Phehlukwayo Metal, located in Cape Town, South Africa, stands out as a top manufacturer and supplier of Tool and Die Steel O1 Bars. They provide high-quality solutions tailored to the precision tooling and engineering sectors. With a strong commitment to consistency, durability, and customer satisfaction, Phehlukwayo Metal ensures that their O1 steel bars meet international standards for both dimensional accuracy and metallurgical performance. Thanks to their advanced manufacturing techniques and strict quality control measures, they deliver superior products that are perfect for precision machining and heat treatment. Clients can rely on Phehlukwayo Metal as a trusted partner for dependable tool steel in demanding applications.
Tool and Die Steel O1 Bars, often referred to as AISI O1, are oil-hardening cold work tool steels. Their typical composition features about 0.90% carbon, 1.00–1.40% manganese, 0.50% chromium, 0.50% tungsten, and 0.30% vanadium. O1 steel is known for its excellent dimensional stability during heat treatment, along with impressive hardness and wear resistance. With a tensile strength ranging from 1700 to 2000 MPa and moderate toughness, O1 steel is also easy to machine and polish. Its predictable hardening characteristics and minimal distortion make it a go-to choice for precision tool manufacturing, especially in applications that demand close tolerances and consistent performance.
| 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 widely used for crafting tools that require high dimensional accuracy and wear resistance. Common applications include dies, cutting tools, gauges, punches, knives, broaches, and measuring instruments. The oil-hardening feature of O1 steel ensures minimal distortion during heat treatment, making it ideal for intricate or precision components. It’s particularly popular in the mold-making, woodworking, and general engineering fields, where reliable performance and fine finishes are essential. Thanks to its machinability, toughness, and durability, O1 steel remains a favored option for cold work tool applications that prioritize hardness and precision.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phehlukwayo Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Cape Town, South Africa
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