High Speed Steel T4 Bars

Aiman Metals, Kuala Lumpur, Malaysia is a well-known industrial metal product manufacturer and supplier of high-quality products to various industries with reliability and precision. Of its vast array of products, High-Speed Steel (HSS) T4 Bars find special value as superior hardness, lengthy life span, and enhanced wear resistance. Renowned for steady performance in hot cutting operations, T4 Bars are a reliable option for heavy-duty machining and manufacturing requirements. With a patient focus on customer satisfaction and timely delivery, Aiman Metals supplies industries like engineering, automotive, aerospace, and tool making with materials that guarantee efficiency and durability.

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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 ?

High-Speed Steel T4 Bars consist chiefly of 18–22% Tungsten, 4–5% Chromium, and 1–2% Molybdenum, with 1.75–2.25% Vanadium, 0.70–0.80% Carbon, and 0.30–0.50% Manganese. This makes them provide excellent wear resistance, edge retention, and stability under severe cutting conditions. Mechanically, T4 Bars generally have a Rockwell hardness of 62–64 HRC, along with good toughness and thermal strength. Their excellent impact resistance and hardness at high temperatures make them particularly appropriate for precision tool making, machining, and heavy industry work, with long life and stable performance in hostile environments.

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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

High-Speed Steel T4 Bars are commonly utilized for the manufacture of precision cutting tools on account of their hardness, abrasion resistance, and longevity. They are widely used to manufacture drill bits, taps, milling cutters, reamers, and tool bits for machining steels and other hard materials. T4 is utilized in manufacturing punches, dies, and molds for the automotive, aerospace, and machinery industries. Its higher toughness and wear resistance enable it to endure high temperatures and loads during machining. With lasting edge sharpness and stability, T4 Bars provide efficiency, productivity, and consistency in high-speed cutting and forming operations.

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