physical Properties

The physical properties of grade M41 include low thermal expansion rates and high electrical resistivity due to its high carbon content. This makes it an ideal choice for making parts that require precision measurements, such as electronic components or medical instruments.

Physical properties Conditions
T (°C) Treatment
Density 8.17 x 1000 kg/m3 25
Melting point 1425

M41 Tool Steel Thermal Properties

Thermal properties Conditions
T (°C) Treatment
Thermal expansion 9.7 x 10-6/ºC 20-200

M41 Tool Steel Equivalent

  • AFNOR 07-05-04-04-02
  • DIN 1.3246
  • ASTM A600
  • FED QQ-T-590
  • UNS T11341

M41 Tool Steel Uses

It is also widely used in engineering applications such as engine parts or automotive tools due to its superior strength and wear resistance capabilities.

Corrosion Resistance

In addition, the alloy’s excellent corrosion resistance makes it an attractive option for many applications in the oil and gas industry, where exposure to harsh chemicals is common.

Heat treatment

Its heat treatment process further enhances these features by providing higher levels of hardness while maintaining good ductility so that the finished product maintains its integrity throughout use, even under extreme conditions.


Its machinability is rated at 40% on average compared with other tool steels.


Its weldability remains very low because of its unique composition, which requires special techniques for welding without damaging the metal’s integrity.


In conclusion, Tool Steel M41 is one of the most versatile alloys available today due to its unique chemical makeup, which offers superior strength, wear resistance, corrosion resistance, heat treatment capabilities, machinability and weldability, among other desirable qualities. It’s ideal application range spans from large scale industries like aerospace engineering all the way down too small scale precision works like medical instruments or electronic devices, making it one of the most sought-after materials on today’s market. As you can see, Tool Steel M41 offers numerous advantages over other alloys allowing you get any job done right! Therefore if you’re looking for an effective material that can stand up against extreme conditions, then Tool Steel M41 should definitely be your top choice!

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