High Speed Steel T4 Bars

Semih Metals, located in Istanbul, Turkey, has earned a solid reputation as a reliable manufacturer and supplier of High Speed Steel (HSS) T4 Bars. They specialize in providing top-notch tool steel solutions for industries that demand high performance and durability. HSS T4 Bars are crafted to retain their hardness even at elevated temperatures, delivering outstanding wear resistance, toughness, and cutting efficiency. Semih Metals is committed to precise manufacturing, rigorous quality control, and adherence to international standards. Their HSS T4 Bars come in a variety of sizes and specifications, making them perfect for manufacturers of cutting tools, machining equipment, and precision engineering components where long-lasting performance and reliability are crucial.

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High Speed Steel T4 Round Rods

T4 Alloy High Speed Steel Bright Bars

T4 Alloy High Speed Steel Bars

What is High Speed Steel T4 Bars ?

These High Speed Steel T4 Bars are primarily made up of carbon (0.70–0.80%), tungsten (12–14%), chromium (4–5%), vanadium (1%), molybdenum (2%), and cobalt (1–2%), which makes them ideal for high-speed cutting applications. This unique composition grants them exceptional hardness, wear resistance, and red-hardness, meaning they can maintain their hardness even at high temperatures. Mechanically, T4 HSS Bars boast a tensile strength of 1800–2200 MPa, hardness levels between 62–64 HRC when fully hardened, and impressive toughness. The combination of high-speed cutting capability, dimensional stability, and resistance to deformation ensures they perform exceptionally well in demanding machining tasks.

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High Speed Steel T4 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 T4 Bars

ASTM A600	C		Mn		P	S	Si		Cr		V		W		Mo		Co
T4	0.70	0.80	0.10	0.40	0.03	0.03	0.20	0.40	3.75	4.50	0.80	1.20	17.50	19.00	0.40	1.00	4.25	5.75
DIN ISO 4957	C		Mn		P	S	Si		Cr		V		W		Mo		Co
S 18-1-2-5/1.3255	0.75	0.83	…	0.40	0.03	0.03	…	0.45	3.80	4.50	0.80	1.20	17.50	18.50	0.50	0.80	4.50	5.50
JIS G4403	C		Mn		P	S	Si		Cr		V		W		Mo		Co
SKH3	0.73	0.83	…	0.40	0.03	0.03	…	0.45	3.80	4.50	0.80	1.20	17.00	19.00	…	…	4.50	5.50

Mechanical Properties of High Speed Steel T4 Bars

Density [g/cm3]	8.70
Properties	Metric	Imperial
Modulus of elasticity	190-210 GPa	27557-30458 ksi
Poisson’s ratio	0.27-0.30	0.27-0.30

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Equivalent Grades of High Speed Steel T4 Bars

Country	USA	German	Japan
Standard	ASTM A600	DIN EN ISO 4957	JIS G4403
Grades	T4/T12004	S 18-1-2-5/1.3255	SKH3

Thermal Properties of High Speed Steel T4 Round Bars

Properties	Metric	Imperial
Thermal expansion co-efficient	11.9 µm/m°C	6.6 µin/in°F

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High Speed Steel T4 Bars Types

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Frequently Asked Questions (FAQ)

How Are High Speed Steel T4 Bars Sized?

High Speed Steel T4 bars are sized by diameter and length, typically ranging from 1/4" to 10" in diameter, with standard lengths of 12 to 20 feet, depending on manufacturer specifications.

How Are High Speed Steel T4 Bars and Rods Manufactured?

High Speed Steel T4 bars and rods are manufactured through alloying, melting, forging, and heat treatment processes, followed by precision machining to achieve desired hardness, strength, and dimensional accuracy for industrial use.

How Should High-speed Steel T4 Bars Be Stored?

High-speed steel T4 bars should be stored in a dry, clean environment, protected from moisture and corrosion. Store them on flat, secure surfaces to prevent deformation or damage.

High Speed Steel T4 Bars Uses

HSS T4 Bars are widely utilized in the production of cutting tools, drills, reamers, taps, milling cutters, broaches, and gear cutters. They excel in high-speed machining of metals, including stainless steel and alloy steels, where wear and heat resistance are vital. Other applications include dies, punches, and precision engineering components that need to withstand heavy loads. The remarkable red-hardness and toughness of HSS T4 Bars make them essential in automotive, aerospace, and industrial manufacturing, guaranteeing efficiency, precision, and a long service life for high-performance tooling applications.

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