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M42 High Speed Steel M42 HSS M42 Round M42 Bars M42 High Speed Steel M42 HSS M42 Round M42 Bars M42 High Speed Steel M42 HSS M42 Round M42 Bars M42 High Speed Steel M42 HSS M42 Round M42 Bars M42 High Speed Steel M42 HSS M42 Round M42 Bars

M42 High Speed Steel M42 HSS M42 Round M42 Bars

1981.0 INR/Kilograms
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Product Details:

  • Application Tool manufacturing, cutting tools, high-performance saw blades, industrial knives, and dies
  • Diameter 3 mm to 300 mm
  • Finish Bright, Black, Polished
  • Technique Hot Rolled, Cold Drawn
  • Type Round Bars
  • Length 2 - 6 meters (custom sizes available)
  • Grade M42
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M42 High Speed Steel M42 HSS M42 Round M42 Bars Price And Quantity

  • 1981.0 INR/Kilograms
  • 1 Kilograms

M42 High Speed Steel M42 HSS M42 Round M42 Bars Product Specifications

  • M42 High Speed Steel (HSS)
  • M42
  • 2 - 6 meters (custom sizes available)
  • h9, h11 or as per customer requirement
  • ASTM, AISI, DIN, JIS
  • High speed cutting and machining applications
  • Annealed, Hardened, Tempered
  • Round Bars
  • Bright, Black, Polished
  • Hot Rolled, Cold Drawn
  • 3 mm to 300 mm
  • Tool manufacturing, cutting tools, high-performance saw blades, industrial knives, and dies
  • Excellent
  • Good in dry environments
  • 8.1 g/cm3
  • Peeled, Turned, Ground
  • 65-67 HRC after heat treatment
  • C 1.09%, Cr 3.75-4.50%, Mo 9.0-10.0%, V 0.95-1.35%, W 1.40-1.75%, Co 7.75-8.50%, Si 0.60%, Mn 0.40%
  • Annealed or as rolled
  • 100% Ultrasonically tested

Product Description

M42 High Speed Steel (AISI M42 / WNr 1.3247 / HS2-9-1-8) round bars, rods, and bar stock.

Chemical Composition

Element Min Range Max Range
Carbon (C) 1.05 1.15
Cobalt (Co) 7.75 8.75
Molybdenum (Mo) 9.00 10.00
Chromium (Cr) 3.50 4.25
Tungsten (W) 1.15 1.85
Vanadium (V) 0.95 1.35
Silicon (Si) 0.20 0.45
Manganese (Mn) 0.15 0.40
Phosphorus (P) - 0.030
Sulfur (S) - 0.030

Rod & Round Bar Supply Specifications

Parameter Standard Range / Condition
Diameter Range (Hot Rolled) 10 mm to 120 mm
Diameter Range (Forged) 80 mm to 350 mm
Diameter Range (Cold Drawn / Ground Rods) 2 mm to 30 mm
Standard Lengths 2000 mm to 6000 mm or custom cut-to-length
Surface Finish Conditions Black Surface, Turned, Peeled, Centerless Ground, Bright Polished
Dimensional Tolerances ISO h8, h9, h11, DIN 175
Delivery Hardness (Annealed) Max 269 HB / 28 HRC

Physical & Mechanical Properties

Property Value Unit
Density 7.81 g/cm
Modulus of Elasticity 220 GPa
Thermal Conductivity (20C) 20.0 W/mK
Thermal Expansion Coefficient (20-100C) 11.0 x 10 /K
Achievable Hardened Hardness 67 - 70 HRC
Yield Strength (Hardened & Tempered) 2500 MPa

Heat Treatment Processing

Process Temperature Range (C) Cooling Medium / Strategy
Soft Annealing 840 - 870 Slow furnace cool (10C per hour to 600C, then air cool)
Stress Relieving 650 - 700 Slow furnace cool
Preheating 820 - 850 Equalize thoroughly before hardening
Hardening (Austenitizing) 1170 - 1200 Oil, Salt Bath (550C), or Vacuum / Gas Quench
Tempering 520 - 550 Minimum 3 cycles (1 to 2 hours per cycle), air cool to room temp

International Standard Equivalents

Country / Standard System Standard Designation Material Number / Grade
USA (AISI / ASTM) AISI M42 / ASTM A600 T11342
Germany (DIN / WNr) DIN 17350 1.3247 / S 2-10-1-8
European Union (EN ISO) EN ISO 4957 HS2-9-1-8
Japan (JIS) JIS G4403 SKH59
China (GB) GB/T 9943 W2Mo9Cr4VCo8
Russia (GOST) GOST 19265 R2M9K8
France (AFNOR) NF A35-590 Z110WKCV09-08-04-02-01

Key Applications for M42 Round Bars & Rods

  • High-Speed Heavy Machining: End mills, twist drills, taps, broaches, gear hobs, and reamers for hard-to-machine superalloys.

  • Aerospace & Defense: Machining nickel-based alloys (Inconel), titanium alloys, stainless steels, and heat-treated high-strength steels.

  • Industrial Saw Blades: Bimetal bandsaw blades, circular saw blades, and cold saws operating at high cutting speeds.

  • Cold Work Tooling: High-wear punches, forming dies, and thread rolling dies requiring extreme hot hardness.



Exceptional Hardness and Durability

M42 High Speed Steel bars achieve a hardness of 65-67 HRC after proper heat treatment, ensuring excellent performance in high-speed cutting and machining applications. Their robust chemical composition, including cobalt, enhances wear resistance and tool life. This makes M42 ideal for manufacturing tools that require prolonged durability under intense working conditions.


Versatile Surface and Processing Options

The M42 HSS bars are supplied in various surface conditions such as peeled, turned, or ground. Finishes include bright, black, and polished, catering to different user requirements. They can be delivered annealed, hardened, or tempered, allowing customers to choose the most suitable processing state for their specific machining or tooling needs.


Wide Range of Applications Across Industries

Due to their hardness, machinability, and good corrosion resistance in dry environments, M42 round bars are widely used in tool manufacturing, high-performance saw blades, cutting tools, industrial knives, and dies. Their versatility and conformity to international standards (ASTM, AISI, DIN, JIS) support their use by manufacturers, suppliers, and fabricators globally.

FAQ's of M42 High Speed Steel M42 HSS M42 Round M42 Bars:


Q: How is the hardness of M42 High Speed Steel bars achieved?

A: The impressive hardness of 65-67 HRC is attained through precise heat treatment processes, which enhance the steel's wear resistance and durability for high-speed cutting and machining applications.

Q: What are the main benefits of using M42 HSS round bars in tooling?

A: M42 HSS round bars provide exceptional wear resistance, excellent machinability, and prolonged tool life due to their robust chemical composition with high cobalt content, making them highly effective for manufacturing industrial tools and high-performance saw blades.

Q: When should I choose annealed or as-rolled delivery conditions for M42 bars?

A: Annealed M42 bars are ideal if further machining and shaping are required before final heat treatment. As-rolled bars suit applications where minimal additional processing is needed, depending on specific project requirements.

Q: Where can M42 round bars be utilized in industry?

A: These bars are commonly used in sectors requiring high speed cutting tools, such as tool manufacturing, industrial knives, saw blade production, and die fabrication, due to their hardness and reliability.

Q: How is the quality of M42 HSS round bars assured?

A: Every bar undergoes 100% ultrasonic testing (UT Test) to detect internal flaws, ensuring structural integrity and consistently high quality in delivery.

Q: What processing techniques are available for M42 round bars?

A: The bars can be hot-rolled, cold-drawn, peeled, turned, or ground, and are available in different finishes (bright, black, polished) to meet varied machining or aesthetic needs.

Q: What are the available size and tolerance options for M42 bars?

A: M42 round bars can be ordered in diameters from 3 mm up to 300 mm, and lengths between 2 and 6 meters. Tolerance levels such as h9 or h11, or custom specifications, are also supported to match your precise requirements.

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