Product Description
Factory Supply M7 / SKH58 / 1.3348 High-Speed Tool Steel Flat Bar
M7 (high-performance high-speed steel alloy for high-speed machining tool steel material) is an improvement of M2 and is recommended for use in high-speed applications. M7 is also recognized for its well-balanced blend of hardness, wear and high-temperature resistance, making it perfect for guides and dies used in high-pressure environments and in cutting tools, drills and industrial knives.
We have advanced M7 high-speed steel that works superbly at extreme heat and stress; it offers better resistance to thermal fatigue and wear. It is commonly used in industries that demand precision and durability, such as aerospace, automotive, and tooling industries.
Similar Grade
| Execution Standard |
ZEICIN Grade |
GB |
AISI |
JIS |
DIN |
| ASTM A600-1992(R2010) |
M7 |
W2Mo9Cr4V2 |
M7 |
SKH58 |
1.3348 / HS2-9-2 |
Main Chemical Composition%
| C |
W |
Mo |
Cr |
V |
Co |
Al |
Mn |
Si |
S |
P |
| 0.97-1.05 |
1.40-2.10 |
8.20-9.20 |
3.50-4.00 |
1.75-2.25 |
- |
- |
0.15-0.40 |
0.20-0.55 |
≤0.03 |
≤0.03 |
Product Parameters
M7 High-Speed Steel Heat Treatment Process
The best combination of hardness, toughness, and wear resistance conditions in T4 HSS is achieved by a multi-part heat treatment process. The heat treatment process includes:
-
Soft Annealing:
After heating the steel to 820-880°C, the steel is gradually cooled in the furnace. This process gives the steel the needed softness, making it easier to machine. After annealing, the steel reaches a Brinell hardness of 230-280 HB.
-
Hardening:
It is preheated between 450-600°C and heated to 850°C, then at 1050°C the steel is heated for hardening to a temperature range of 1180-1220 °C, then quenched in oil, air, or in warm water at 550°C when tempering to reach a hardness of 64-66 HRC.
-
Tempering:
The steel tempering is performed 3 times at 540-560°C for an hour each. The hardness remains above 64 HRC after tempering.
-
Forging:
Hot Working Hot forming temperatures that are typically used for steel parts should be between 1100-900°C.
Performance After Application of Heat:
1)Well Hardened: M7 steel can be hardened and tempered to a high Rockwell hardness of 64~66 HRC which allows for great wear resistance.
2)Enhanced Toughness: After tempering, the steel maintains its good toughness and crack resistance despite high hardness.
3)Good Machinability: In the soft annealed condition, M7 is easy to machine prior to any final heat treatments.
Our Advantages
Benefits of Using Our M7 High Speed Steel
Exceptional Value for Money
1. Equal Quality, cheaper Pricing:
In addition, our M7 high-speed steel keeps the same premium performance level as top brands of the world, with a much competitive price. Employing advanced smelting techniques and stringent quality control, this is a fantastic balance of high performance & affordability- a cost-effective necessity for your application.
Cutting-edge manufacturing machinery
1. Innovative Smelting Process:
M7 steel is produced using an advanced EAF + LF + VD + RS ESR process, and the carbides are uniformly distributed, and the microstructure is uniform. This construction provides improved toughness, high wear resistance, and durability, making it well-suited for high-stress and high-temperature applications.
2. Precision Heat Treatment:
Nevertheless, in addition to M7 steel, the unique heat treatment processes not only increase the hardness and toughness of the material but also greatly improve the performance of M7 steel with respect to extreme applications. It undergoes an advanced heat treatment, which gives it excellent mechanical properties, specifically impact and wear resistance.
Reliable Product Quality
1. Consistent integrity of Material:
We manage the whole physical manufacturing process, from the raw material sourcing stage to the final manufacturing stage. This all-inclusive method ensures that quality and performance remain consistent from batch to batch.
2. International standard compliant:
M7 high-speed steel conforms to domestic and international quality standards: ASTM 600, AISI M7, JISSKH58, and DIN 1.3348. This ensures that our goods meet the greatest universal requirements and comfort our clients.
Technical Expertise and Innovation
1 .Research and development are ongoing:
Thanks to the support of the National Ministry of Science and Technology "13th Five-Year Plan", our company is now capable of continual innovation and technical development. This enables us to remain at the cutting edge of steel technology and provide our customers with the most up-to-date, high-performance materials.
2. Unique Technology:
Developed a proprietary Rapid solidification Electro-Slag Remelting (Rs EsR) process together with Shanghai University, China, and Beijing Iron & Steel Research Institute, China. This makes M7 steel with high purity and better distribution of carbide, which improves the overall performance.
3. Advanced Spray Forming Process:
Working with Baosteel Group as our unique partner, we have developed a spray forming process for M7 high-speed steel. This proprietary process, which is exclusive to our factory in China, improves the mechanical properties of steel and makes it suitable for unique, specialist, high-performance applications.
Applications
M7: Very high wear resistance, high toughness, and excellent edge stability. It is widely used in industrial applications:
-
Cutting Tools: Low-cost and high-precision for gear cutting tools, drills, milling cutters, taps & dies with long tool life.
-
Thread cutting and forming: Used for thread cutting drills and cold forming tools for durability and edge toughness.
-
Heavy Construction Drills: Perfect for heavy-duty drills requiring extended life and high flexibility.
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Punch and Die: Good punching tools and dies, wear resistance, high strength, and high impact.
-
The Properties of the welding tool: Tool repair - repair of punch faces with preheated molding tools with high wear resistance.
Packaging & Shipping
FAQ
1. Is M7 high-speed steel available from you as raw material or as a semi-finished product?
Our M7 high-speed steel raw materials are as per your requirement, and also cut and shape into desired shapes such as high-speed steel drills, taps, punches, thread cutting tools, and milling cutters as per your specifications.
2. M7 high-speed steel average delivery time?
Delivery timescale will depend on your order size and complexity. Raw material orders are usually executed and shipped in 30-40 days. Delivery time for tailored tools and semi-finished products will be defined according to individual processing needs.
3. Do you do heat treatment on M7 steel?
We do heat treat the M7 steel so that it meets the required hardness, toughness, and wear resistance specifications. We offer heat treatments: hardening, tempering, soft annealing, etc.
4. Which types of M7 steel do you provide?
M7 steel is available in various forms like round bar, sheets, flat bars, and customized shapes. Depending on your particular needs, we may also be able to finish gearing up with the metal or semi-finished parts.
5. Please quote me M7 high-speed steel.
For any quotation about M7 steel or other products, please contact our sales team by email, phone, or online form. We will get back to you quickly with a quote that includes pricing and estimated lead time based on your needs.
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