Semih Metals, an Istanbul-based Turkish company, is a foremost tool and die steel O1 bar manufacturer and supplier, which offers high-quality oil-hardening tool steel with good machinability and dimensional stability for precision tooling and die-making processes. With its good machinability and dimensional stability, O1 tool steel is a first choice in metalworking, mold-making, and general manufacturing industries. Semih Metals maintains each O1 bar to high standards of quality and performance via sophisticated manufacturing techniques and strict quality control. Through steady supply capabilities and customer-oriented service, Semih Metals is a reliable business partner for long-life and high-performance tool steel solutions.
Tool and Die Steel O1 is a high-carbon, oil-hardening tool steel with the typical composition of 0.9% carbon, 1.0–1.2% manganese, and minute quantities of chromium, tungsten, and vanadium. It is renowned for its great wear resistance, edge holding capacity, and good stability in dimensions during heat treatment. O1 oil hardens, which reduces distortion over water-hardening steels. It undergoes a normal hardness of 57–63 HRC after sufficient heat treatment and possesses good toughness and machinability in annealed state, becoming ideal for intricate or precision-machined tools.
| 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.
O1 tool steel bars are often utilized in applications where surface hardness is high, there is good wear resistance, and dimensional accuracy. Some common applications are dies, punches, cutting tools, broaches, knives, gauges, and plastic and rubber processing molds. It finds particular popularity in applications where fine detail and sharp edges are critical, for instance in woodworking or engraving tools. Because of its oil-hardening property, O1 provides tighter control over distortion compared to water-hardening grades and is, therefore, suitable for tools whose dimensions and surface finishes have to be precise after heat treatment.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
Copyright 2024 Semih Metals. All rights reserved
