Chuck Metals is a reputable manufacturer and supplier based in Singapore, Pulau Ujong, known for its top-notch High Speed Steel T4 Bars. These bars are celebrated for their outstanding wear resistance, toughness, and impressive red-hardness properties. Designed to provide reliable performance in high-speed machining and cutting tasks, T4 HSS Bars are an upgraded version of T1 steel, enhanced with cobalt to boost heat resistance. With meticulous manufacturing standards and consistent quality, Chuck Metals guarantees that these bars meet the rigorous demands of toolmakers and industrial applications that require exceptional durability.
High Speed Steel T4 Bars typically contain about 0.80–0.85% carbon, 3.8–4.5% chromium, 4.5–5.5% molybdenum, 17.25–18.5% tungsten, 1.1–1.4% vanadium, and 4.5–5.5% cobalt. The addition of cobalt significantly enhances red hardness, allowing tools to maintain their cutting edges even at high temperatures. With proper heat treatment, these bars can achieve hardness levels of 63–66 HRC, providing them with remarkable wear life and cutting efficiency in challenging environments.
| 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.
High Speed Steel T4 Bars are commonly utilized in the production of high-performance cutting tools, including drills, milling cutters, reamers, taps, and gear cutters. They excel in machining hard and abrasive materials like stainless steel, titanium alloys, and heat-resistant superalloys. Their exceptional hot hardness and wear resistance make them a favored choice in industries such as aerospace, automotive, heavy engineering, and precision manufacturing, where long-lasting tool life and high-speed operation are crucial.






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