High Speed Steel M35 Bars

Semih Metals, located in Istanbul, Turkey, is a well-regarded manufacturer and supplier of High Speed Steel (HSS) M35 bars, celebrated for their outstanding hardness, toughness, and wear resistance. Tailored to meet the rigorous demands of high-performance cutting and tooling applications, Semih Metals ensures that M35 bars are produced under strict quality controls for consistent reliability. These bars are essential in industries like metalworking, automotive, aerospace, and manufacturing, where precision and durability are vital for effective machining operations.

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M35 Alloy High Speed Steel Bar

High Speed Steel M35 Round Rod

HSS M35 Bars

What is High Speed Steel M35 Bars ?

High Speed Steel M35 is a cobalt-alloyed grade that contains around 1.0% carbon, 5% cobalt, 6% molybdenum, 6% tungsten, 4% chromium, and trace amounts of vanadium. This unique composition boosts red hardness and toughness, allowing M35 to maintain its cutting performance even at high temperatures. Typically, after heat treatment, M35 bars reach a hardness of 66–68 HRC, providing excellent wear resistance and thermal stability. The alloy also offers good grindability and edge retention, making it perfect for demanding tool manufacturing.

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High Speed Steel M35 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 M35 Bars

ASTM A600	C		Mn		P	S	Si		Cr		V		Mo		W		Co
M35	0.82	0.95	0.15	0.40	0.03	0.03	0.20	0.45	3.80	4.50	1.75	2.15	4.75	5.25	5.50	6.50	4.60	5.00
DIN ISO 4957	C		Mn		P	S	Si		Cr		V		Mo		W		Co
1.3243/HS6-5-2-5	0.87	0.95	…	0.40	0.03	0.03	…	0.45	3.80	4.50	1.70	2.10	4.70	5.20	5.90	6.70	4.50	5.00
JIS G4403	C		Mn		P	S	Si		Cr		V		Mo		W		Co
SKH55	0.87	0.95	…	0.40	0.03	0.03	…	0.45	3.80	4.50	1.70	2.10	4.70	5.20	5.90	6.70	4.50	5.00

Mechanical Properties of High Speed Steel M35 Bars

Temperature °C / °F
20 / 70		400 / 750	600 / 1110
Density	Kg/m³ lbs/in³	8150 .294	8050 .290	7990 .228
Modulus of Elasticity	kN/mm³² psi	230 34 · 10 6	205 31 · 10 6	184 27 · 10 6
Coefficient of Thermanl expansion from 20°C / 70°F	per °C per °F	–	11.6 · 10-6 6.4 · 10-6	11.9 · 10-6 6.6 · 10-6
Thermal Conductivity	W/m °C Btu/sq. ft. h °F/in.	24 166	28 194	27 187
Specific Heat	J/kg °C Btu/lb °F	420 0.10	510 0.12	600 0.14

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Equivalent Grades of High Speed Steel M35 Bars

Country	USA	German	Japan
Standard	ASTM A600	DIN EN ISO 4957	JIS G4403
Grades	M35	1.3243/HS6-5-2-5	SKH55

Thermal Properties of High Speed Steel M35 Bars

Thermal properties	Metric	Imperial
CTE, linear (@21 – 399°C / 69.8 – 750°F)	11.4 μm/m°C	6.33 μin/in°F
CTE, linear (@21 – 593°C /69.8 – 1100°F)	11.5 μm/m°C	6.39 μin/in°F

M35 High Speed Steel Bar Standard Sizes

Type	SIZES (mm)	SIZES (Inches)	ISO Tolerance
Cold Drawn and Ground	10.00 – 75.00	5/6″ – 2.50″	h8-h9-h10-h11
Peeled and Polished	40.00 – 150.00	1.50″ – 6.00″	h11, h11-DIN 1013
Peeled and Ground	20.00 – 50.00	3/4″ – 2.00″	h9-h10-h11
Cold Drawn and Polish	3.00 – 75.00	1/8″ – 3.00″	h8-h9-h10-h11

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High Speed Steel M35 Bars Types

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Frequently Asked Questions (FAQ)

Can High-speed Steel M35 Be Welded

Yes, High-Speed Steel M35 can be welded, but it requires careful control of heat and preheating. Post-weld heat treatment is often necessary to restore its hardness and performance.

Are High-Speed Steel M35 Bars Customizable?

Yes, High-Speed Steel M35 bars can be customized in terms of dimensions, shape, and surface finish. Machining and heat treatment processes can also be tailored to meet specific performance requirements.

How Should High-speed Steel M35 Bars Be Stored?

High-Speed Steel M35 bars should be stored in a dry, cool environment, away from moisture and extreme temperatures. They should be kept on racks to prevent contact with corrosive materials.

High Speed Steel M35 Bars Uses

M35 bars are commonly utilized in creating high-performance cutting tools such as drills, milling cutters, taps, reamers, and broaches. Their exceptional hardness and toughness make them ideal for machining tough materials, including stainless steel, high-strength alloys, and superalloys. With enhanced heat resistance and durability, these bars ensure a longer tool life and superior performance in high-speed and heavy-duty machining environments. M35 bars are the go-to choice for industries that require precision tooling capable of enduring challenging operational conditions.

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