Louis Metals is a reliable manufacturer and supplier of Tool and Die Steel O1 Bars located in Houston, USA. O1 is an oil-hardening cold-work tool steel characterized by superior dimensional accuracy, edge retention, and good toughness. Our O1 bars are heat-treated and precision machined to satisfy the demands of die-making and cutting tool businesses. At Louis Metals, we use strict quality control procedures to provide bars with stable metallurgical properties. The bars are extensively applied in precision machining, dies, and molds where a better surface finish, resistance to wear, and consistent performance are needed.
Tool and Die Steel O1 Bars consist of about 0.9% carbon, 1.0% manganese, 0.5% chromium, and trace amounts of tungsten and vanadium. The steel possesses excellent hardness of 57–63 HRC when oil quenched and tempered. It possesses moderate wear resistance and outstanding dimensional stability when heat treated. With fine machinability in the annealed condition, O1 also has a tensile strength of up to 1000 MPa. It‘s best for applications that demand acute cutting edges and minimum distortion under heat processing.
| CHEMICAL PROPERTIES | O1 STEEL (%) |
|---|---|
| Carbon | 0.85-1.00 |
| Manganese | 1.00-1.40 |
| Silicon | 0.50 |
| Chromium | 0.40-0.60 |
| Nickel | 0.30 |
| Tungsten | 0.40-0.60 |
| Vanadium | 0.30 |
| Copper | 0.25 |
| Phosphorus | 0.03 |
| Sulfur | 0.03 |
| MECHANICAL PROPERTIES | O1 STEEL (Imperial) |
|---|---|
| Tensile Strength | 245000 psi |
| Yield Strength | 218000 psi |
| Elongation at Break | 0.00% |
| Modulus of Elasticity | 31000 ksi |
| Hardness (Rockwell) | 50 |
| Hardness (Vickers) | 517 |
| Hardness (Knoop) | 513 |
| Country | USA | German | Japan |
| Standard | ASTM A681 | DIN EN ISO 4957 | JIS G4404 |
| Grades | O1 | 1.2510/100MnCrW4 | SKS3 |
| Properties | Conditions | ||
| T (°C) | Treatment | ||
| Thermal expansion | 10.6 x 10-6/ºC | 20-260 | – |
When choosing O1 tool and die steel bars, consider factors like hardness, wear resistance, machinability, heat treatment requirements, intended application (e.g., cutting, stamping), and cost-effectiveness for long-term use.
O1 tool and die steel bars have moderate resistance to corrosion due to their carbon content and alloy composition. However, they are not stainless and can rust without proper maintenance, such as coating or regular oiling.
Tool and Die Steel O1 Bars are heavily utilized in precision tooling applications like cutting dies, blanking tools, broaches, punches, and knives. As a result of its oil-hardening properties and stability, O1 is well suited for tools that need high precision and sharpness. It finds extensive use in tool and mold making, metal stamping, as well as woodworking industries. Because of its tendency to maintain a sharp edge, it can also be used for chisels and engraving tools. O1‘s good finish quality and thermal stability make it possible to enjoy consistent long-term performance when used in medium-load mechanical applications.
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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