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M2 High Speed Steel Round Bar
xxheise
AISI M2 high speed steel round bar conforms to ASTM A600 standard, equivalent to W6Mo5Cr4V2, SKH51 and DIN 1.3343. This molybdenum-tungsten high-speed tool steel possesses superior wear resistance, high hardness and excellent red hardness after quenching and triple tempering. Supplied in spheroidized annealed condition for convenient machining, it is widely used for manufacturing drills, end mills, taps, reamers and various high-wear tooling components. Full mill test certificate is provided for each shipment.
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- PRODUCT PARAMETERS -

Product Information Table


Item

Details

Product name

AISI M2 High Speed Steel Round Bar

Material

AISI M2, W6Mo5Cr4V2, SKH51, DIN 1.3343

Standard

ASTM A600, AISI M2

Type

Molybdenum-tungsten high-speed tool steel

Product form

Hot-rolled bar, forged bar, peeled bar, precision ground bar

Application

Drills, end mills, taps, reamers, saw blades, gear cutters, punches, high-wear mechanical parts

Explanation

M2 is general-purpose high-speed steel. Ground bar provides high dimensional accuracy. Delivered in annealed state for customer further processing and heat treatment.


Chemical Composition (wt.%)


Carbon C

Silicon Si

Manganese Mn

Chromium Cr

Molybdenum Mo

Tungsten W

Vanadium V

Phosphorus P

Sulfur S

0.80~0.90

0.20~0.45

0.15~0.40

3.75~4.50

4.50~5.50

5.50~6.75

1.75~2.20

≤0.030

≤0.030


Mechanical Properties


Condition

Diameter(mm)

Hardness

Explanation

Annealed (as-supplied)

≤200

≤255 HB

Spheroidized annealed, suitable for machining

Quenched & Tempered

≤100

62-66 HRC

Achieved after professional quenching plus triple tempering


Product Selling Points


M2 molybdenum-series high-speed steel round bar delivers excellent red hardness, maintains high hardness even under high-temperature cutting conditions for metal-cutting tool production.

Well-balanced combination of hardness, wear resistance and impact toughness, less prone to chipping during heavy-duty and intermittent cutting operations.

Good hardenability, uniform carbide distribution inside microstructure, stable performance after heat-treatment for drills, end mills, taps, saw blades and various high-speed cutting tools.

Good machinability under annealed delivery condition, support custom cut-to-length service, convenient for customers to process different tool blanks.

Strict raw-material and smelting control, ESR high-cleanliness grade optional, full mill test certificates available, widely used in tool-making, machinery processing and metal-cutting industry.


- FACTORY DISPLAY -

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We have our own independent factory which can provide one-stop service for steel cutting, forming and surface treatment. The factory has a strict quality inspection system and various precision testing instruments, and has passed all the third party quality tests such as SGS, BV and CE.

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【 OUR CERTIFICATIONS 】

- CUSTOMER VISITS -

We are listed as a high-quality supplier by many overseas customers andforeign trade companies.

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- PRODUCTION AND PROCESSING -

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- PACKING & DELIVERY -

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- FAQ -

Q1. What is AISI M2 high speed steel round bar M2 

Round bar is widely-used molybdenum-tungsten high-speed tool steel. It maintains high hardness under high cutting temperature, which is known as good red hardness, ideal for various cutting tool production.

Q2. What standards and equivalent grades for M2 steel 

Our M2 bars comply with ASTM A600 standard. Equivalent grades include GB W6Mo5Cr4V2, JIS SKH51 and DIN 1.3343. Each batch is attached with complete mill test certificate.

Q3. What sizes and bar forms are available 

Available diameter ranges from 6 mm to 200 mm. Options contain hot-rolled, forged, peeled and precision ground bars. Custom cut-to-length service is acceptable according to customer drawing.

Q4. What are the main application scenarios of M2 round bar

 It is mainly applied to make drills, end mills, taps, reamers, saw blades, gear cutters and broaches. It also works for punches and woodworking tools requiring high hardness and wear resistance.

Q5. What hardness can M2 reach after heat treatment 

The supply annealed hardness is ≤255 HB. After correct quenching and triple tempering process, M2 can reach 62-66 HRC with balanced wear resistance and red hardness for cutting service.


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