Luois Metals stands out as a reliable manufacturer and supplier of High Speed Steel M42 Bars, proudly operating from Houston, USA. We specialize in high-performance tool steel solutions that offer remarkable hardness, wear resistance, and red hardness, perfect for those tough machining tasks. M42, a cobalt-infused high-speed steel, is renowned for its ability to keep cutting edges sharp even in extreme heat. Our M42 bars come in various sizes, heat-treated conditions, and finishes, tailored to meet the unique demands of industries like aerospace, automotive, and metalworking. At Luois Metals, we prioritize precision, dependability, and timely delivery.
High Speed Steel M42 Bars are made up of a blend of carbon, tungsten, molybdenum, chromium, vanadium, and about 8% cobalt. This unique mix grants the steel impressive hot hardness, enabling it to maintain its cutting prowess even at soaring temperatures of up to 600°C. With a Rockwell hardness rating reaching as high as 68 HRC, M42 is among the hardest high-speed steels available on the market. It also boasts exceptional wear resistance, edge retention, and toughness, making it perfect for cutting through high-strength alloys, stainless steel, and heat-treated metals.
| 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.
M42 Bars are widely utilized in crafting high-performance cutting tools, including drills, taps, end mills, broaches, and gear cutters. Their outstanding red hardness and wear resistance make them the go-to choice for high-speed machining, heavy-duty cutting tasks, and precision tooling. M42 is particularly popular for applications that require long tool life and reliable performance under thermal stress. Luois Metals offers High Speed Steel M42 Bars in custom lengths and specifications, catering to the exacting standards of toolmakers and industrial engineers across a diverse range of sectors.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis 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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