Bohler-Uddeholm,O1 Cold Work Tool Steel Wire

Bohler-Uddeholm O1 Cold Work Tool Steel Wire Product Information -:- For detailed product information, please contact sales. -: Bohler-Uddeholm O1 Cold Work Tool Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

Bohler-Uddeholm O1 Cold Work Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Böhler-Uddeholm O1 Cold Work Tool Steel** ## **Product Overview** **Böhler-Uddeholm O1** is a classic **oil-hardening, non-shrinking cold work tool steel** renowned for its excellent dimensional stability during heat treatment, good machinability in annealed condition, and balanced combination of wear resistance and toughness. As one of the most widely used and versatile tool steels globally, O1 offers reliable performance for a broad range of general-purpose tooling applications where high precision and minimal distortion are critical requirements. Its predictable behavior and ease of heat treatment make it a fundamental choice for toolmakers and machinists. --- ## **1. Key Characteristics & Advantages** - **Minimal Distortion:** The "non-shrinking" characteristic ensures exceptionally low dimensional changes during oil quenching, ideal for precision tools. - **Excellent Machinability:** Superior machinability in soft-annealed state compared to many air-hardening steels, reducing manufacturing time and cost. - **Good Wear Resistance:** Offers adequate wear resistance for many applications via its alloy carbide content. - **Ease of Heat Treatment:** Simple oil quenching process with relatively low austenitizing temperatures, accessible to most heat treatment facilities. - **Good Toughness:** Provides a reliable balance between hardness and impact resistance. - **Fine Grain Structure:** When properly heat treated, develops a fine microstructure conducive to sharp cutting edges. - **Cost-Effectiveness:** A versatile and economical choice for a wide array of tooling needs. --- ## **2. Typical Chemical Composition (Weight %)** | Element | Carbon (C) | Manganese (Mn) | Chromium (Cr) | Tungsten (W) | Vanadium (V) | | :--- | :---: | :---: | :---: | :---: | :---: | | **Content** | 0.90 | 1.20 | 0.50 | 0.50 | 0.10 | **Alloying Rationale:** - **Carbon (0.90%):** Provides the necessary hardness and wear resistance. - **Manganese (1.20%):** Increases hardenability and contributes to the "non-shrinking" characteristic. - **Chromium (0.50%) & Tungsten (0.50%):** Form hard, wear-resistant carbides and enhance hardenability. - **Vanadium (0.10%):** Refines grain size and improves toughness. --- ## **3. Physical & Mechanical Properties** ### **Physical Properties:** - **Density:** ~7.86 g/cm³ - **Thermal Conductivity:** ~45 W/(m·K) at 20°C - **Modulus of Elasticity:** ~210 GPa ### **Heat Treatment & Mechanical Data:** - **Annealed Hardness:** ~190 HBW - **Austenitizing Temperature:** 780 - 800°C (1435 - 1470°F) - **Quenching Medium:** Oil - **Tempering Temperature Range:** 150 - 300°C (300 - 570°F) - **Typical Working Hardness:** **58 - 62 HRC** - *58-59 HRC:* For applications requiring higher toughness. - *60-62 HRC:* For applications prioritizing wear resistance. - **Dimensional Change:** Typically exhibits minimal growth (~+0.05% to +0.10%) after hardening. --- ## **4. Main Applications** O1 is a general-purpose steel suitable for a vast array of low-to-medium production volume cold work tooling: - **Cutting Tools:** Blanking dies, piercing punches, lathe tools, form tools, and shear blades for mild steels and non-ferrous metals. - **Forming Tools:** Bending dies, embossing dies, and coining tools. - **Measuring & Guiding Tools:** Precision gauges, jigs, fixtures, and master tools where dimensional stability is paramount. - **Woodworking Tools:** High-quality knives, chisels, and plane blades. - **Plastic Molds:** Prototype molds, low-volume production molds, and hand molds. - **General Toolroom Applications:** Arbors, dowel pins, and other machined tool components. --- ## **5. Relevant International Standards & Comparable Grades** Böhler-Uddeholm O1 corresponds directly to several long-established international standards. | Standard | Grade / Designation | Country/Region | Note | | :--- | :--- | :--- | :--- | | **AISI / ASTM A681** | **O1** | USA | Direct equivalent. | | **DIN / Werkstoff Nr.** | **1.2510 / 90MnCrV8** | Germany / EU | Common European designation. The composition is very similar. | | **JIS G4404** | **SKS3** | Japan | The most common Japanese equivalent for general-purpose cold work. | | **ISO 4957** | **95MnWCr1** | International | Corresponding ISO tool steel grade. | | **BS 4659** | **BO1** | UK | British standard designation. | | **GB/T 1299** | **9Mn2V** | China | A commonly used Chinese equivalent with similar properties. | **Important:** While compositions across standards are very similar, the proprietary melting and processing techniques of Böhler-Uddeholm ensure superior internal cleanliness, consistency, and heat treatment response compared to generic O1 material. --- ## **6. Supply Form & Processing** - **Available Forms:** Ground flat stock, round bars, square bars, and custom blocks. - **Machining:** **Excellent machinability** in the annealed state. Use standard high-speed steel (HSS) or carbide tooling. - **Heat Treatment:** 1. Preheat to 650°C (1200°F). 2. Austenitize at 780-800°C in a controlled atmosphere to prevent decarburization. 3. Quench in well-circulated oil at 40-60°C (105-140°F). 4. Temper immediately after quenching (when the part reaches ~50°C). **Double tempering is recommended** for best dimensional stability and to relieve quenching stresses. - **Surface Treatment:** Can be nitrided or coated with PVD (e.g., TiN) for enhanced surface properties in specific applications. --- ## **7. Selection Guidance & Conclusion** **When to choose Böhler-Uddeholm O1:** - The application requires **exceptional dimensional stability** and minimal risk of distortion. - Tool complexity makes precise heat treatment response critical. - **Excellent machinability** is needed to reduce fabrication costs. - The production run is moderate, not requiring the extreme wear resistance of high-alloy steels like D2. - The heat treatment facility is equipped for oil quenching but may not have vacuum furnaces. **Conclusion:** **Böhler-Uddeholm O1** remains a cornerstone material in toolmaking due to its unbeatable combination of **stability, machinability, and proven reliability.** It is the quintessential "go-to" steel for precision tools, gauges, and a wide range of general cold work applications. For toolmakers seeking a predictable, easy-to-process material that delivers consistent results, O1 continues to be an indispensable and cost-effective choice in the modern workshop. -:- For detailed product information, please contact sales. -: Bohler-Uddeholm O1 Cold Work Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6878 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Bohler-Uddeholm O1 Cold Work Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Bohler-Uddeholm O1 Cold Work Tool Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers Bohler-Uddeholm O1 Cold Work Tool Steel Wire -:- For detailed product information, please contact sales. -:

Packing of Bohler-Uddeholm O1 Cold Work Tool Steel Wire -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Wire drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3349 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition