M7 High Speed Steel

grades of tool steel
M7 High Speed Steel

M7 high-speed steel is a high-performance tool steel known for its exceptional wear resistance, high hardness, and excellent toughness. It contains a significant amount of tungsten and molybdenum, providing superior heat resistance and maintaining hardness even at elevated temperatures. M7 steel is commonly used in the manufacturing of cutting tools such as drills, end mills, and reamers, particularly for high-speed and heavy-duty machining applications. Its balanced composition ensures good machinability while offering durability and long tool life, making it ideal for demanding industries such as automotive, aerospace, and precision machining.

C

0.97% – 1.05%

Si

0.20% – 0.45%

Mn

0.15% – 0.40%

S

≤0.030%

P

≤0.030%

Cr

3.50% – 4.00%

Mo

8.20% – 9.20%

V

1.75% – 2.25%

W

1.40% – 2.10%

Another dimension according to your requirements Surface condition:
— Black, annealed Rough Machined, Turned, or as per given requirements.
 
Mechanical properties:
-Hardness: The hardness of the annealing is 255HBW, and the cold stamping hardness is 269hbw. After quenching and recovery, the hardness can reach 62-63HRC.
-Tensile strength: ≥1170MPa.
-Symbol strength: ≥434MPa.
-Extension rate: about 32%.
-Section contraction rate: about 33%.
-Impact toughness: It has high impact toughness and can withstand the impact and vibration in the cutting process

Application

1.Cutting tools: suitable for manufacturing drills, milling cutters, turning tools, taps, saw blades, etc.
 
2.Mold manufacturing: suitable for manufacturing cold stamping dies, cold heading dies, fine stamping dies, powder pressing dies, deep drawing dies, punching dies, etc.
 
3.Mechanical parts: suitable for manufacturing mechanical parts that require high wear resistance or toughness.

Customer Testimonials

Outstanding Performance in Heavy-Duty Applications
“We’ve been using M7 high-speed steel for our precision cutting tools, and the results have been impressive. The material holds its hardness even in high-temperature environments, making it ideal for heavy-duty machining. We’ve seen a noticeable increase in tool life and productivity. Highly recommended for anyone in need of durable, high-performance cutting tools!”

Excellent Wear Resistance and Toughness
“M7 steel has exceeded our expectations in terms of wear resistance and toughness. We’ve been using it for drilling and milling applications, and it consistently performs well, even under demanding conditions. It provides an excellent balance of hardness and toughness, allowing us to tackle difficult materials without sacrificing tool integrity. Very satisfied with this steel grade.”

Reliable and Cost-Effective Solution
“We switched to M7 high-speed steel for our tool production and have noticed a significant improvement in both performance and cost-efficiency. The steel’s heat resistance and sharpness retention have made a real difference in reducing tool wear. M7 has proven to be a reliable solution for our manufacturing process, and we’ve seen reduced maintenance costs as a result.”

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FAQ

M7 high-speed steel is known for its excellent wear resistance, high hardness, and good toughness. It contains a high amount of tungsten, molybdenum, and chromium, making it highly resistant to heat and capable of maintaining hardness at elevated temperatures. These properties make M7 ideal for use in demanding cutting applications.

M7 high-speed steel offers a good balance between hardness, toughness, and wear resistance. While M2 and M4 are widely used in high-speed machining, M7 has a higher content of tungsten and molybdenum, which enhances its heat resistance and overall cutting performance in more extreme conditions. M7 is often chosen for heavy-duty cutting tools and applications requiring high performance at elevated temperatures.

M7 high-speed steel can achieve a hardness of approximately HRC 64-66 after heat treatment. This high hardness allows it to retain sharpness and resist wear even in challenging, high-speed cutting environments.

M7 high-speed steel is widely used in the production of cutting tools such as drills, taps, reamers, and milling cutters. It is especially suited for high-speed machining and applications requiring tools to endure high temperatures and tough materials, such as in automotive, aerospace, and metalworking industries.

The heat treatment of M7 high-speed steel involves a quenching process followed by tempering. First, the steel is heated to a temperature of approximately 1200-1250°C for quenching, and then it is tempered at around 550-600°C to achieve the desired hardness, toughness, and wear resistance. The tempering process is crucial to optimize the final properties of M7 steel for specific applications.