Hyderabad-based Dhruv Metals is a renowned metals company that provides quality metal products and precision engineering services. Dhruv Metals has a commitment to quality, and due to this, it serves the varied needs of the industries through a variety of superior material offerings. High-Speed Steel (HSS) M42 Bars is one of its star products that is famous for its superior hardness, wear resistance, and cutting performance. These bars are best used in the high-performance applications of tooling, machining, and cutting operations. With years of experience behind them, Dhruv Metals provides strong, efficient, and reliable solutions to assist with modern manufacturing and engineering demands.
M42 High-Speed Steel Bars consist of around 1.05% Carbon, 4.0% Molybdenum, 8.0% Cobalt, 2.0% Vanadium, and 1.0% Tungsten, with minor additions of Chromium and Manganese. This alloying for specialty applications provides outstanding hardness (68–70 HRC), good red hardness, and significant wear resistance. M42 maintains keen cutting edges even at high temperatures, due to the thermal resistance to softening. These mechanical properties render M42 a material of choice for high-speed machining, providing stable edge retention, toughness, and predictable performance under adverse industrial conditions.
| ASTM A600 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| M42 | 1.05 | 1.15 | 0.15 | 0.40 | 0.03 | 0.03 | 0.15 | 0.65 | 3.50 | 4.25 | 0.95 | 1.35 | 9.00 | 10.00 | 1.15 | 1.85 | 7.75 | 8.75 |
| DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| 1.3247/HS2-9-1-8 | 1.05 | 1.15 | … | … | … | … | … | 0.70 | 3.50 | 4.50 | 0.90 | 1.30 | 9.00 | 10.00 | 1.20 | 1.90 | 7.50 | 8.50 |
| JIS G4403 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
| SKH59 | 1.05 | 1.15 | … | 0.40 | 0.03 | 0.03 | … | 0.70 | 3.50 | 4.50 | 0.90 | 1.30 | 9.00 | 10.00 | 1.20 | 1.90 | 7.50 | 8.50 |
| Mechanical Properties | Metric | Imperial |
| Hardness, Rockwell C (oil quenched from 1204°C, 5 minutes) | 64.3 | 64.3 |
| Hardness, Rockwell C (oil quenched from 1177°C, 5 minutes) | 65.5 | 65.5 |
| Hardness, Rockwell C(oil quenched from 1163°C) | 65.8 | 65.8 |
| Izod impact unnotched (oil quenched at 1191°C; 510°C temper temperature) | 13.6 J | 10.0 ft- lb |
| Izod impact unnotched (oil quenched at 1191°C; 622°C temper temperature) | 24.4 J | 24.4 J |
| Machinability (1% carbon steel) | 35.0 – 40.0% | 35.0 – 40.0% |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30457 ksi |
| Country | USA | German | Japan |
| Standard | ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
| Grades | M42 | 1.3247/HS2-9-1-8 | SKH59 |
Yes, High-Speed Steel M42 can be welded, but it requires specialized techniques like preheating, post-weld heat treatment, and using appropriate filler materials to avoid cracking and maintain its properties.
Yes, High Speed Steel M42 bars are recyclable. They can be melted and reused in manufacturing, reducing waste and conserving resources, making them an environmentally friendly material choice.
HSS M42 Bars are commonly applied in the production of precision cutting tools like drills, end mills, reamers, taps, saw blades, and others. The inclusion of cobalt strengthens the red-hardness, enabling tools to preserve their cutting edge even in extensive high-speed operations. These bars are also used in die, mold, and heavy-duty tooling part production, where toughness, heat resistance, and durability are required. Excellent wear resistance and stability of the edge render M42 a popular choice in applications such as aerospace, automotive, and heavy metalworking, where operation at harsh conditions is an essential requirement.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Dhruv Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hyderabad , India
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