Brian Fasteners, located in Houston, USA, manufactures and supplies High Speed Steel T4 Bars. Known for its excellent wear resistance and red hardness, T4 is ideal for tough machining and cutting applications. Using vacuum induction melting and precise hot rolling, Brian Fasteners ensures tight dimensional tolerances and high metallurgical quality. Their T4 bars support the production of drills, reamers, taps, and saw blades. With quick delivery, custom sizes, and expert guidance, Brian Fasteners meets the needs of toolmakers looking for sturdy steel suitable for high-temperature machining environments.
HSS T4 typically contains about 0.75% carbon, 18% tungsten, 5% chromium, 1% vanadium, and 4% molybdenum. It offers tensile strengths of 2,200 to 2,600 MPa, yield strengths of 1,800 to 2,200 MPa, and hardness reaching 65 HRC after heat treatment. Exceptional red hardness maintains the cutting edge’s integrity up to 600 °C. Its composition balances toughness, wear resistance, and grinding performance, aiding high-speed machining life and stability.
| 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 |
| 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 |
| Country | USA | German | Japan |
| Standard | ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
| Grades | T4/T12004 | S 18-1-2-5/1.3255 | SKH3 |
| Properties | Metric | Imperial |
| Thermal expansion co-efficient | 11.9 µm/m°C | 6.6 µin/in°F |
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.
Brian Fasteners’ T4 bars are used to make taps, reamers, milling cutters, and gear cutters. They are also applied in saw blades and broaching tools. Suitable for heavy machining at high temperatures, T4 maximizes cutting efficiency and tool life. In the automotive, aerospace, and die-making industries, it supports high-performance tool production. Brian Fasteners supplies quality T4 bars to meet strict tool-making standards, allowing for precision finishes and productivity in industrial machining environments.






We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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