High Speed Steel T4 Bars

Starc Metals, located in Canberra, Australia, stands out as a top manufacturer and supplier of high-quality metals, with a special focus on High Speed Steel (HSS) products. One of their standout offerings is the High Speed Steel T4 Bars, which are celebrated for their remarkable hardness, wear resistance, and durability even in the toughest conditions. With a strong commitment to precision engineering and high material standards, Starc Metals serves industries that need dependable cutting and machining solutions. Their T4 Bars go through rigorous quality control to guarantee consistent performance, making them a go-to choice for both local and industrial clients looking for premium HSS products in Australia.

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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 are made from alloyed steels that contain about 0.85–1.0% carbon, 4–5% chromium, 5–6% tungsten, 1% vanadium, and small amounts of molybdenum. This carefully crafted blend results in excellent hardness, impressive wear resistance, and outstanding toughness, even at high temperatures. Typically, when heat-treated, T4 Bars achieve a hardness of 62–64 HRC, allowing them to maintain cutting performance during high-speed machining. Their mechanical properties, which include high tensile strength, compressive strength, and resistance to thermal softening, make them perfect for creating cutting tools, drills, and dies that require precision and longevity.

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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

T4 Bars are extensively used in the production of precision cutting tools like drills, taps, milling cutters, reamers, and lathe tools. Their ability to hold hardness at elevated temperatures makes them ideal for high-speed machining and metalworking tasks. Additionally, T4 Bars are utilized in the manufacturing of dies, punches, and other components that need to be tough and durable. Industries such as automotive, aerospace, engineering, and general manufacturing depend on these bars for reliable performance under demanding operational conditions. Starc Metals guarantees that their T4 Bars comply with industry standards, ensuring dependable quality.

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