High Speed Steel T4 Bars

Phehlukwayo Metals was a well known manufacturer and suppliers in Cape Town, South Africa, manufacturing high-quality industrial metal products. Demonstrating an ability to achieve top quality, their range of metal products included, among others the very popular High Speed Steel (HSS) T4 bars whose strength, long life, great wear resistance properties, and efficiency in cutting them made them valuable for demanding processes in machining as well as industrial manufacturing. Phehlukwayo Metals puts a strong focus on customer satisfaction and reliable delivery, ensuring clients receive premium materials tailored to their specific needs while supporting industries such as engineering, automotive, and tool making.

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High Speed Steel T4 Round Rods

T4 Alloy High Speed Steel Bright Bars

T4 Alloy High Speed Steel Bars

Table of Contents

What is High Speed Steel T4 Bars ?

High-Speed Steel T4 bars contain tungsten, chromium, and molybdenum in the main percentages of 18-22%, 4-5%, and 1-2%, respectively. Other constituents include vanadium at 1.75-2.25%, carbon at 0.70-0.80%, and manganese at 0.30-0.50%. Such a composition allows for high hardness, resistance to wear, and the ability to resist high temperatures during cutting. The material typically has a Rockwell hardness of about 62-64 HRC and strength at elevated temperatures, which makes it suitable for machining tools and cutting applications. T4 bars exhibit good toughness and impact resistance. They can, therefore, be used for the production of high-performance tools applied in demanding industrial 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

High Speed Steel T4 Threaded Bars
High Speed Steel T4 Hot Rolled Bars
T4 Alloy High Speed Steel Flat Bar
T4 High Speed Steel Square Bars
T4 High Speed Steel Hexagon Bars
HSS T4 Round Bars And Rods

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Frequently Asked Questions (FAQ)

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.

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.

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 Bar is used in precision cutting tool manufacturing. It has great hardness and abrasion resistance, making it extremely useful in making drill bits, taps, milling cutters, reamers, and tool bits for working on hard material like steel or other metals. T4 bars are also used in the automobile, aerospace, and manufacturing sectors for making dies, punches, and other products that need a high resistance to wear and hardness at elevated temperatures. Their exceptional strength, toughness, and sharpness retention in extreme conditions make them suitable for high-performance cutting and forming applications.

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