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

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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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

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Frequently Asked Questions (FAQ)

Can High-speed Steel M2 Be Welded?

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.

Are High Speed Steel M2 Bars Suitable For High-Temperature Applications?

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.

How Should High-speed Steel M2 Bars Be Stored?

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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