ThePipingMart Blog Grades M34 Tool Steel (UNS T11334) – Composition, Properties and Uses

M34 Tool Steel (UNS T11334) – Composition, Properties and Uses

Tool Steel M34

UNS T11334 is an incredibly versatile steel commonly used in industrial and commercial applications. It has excellent wear resistance, tensile strength, and toughness, making it the perfect choice for a wide range of uses. This blog post will explore the composition, chemical properties, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment methods, machining techniques, and welding processes associated with Tool Steel M34.

M34 Tool Steel  Composition

This high-speed tool steel consists of tungsten (3.35%), vanadium (2.45%), molybdenum (5.25%), cobalt (1.10%) , chromium (4.50%), manganese (.70%), silicon (.25%) and carbon (.90%).  Its low carbon content makes it easier to machine than other tool steels but still offers superior abrasion resistance.

Element Content (%)
C 0.85-0.92
Mn 0.15-0.40
Si 0.20-0.45
Cr 3.50-4.00
Ni 0.3
Mo 7.75-9.20
W 1.40-2.10
V 1.90-2.30
Co 7.75-8.75
Cu 0.25
P 0.03
S 0.03

M34 Tool Steel  Chemical Properties

The chromium content in UNS T11334 provides good corrosion resistance while the vanadium and tungsten content increase its hardness and wear resistance properties. The cobalt content helps improve its red hardness, allowing it to retain its cutting ability at higher temperatures up to 800°C (1472°F).  The molybdenum content increases toughness and provides better hardenability while the manganese helps to improve strength and ductility at elevated temperatures up to 600°C (1112°F).

M34 Tool Steel  Mechanical Properties

This tool steel m34 has a very high hardness rating of HRC 22-28 and a high tensile strength of 900 – 1150 MPa with an elongation rate of up to 15%. It also has a very good fatigue strength rating of 700 – 1000 MPa with an impact energy value between 24 – 35 J/cm², making it ideal for applications that require both high hardness and flexibility such as milling cutters or taps.

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

M34 Tool Steel  Physical Properties

Due to its high wear resistance properties, this steel can be used in applications that require long wearing performance such as cold work tools or hot work tools like punches or dies. The melting point for this steel is 1128°C (2062°F) which makes it suitable for use in casting applications where high temperature stability is required. In addition, the specific gravity for this steel is 7.7 g/cm³ which is slightly higher than most other materials used for tooling applications due to its increased density from the presence of Cobalt and Vanadium elements in its composition.

Physical properties Conditions
T (°C) Treatment
Density 7.7-8.03 x 1000 kg/m3 25

M34 Tool Steel  Equivalent

  • DIN 1.3249
  • B.S. BM 34
  • ASTM A600
  • FED QQ-T-590
  • UNS T11334

M34 Tool Steel  Uses

This type of tool, steel m34, can be used in a wide range of applications, including milling cutters, drills or taps, cold work tools, or hot work tools like punches or dies due to its excellent wear resistance properties at elevated temperatures up to 800°C (1472°F). It can also be used in casting applications due to its high melting point, making it suitable for use in furnaces where temperatures exceed 1130 °C (2066 °F). Additionally it can be used as components on machines such as cams or gears that need reliable performance under extreme conditions where abrasion may be present over extended periods of time without significant loss in performance characteristics like dimensional accuracy or surface finish quality.

Corrosion Resistance

UNS T11334 is a unique alloy that offers superior performance in corrosive environments. Its composition and heat treatment provide excellent resistance to corrosion, making it an ideal choice for applications where contact with water and other liquids is likely. Its wide range of hardness and toughness also gives it the strength to stand up to demanding situations found in industrial equipment, tools and parts. With this combination of properties, tool steel M34 is a great option for components that need high-performing corrosion resistance in any environment.

Heat Resistance

Tool steel M34 can withstand extremely high temperatures, making it one of the most highly sought after materials in industries such as aerospace and automotive. Its heat-resistance properties have enabled its use in the creation of precise parts and tools for machines that must be able to survive high temperature work environments. The unique combination of nickel and chromium enables tool steel M34 to maintain its strength even with extreme amounts of pressure and heat, creating durable solutions when conventional materials won’t do. It is easy to see why this material has become valuable in so many applications, providing greater safety and reliability.

Heat Treatment

Tool Steel M34 undergoes a unique heat treatment process that produces extraordinary hardness and durability. In this process, the material is heated up to 1200 degrees Celsius and held for an hour, before being cooled down rapidly in oil or gas. This rapid cooling locks the martensitic microstructure into place, giving the steel its extremely high hardness level with excellent wear resistance. The result of this process is a material that can handle highly severe applications where other materials may fail due to enormous mechanical stress or friction. Thereby ensuring a reliable performance for many years to come.


Machining UNS T11334 can be a complex task that requires precision and a highly skilled machinist. This type of steel is characterized by its superior ductility, malleability, and wear resistance due to the high concentration of carbon and chromium, making it challenging to work with. Even so, when done correctly, machining M34 accurately will yield great results for various mechanical projects such as automotive components and medical device fixtures. When choosing a cutting tool for your project, it is important to consider the speed at which you are machining to ensure optimal performance. Additionally, choosing the right coolant can increase tool life and optimize finishes on parts made from this alloy. All in all, take into account all necessary factors prior to machining M34 in order to ensure a successful outcome.


UNS T11334 welding is a complex process, requiring skilled welders and careful preparation. Before beginning the welding process, the area must be properly prepped and inspected for possible contamination. During the welding process itself, welders must exercise proper heat control while ensuring that they keep body positioning correct relative to their work to effectively prevent warping or melting of the material. Finally, once completed, it’s necessary to properly cool off the welded area by active cooling if necessary in order to ensure no cracking occurs due to residual stress or thermal fatigue. With the right dedication and attention to detail, tool steel M34 welding can produce strong and durable results.


As you can see, Tool Steel M34 offers a wide range of benefits when compared against other steels due to its unique composition consisting primarily of tungsten, vanadium and molybdenum with small amounts cobalt, chromium and manganese included along with .90% carbon content giving it excellent wear resistance properties when exposed extreme conditions such as those found in hot work or cold work tooling applications along with providing good machinability characteristics when compared against other grades making it highly sought after by many industries looking for dependable performance at elevated temperatures over extended periods without sacrificing dimensional accuracy or surface finish quality when machined into finished components like milling cutters drills taps cams gears etc.. With so many advantages offered by using the right grade tool steelM34it’s no wonder why so many businesses have come rely on it when they need reliable performance even under the most challenging circumstances!

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