High Speed Steel T4 Bars

Hemi Metals, located in Hamilton, New Zealand, has built a solid reputation as a reliable manufacturer and supplier of top-notch High Speed Steel T4 Bars, perfect for those tough machining and tooling tasks. With a strong focus on quality, innovation, and precision, they produce T4 bars that adhere to strict international standards. Thanks to their cutting-edge production methods, these bars boast exceptional hardness, thermal stability, and wear resistance, making them ideal for high-performance cutting environments. Hemi Metals is dedicated to keeping their customers happy by ensuring a dependable supply, offering technical support, and delivering on time, catering to industries like automotive, engineering, fabrication, and precision machining both in New Zealand and around the globe.

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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 generally contain about 0.75–0.85% carbon, 4% chromium, 18% tungsten, along with significant vanadium additions to boost abrasion resistance. This tungsten-heavy makeup enhances hot hardness, cutting efficiency, and wear resistance. On the mechanical side, T4 bars provide excellent edge retention, impressive compressive strength, and reliable toughness during high-speed cutting tasks. Their ability to endure high temperatures without losing their hardness guarantees stable performance, extended tool life, and consistent dimensional accuracy in demanding machining situations.

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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

These High Speed Steel T4 Bars are commonly used to create high-performance cutting tools that function under extreme speeds and temperatures. You’ll find them in applications like drills, taps, broaches, reamers, end mills, form tools, and lathe tools. Their remarkable red-hardness and wear resistance make them perfect for machining alloy steels, cast iron, and abrasive materials. T4 bars are also employed in metal forming tools, punches, and precision dies across the automotive, aerospace, and engineering industries. Their ability to maintain sharpness and structural integrity ensures reliable cutting performance and boosts productivity in high-intensity manufacturing settings.

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