High Speed Steel M2 Bars

Semih Metals, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of High Speed Steel (HSS) M2 bars, known for their dependable performance in tooling and industrial applications around the globe. These M2 bars are celebrated for their perfect blend of hardness, toughness, and wear resistance. At Semih Metals, each bar is crafted with meticulous quality control to ensure they meet international standards. Industries such as machining, metalworking, die-making, and precision manufacturing rely on these bars, where cutting efficiency and tool longevity are crucial.

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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, or UNS T11302, is a molybdenum-based grade that features about 0.85% carbon, 6.0% tungsten, 5.0% molybdenum, 4.0% chromium, and 2.0% vanadium. This unique composition grants it impressive hardness and abrasion resistance while still maintaining good toughness. After undergoing proper heat treatment, M2 bars typically achieve hardness values ranging from 63 to 66 HRC. The alloy is recognized for its excellent grindability, red hardness (the ability to keep its hardness at elevated temperatures), and overall stability, making it a versatile choice for both high-speed and general-purpose tool applications.

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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 Semih 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

M2 bars are commonly used to manufacture cutting tools like twist drills, milling cutters, reamers, saw blades, punches, and dies. Their capacity to retain sharpness and structural integrity under heat and high stress makes them perfect for both manual and CNC machining operations. M2 strikes a great balance between performance and cost, which is why it’s one of the most popular high-speed steels in the metalworking, automotive, aerospace, and toolmaking industries. Its versatility and durability guarantee consistent results in both roughing and finishing operations across a range of materials, including carbon steel, alloy steel, and cast iron.

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