Welcome to Maduka Metals, your trusted partner in Abuja for industrial-grade materials that stand up to the most demanding tasks. We specialize in supplying high-performance High Speed Steel M35 bars, bringing a commitment to quality and reliability directly to Nigeria’s vibrant manufacturing and engineering sectors. Our focus is on empowering local industry with the superior tools needed for precision and efficiency, ensuring your projects are built on a foundation of excellence and durability right here in the heart of the nation.
These M35 bars are distinguished by their unique cobalt-enhanced composition, which includes tungsten, molybdenum, vanadium, and a significant amount of cobalt. This specific blend gives the steel exceptional red-hardness, meaning it retains its strength and cutting edge even when exposed to the high temperatures generated during rapid machining operations. The result is a material with superior wear resistance, high hardness levels, and an impressive ability to withstand intense friction without losing its structural integrity.
| ASTM A600 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| M35 | 0.82 | 0.95 | 0.15 | 0.40 | 0.03 | 0.03 | 0.20 | 0.45 | 3.80 | 4.50 | 1.75 | 2.15 | 4.75 | 5.25 | 5.50 | 6.50 | 4.60 | 5.00 |
| DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| 1.3243/HS6-5-2-5 | 0.87 | 0.95 | … | 0.40 | 0.03 | 0.03 | … | 0.45 | 3.80 | 4.50 | 1.70 | 2.10 | 4.70 | 5.20 | 5.90 | 6.70 | 4.50 | 5.00 |
| JIS G4403 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| SKH55 | 0.87 | 0.95 | … | 0.40 | 0.03 | 0.03 | … | 0.45 | 3.80 | 4.50 | 1.70 | 2.10 | 4.70 | 5.20 | 5.90 | 6.70 | 4.50 | 5.00 |
| Temperature °C / °F | |||||||
| 20 / 70 | 400 / 750 | 600 / 1110 | |||||
| Density | Kg/m³ lbs/in³ | 8150 .294 | 8050 .290 | 7990 .228 | |||
| Modulus of Elasticity | kN/mm³² psi | 230 34 · 10 6 | 205 31 · 10 6 | 184 27 · 10 6 | |||
| Coefficient of Thermanl expansion from 20°C / 70°F | per °C per °F | – | 11.6 · 10-6 6.4 · 10-6 | 11.9 · 10-6 6.6 · 10-6 | |||
| Thermal Conductivity | W/m °C Btu/sq. ft. h °F/in. | 24 166 | 28 194 | 27 187 | |||
| Specific Heat | J/kg °C Btu/lb °F | 420 0.10 | 510 0.12 | 600 0.14 | |||
| Country | USA | German | Japan |
| Standard | ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
| Grades | M35 | 1.3243/HS6-5-2-5 | SKH55 |
| Thermal properties | Metric | Imperial |
| CTE, linear (@21 – 399°C / 69.8 – 750°F) | 11.4 μm/m°C | 6.33 μin/in°F |
| CTE, linear (@21 – 593°C /69.8 – 1100°F) | 11.5 μm/m°C | 6.39 μin/in°F |
| Type | SIZES (mm) | SIZES (Inches) | ISO Tolerance |
|---|---|---|---|
| Cold Drawn and Ground | 10.00 – 75.00 | 5/6″ – 2.50″ | h8-h9-h10-h11 |
| Peeled and Polished | 40.00 – 150.00 | 1.50″ – 6.00″ | h11, h11-DIN 1013 |
| Peeled and Ground | 20.00 – 50.00 | 3/4″ – 2.00″ | h9-h10-h11 |
| Cold Drawn and Polish | 3.00 – 75.00 | 1/8″ – 3.00″ | h8-h9-h10-h11 |
Yes, High-Speed Steel M35 can be welded, but it requires careful control of heat and preheating. Post-weld heat treatment is often necessary to restore its hardness and performance.
Yes, High-Speed Steel M35 bars can be customized in terms of dimensions, shape, and surface finish. Machining and heat treatment processes can also be tailored to meet specific performance requirements.
High-Speed Steel M35 bars should be stored in a dry, cool environment, away from moisture and extreme temperatures. They should be kept on racks to prevent contact with corrosive materials.
The remarkable toughness and heat resistance of M35 steel make it the ideal choice for a wide range of heavy-duty applications. It is primarily used to create high-performance cutting tools like drills, end mills, and taps that need to work efficiently on tough materials such as stainless steel and high-temperature alloys. Beyond cutting, these bars are also expertly fashioned into forming tools, punches, and blades for industrial machinery, where their durability ensures longer service life and greater productivity in demanding workshop environments.






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