ThePipingMart Blog Grades M2 High Speed Steel (UNS T11302) – Composition, Properties and Uses

M2 High Speed Steel (UNS T11302) – Composition, Properties and Uses

Tool Steel M2

UNS T11302 is an extremely hard and tough high-speed steel offering superior wear and heat resistance. It has excellent hot hardness and can be used for various applications, from cutting tools to machine parts. This blog post will discuss the composition, chemical properties, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment, machining, and welding of Tool Steel M2.

M2 Tool Steel Composition

UNS T11302 is composed of 0.85% Carbon (C), 4.00% Chromium (Cr), 1.00% Vanadium (V), 5.50% Tungsten (W), 0.30% Cobalt (Co), 0.20% Molybdenum (Mo), 1.20% Manganese (Mn).

Element Content (%)
C 0.78-1.05
Mn 0.15-0.40
Si 0.20-0.45
Cr 0.20-0.45
Ni 0.3
Mo 4.50-5.50
W 5.50-6.75
V 1.75-2.20
Cu 0.25
P 0.03
S 0.03

M2 Tool Steel Chemical Properties

It has a high melting point and good toughness due to its low carbon content and chromium presence, which helps it resist oxidation at high temperatures while providing strength at lower temperatures.

M2 Tool Steel Mechanical Properties

The material has good tensile strength and toughness as well as good fatigue resistance due to its high carbon content, chromium presence and vanadium addition which increases the hardness of the material while still maintaining malleability so it can be machined into complex shapes without cracking or breaking apart too easily under stress or pressure.

Mechanical properties Metric Imperial
Hardness, Rockwell C (tempered at 1150°F, quenched at 2200°F) 62 62
Hardness, Rockwell C (as hardened, quenched at 2200°F) 65 65
Compressive yield strength (when tempered at 300°F) 3250 MPa 471000 psi
Izod impact unnotched (when tempered at 300°F) 67 J 49.4 ft-lb
Abrasion (loss in mm3, as-hardened; ASTM G65) 25.8 25.8
Abrasion (loss in mm3, tempered at 1275°F; ASTM G65) 77.7 77.7
Poisson’s ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30458 ksi

M2 Tool Steel Physical Properties

It has excellent wear resistance due to its tungsten content which provides extreme hardness with minimal distortion when heated or cooled quickly during machining processes such as drilling or grinding; it also has very good dimensional stability, which makes it ideal for creating precision parts that require exact measurements every time they are produced or replicated from one batch to another without any changes in shape or size over time or with repeated use in different conditions.

Physical properties Metric Imperial
Density 8.16 g/cm3 0.294 lb/in3
Melting point 4680°C 2600°F

M2 Tool Steel Thermal Properties

Thermal properties Metric Imperial
CTE, linear (@20.0 – 100°C/ 68.0 – 212°F) 10 μm/m°C 5.56 μin/in°F
CTE, linear (@20.0 – 500°C/68.0 – 932°F) 12.2 μm/m°C 6.78 μin/in°F
CTE, linear (@20.0 – 850°C/68.0 – 1560°F) 12.6 μm/m°C 7 μin/in°F

M2 Tool Steel Equivalents

  • AFNOR 06-05-04-02
  • DIN 1.3343
  • UNI KU
  • JIS SKH9
  • SS 2722
  • B.S. BM 2
  • FED QQ-T-590
  • ASTM A597 (CM-2)
  • ASTM A600
  • SAE J437
  • SAE J438
  • UNS T11302

M2 Tool Steel Uses

UNS T11302 is commonly used for making cutting tools such as drill bits and other machine tools that require extreme durability; it is also used in tooling applications where precise shapes need to be maintained over time without losing accuracy due to wear-and-tear over extended use periods on a daily basis in harsh industrial environments where corrosion may become an issue if not addressed correctly with proper materials selection upfront before production begins; finally, it is often used in automotive components such as brake pads since its high wear-resistance ensures these parts last longer than other materials when subjected to constant friction over prolonged periods of time such as during braking operations on highways and city streets alike where vehicles must slow down quickly but safely each time they come upon obstacles along their path of travel throughout their daily journeys across the country or around town respectively no matter what type of terrain they are traversing at any given moment whether paved roads with little traffic or unpaved roads with heavy offroading activities taking place simultaneously with regular car drive operations all happening simultaneously in close proximity to one another requiring everyone involved stay safe by using protective equipment made from materials that can withstand significant amounts of pressure without failing even after being exposed repeatedly every day over long periods of continuous use just like Tool Steel M2 does quite effectively every single time regardless how much strain gets put onto these products during normal everyday operations across multiple industries worldwide today more than ever before now that technology advances have made manufacturing faster more efficient better quality overall safer than ever prior history leading up present times right here right now this very moment today right now!

Corrosion Resistance

Tool steel M2 offers extraordinary corrosion resistance compared to other common steels, making it a superior choice for applications in a number of industries. In addition to its impressive strength, M2 is highly resistant to wear and abrasion, meaning even after years of continuous use, it will not lose its strength or shape. The alloying elements within the structure of M2 provide excellent protection from heat and oxidation, allowing tools and moulds made from this alloy to remain hard despite long-term exposure to harsh conditions. Because of its exemplary corrosion protection, machinists often recommend tool steel M2 over other steel components requiring superior temperature and corrosion stability. Ultimately, Tool Steel M2 showcases excellent wear resistance with superb levels of reliability and durability – making it the ideal option for various projects in various industries.

Heat Resistance

Tool steel M2 is becoming increasingly popular for its excellent heat resistance, making it a great choice for applications in fields such as aerospace engineering and industrial manufacturing. With one of the highest temperature tolerances among tool steels, M2 can stand up to extreme temperatures without softening or losing its strength. Additionally, it is far more corrosion-resistant than other options while still offering the toughness and abrasion resistance that is characteristic of its family. Its superior performance makes it an asset in any industry where strength and durability in the face of high temperatures are required.

Heat Treatment

Tool steel M2 is an extremely durable material and is popularly used in cutting tools, knives, and other applications requiring extreme strength. Heat treatment of M2 tool steel is a process that improves its performance by manipulating variables such as time and temperature. During heat treatment, the hardness of tool steel can be increased or decreased through annealing, hardening, quenching, tempering and normalizing. When handled correctly, M2 tool steel heat treatment can give exceptional performance benefits while significantly extending the tool steel’s life. Furthermore, it ensures optimal machinability so that it can be worked with less cost and effort. For high-quality results from your tool steel M2 heat treatment process, it is important to use a trusted provider for maximum efficiency when working with this valuable material.


Tool Steel M2 machining is a complex task, but it’s key to creating parts with the best performance, strength and durability. Machining requires specific techniques and the right cutting tools to ensure that the details are precise and accurate. With correct tool selection and experienced hands at the machine, Tool Steel M2 can be crafted with ease into components of superior quality. The hard part comes in ensuring that all surfaces of this tough steel have smooth finishes without compromising structural integrity. But when it comes down to getting the job done correctly and with great attention to detail, few other materials come close to matching Tool Steel M2 for machinability.


Tool steel M2 is one of the strongest and most durable materials for welding and other metalworking applications. It has excellent hot working properties, and its microstructures provide maximum wear resistance when properly heat treated. With proper maintenance, its chromium-molybdenum-vanadium alloy composition makes it an ideal choice for welding because it melts slowly to prevent high temperatures that can damage the integrity of the worksite. For these reasons, tool steel M2 is in high demand among welders who need a material that can withstand extreme pressure and stay guarded against corrosion.


Tool Steel M2 is an extremely hard yet malleable tool steel that offers superior wear resistance and heat resistance compared to other steels currently available on the market today. Its composition consists mainly of carbon combined with chromium-vanadium tungsten cobalt molybdenum manganese which gives it great strength while still allowing it to remain flexible enough for machining into complex shapes without breaking apart under stress pressure repeated use conditions typically found in industrial settings like automotive components and mining equipment construction labour etcetera so if you need something really tough really strong really reliable then definitely give tool steel m2 serious consideration next project requires supreme levels performance until then thanks reading happy coding!

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