High Speed Steel M2 Bars

Starc Metals, located in Canberra, Australia, stands out as a top-notch manufacturer and supplier of premium metals, with a particular focus on High Speed Steel (HSS) M2 Bars. Known for their precision and dependability, Starc Metals provides products that adhere to strict industrial standards, guaranteeing outstanding performance across a variety of applications. Their HSS M2 Bars are produced using cutting-edge metallurgical techniques, blending durability with impressive hardness and wear resistance. With a strong dedication to quality and customer satisfaction, Starc Metals serves a wide range of industries, from manufacturing and automotive to aerospace, offering customized solutions that boost productivity, efficiency, and tool longevity throughout Australia and beyond.

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M2 Alloy High Speed Steel Bar

High Speed Steel M2 Round Rod

HSS M2 Bars

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What is High Speed Steel M2 Bars ?

High Speed Steel M2 Bars are made up of 0.85–0.90% carbon, 4.0–4.5% chromium, 5.0–6.0% molybdenum, 6.0–6.5% tungsten, and 0.20–0.50% vanadium. This careful alloying process gives the steel remarkable hardness, wear resistance, and red hardness, allowing it to maintain cutting efficiency even at elevated temperatures. M2 Bars are known for their exceptional toughness, compressive strength, and dimensional stability, making them perfect for heavy-duty machining tasks. When heat-treated, M2 HSS can reach hardness levels of up to 64 HRC, ensuring a long tool life and reliable performance in precision cutting, drilling, and shaping operations across various industrial settings.

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High Speed Steel M2 Bars Specifications

  • Standard : ASTM A600, ASME SA600
  • Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
  • Form : Round
  • Diameter : 2mm to 100mm depending on grades
  • Length : 100 mm to 10,000 mm
  • Surface Condition : Black, Grinded, Turned Bright, Machined Proof
  • Application : Lathe Tools, Milling Cutter, Cutter Blades, Boring Tools, Twist drills, Milling Knives, Reamers, Taps, Metalcutting saws, Screw Cutting Tools, File Cutter’s Chissels, Drills, Hobs, Drill Bits, Tread cutting tools etc

Chemical Compositions of High Speed Steel M2 Bars

ASTM A600 C Mn P S Si Cr V Mo W
M2 regular C 0.78 0.88 0.15 0.40 0.03 0.03 0.20 0.45 3.75 4.50 1.75 2.20 4.50 5.50 5.50 6.75
DIN ISO 4957 C Mn P S Si Cr V Mo W
1.3343 0.86 0.94 … … … … … 0.45 3.80 4.50 1.70 2.10 4.70 5.20 5.90 6.70
JIS G4403 C Mn P S Si Cr V Mo W
SKH51 0.80 0.88 … 0.40 0.03 0.03 … 0.45 3.80 4.50 1.70 2.10 4.70 5.20 5.90 6.70

Mechanical Properties of High Speed Steel M2 Bars

Mechanical properties Metric Imperial
Hardness, Rockwell C (tempered at 1150°F, quenched at 2200°F) 62 62
Hardness, Rockwell C (as hardened, quenched at 2200°F) 65 65
Compressive yield strength (when tempered at 300°F) 3250 MPa 471000 psi
Izod impact unnotched (when tempered at 300°F) 67 J 49.4 ft-lb
Abrasion (loss in mm3, as-hardened; ASTM G65) 25.8 25.8
Abrasion (loss in mm3, tempered at 1275°F; ASTM G65) 77.7 77.7
Poisson’s ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30458 ksi

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Why Starc Metals?

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Equivalent Grades of High Speed Steel M2 Bars

Country USA German Japan
Standard ASTM A600 DIN EN ISO 4957 JIS G4403
Grades M2 1.3343 SKH51

Thermal Properties of High Speed Steel M2 Bars

Thermal properties Metric Imperial
CTE, linear (@20.0 – 100°C/ 68.0 – 212°F) 10 μm/m°C 5.56 μin/in°F
CTE, linear (@20.0 – 500°C/68.0 – 932°F) 12.2 μm/m°C 6.78 μin/in°F
CTE, linear (@20.0 – 850°C/68.0 – 1560°F) 12.6 μm/m°C 7 μin/in°F

Physical Properties Of High Speed Steel M2 Bars

DENSITY (G/CM 3) 8.08
DENSITY (LB/IN 3) 0.292
MELTING POINT (°C) 1425
MELTING POINT (°F) 2600

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High Speed Steel M2 Bars Types

M2 High Speed Steel Square Bars
High Speed Steel M2 Bright Round Bar
M2 Alloy High Speed Steel Flat Bars
High Speed Steel M2 Threaded Bar
M2 High Speed Steel Hexagon Bars
HSS M2 Round Bars And Rods

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Frequently Asked Questions (FAQ)

Yes, High-Speed Steel M2 can be welded, but it requires careful heat control. Preheating, welding with proper filler material, and post-weld heat treatment are necessary to avoid cracking and preserve hardness.

High-Speed Steel M2 bars are not ideal for high-temperature applications, as they can lose hardness and wear resistance above 540°C, limiting their performance in extreme heat conditions.

High-Speed Steel M2 bars should be stored in a dry, cool environment to prevent corrosion. They should be kept off the ground, ideally on wooden or metal racks, and away from moisture or chemicals.

High Speed Steel M2 Bars Uses

High Speed Steel M2 Bars find extensive application in the production of cutting tools like drills, taps, milling cutters, reamers, and lathe tools. Their impressive hardness, wear resistance, and heat tolerance make them ideal for high-speed machining and metalworking tasks. Industries such as automotive, aerospace, engineering, and general manufacturing depend on M2 Bars for precision tooling that can endure heavy-duty, continuous use without warping. Additionally, they are utilized in the creation of punches, dies, and saw blades, delivering consistent performance and extended tool life.

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