Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1)

Latrobe LSS™ O1 Tool Steel Spherical Powder (ASTM O1) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ O1 Tool Steel Spherical Powder (ASTM O1) Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1) characteristics -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1) Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1) Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1) Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Latrobe LSS™ O1 Tool Steel (ASTM O1) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Latrobe LSS™ O1 Tool Steel (ASTM A681)** **Latrobe LSS™ O1** is a premier-grade, **oil-hardening, non-deforming cold work tool steel** that has established itself as the **industry benchmark for general-purpose tooling applications**. Classified under AISI O1 specification (ASTM A681), this versatile steel offers an outstanding balance of wear resistance, dimensional stability, toughness, and ease of fabrication. O1 represents the most widely used and trusted oil-hardening tool steel worldwide, valued for its predictable performance, straightforward heat treatment, and excellent all-around properties. The defining advantage of LSS™ O1 lies in its **exceptional combination of machinability in the annealed state and minimal distortion during heat treatment**. As a workhorse material for toolrooms and production environments, O1 provides reliable performance across a broad spectrum of applications where consistent quality and cost-effectiveness are paramount. --- ## **1. Chemical Composition** Latrobe LSS™ O1 features a balanced composition optimized for stability and performance: | Element | Content (%) | Function | | :--- | :--- | :--- | | Carbon (C) | 0.85 - 1.00 | Provides hardness and wear resistance | | Manganese (Mn) | 1.00 - 1.40 | Increases hardenability and strength | | Chromium (Cr) | 0.40 - 0.60 | Enhances hardenability and wear resistance | | Tungsten (W) | 0.40 - 0.60 | Forms hard carbides for wear resistance | | Vanadium (V) | 0.15 - 0.30 | Refines grain structure, improves toughness | | Silicon (Si) | 0.50 max | Deoxidizer, strengthens ferrite | | **Balance** | Iron (Fe) | | *(Composition conforms to ASTM A681 Grade O1 specifications)* --- ## **2. Physical & Mechanical Properties** ### **Annealed Condition Properties:** - **Hardness:** 183 - 207 HB (Brinell) - **Machinability:** Excellent (rated 65% of 1% carbon steel standard) - **Density:** 7.86 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity:** 200 GPa (29 × 10⁶ psi) - **Thermal Conductivity:** 42.0 W/m·K at 20°C - **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/°C (20-100°C) ### **Heat Treatment Characteristics:** - **Hardening Method:** Oil quenching - **Austenitizing Temperature:** 790°C - 815°C (1450°F - 1500°F) - **Preheating:** 650°C (1200°F) recommended - **Quenching Medium:** Fast oil at 40-60°C (100-140°F) - **Tempering Range:** 150°C - 260°C (300°F - 500°F) ### **Hardened & Tempered Properties:** - **Typical Hardness Range:** **58 - 62 HRC** (Rockwell C) - **Transverse Rupture Strength:** 2,800 - 3,300 MPa - **Compressive Strength:** 2,400 - 2,800 MPa - **Charpy Impact Value:** 15 - 25 J (unnotched, tempered at 200°C) - **Key Characteristics:** - **Minimal Distortion:** <0.1% dimensional change with proper heat treatment - **Good Wear Resistance:** Suitable for most cold work applications - **Excellent Toughness:** Resists chipping and cracking - **Uniform Hardness:** Consistent through-hardening in sections up to 75mm (3") --- ## **3. International Standards & Cross-Reference** | Country/Region | Standard | Designation | | :--- | :--- | :--- | | **United States** | ASTM A681 | Grade O1 | | | AISI | O1 | | | UNS | T31501 | | **Germany** | DIN 17350 | 1.2510 | | | Werkstoff Nr. | 1.2510 | | **Japan** | JIS G4404 | SK S1 | | **United Kingdom** | BS 4659 | BO1 | | **Sweden** | SS 14 2160 | 2160 | | **France** | AFNOR | Y1 90 CV 4 | | **International** | ISO 4957 | 95MnWCr1 | --- ## **4. Product Applications** ### **Primary Tooling Applications:** - **Blank and Piercing Dies:** For sheet metal up to 3mm thickness - **Forming Tools and Bending Dies:** Requiring dimensional stability - **Thread Rolling Dies:** For standard production runs - **Knurling Tools and Burnishing Rolls** - **Gauges, Jigs, and Fixtures:** Where precision is critical - **Machine Tool Components:** Bushings, wear plates, guides ### **Cutting Tools:** - **Knives and Blades:** Industrial, paper, and plastic cutting - **Woodworking Tools:** Chisels, plane blades, carving tools - **Metal Cutting Tools:** Taps, reamers, broaches (short run) ### **Special Applications:** - **Plastic Injection Molds:** For low to medium production - **Stamping and Embossing Dies:** For non-ferrous materials - **Master Models and Patterns:** Requiring dimensional stability - **Hand Tools:** Professional-grade wrenches, pliers, screwdrivers --- ## **5. Processing Guidelines** ### **Machining (Annealed State):** - **Turning Speed:** 30-45 m/min (100-150 ft/min) - **Drilling Speed:** 15-25 m/min (50-80 ft/min) - **Milling Speed:** 20-35 m/min (65-115 ft/min) - **Tool Material:** High-speed steel or carbide - **Chip Formation:** Produces short, broken chips ### **Heat Treatment Procedure:** 1. **Preheating:** 650°C (1200°F) for 30 minutes per inch 2. **Austenitizing:** 800°C (1475°F) for 20-30 minutes per inch 3. **Quenching:** Agitated oil at 40-60°C (100-140°F) 4. **Tempering:** Immediately after quenching - For 58-60 HRC: 175-205°C (350-400°F) for 2 hours - For 56-58 HRC: 230-260°C (450-500°F) for 2 hours - Double tempering recommended for optimal stability ### **Grinding:** - **Wheel Selection:** Aluminum oxide, medium grade - **Wheel Speed:** 25-30 m/s (5000-6000 SFPM) - **Coolant:** Essential to prevent overheating - **Technique:** Light passes with good wheel dressing ### **Stress Relieving:** - **After Rough Machining:** 650°C (1200°F) for 2 hours, slow cool - **After EDM:** 150-175°C (300-350°F) for 2-4 hours --- ## **6. Technical Advantages** ### **Compared to Other Grades:** - **vs. A2:** Better machinability, lower cost, easier heat treatment - **vs. D2:** Superior toughness, much better machinability, less distortion - **vs. S7:** Better wear resistance, easier to machine and grind - **vs. 4140/4340:** Significantly better wear resistance and hardness ### **Performance Characteristics:** - **Section Size Limit:** Full hardening to 75mm (3") diameter - **Dimensional Change:** Typically 0.05-0.10% during hardening - **Service Temperature:** Up to 200°C (400°F) continuously - **Polishing:** Can achieve excellent surface finishes (Ra < 0.1μm) --- ## **7. Availability** ### **Standard Forms:** - **Ground Flat Stock:** 1.5mm to 150mm thickness (1/16" to 6") - **Round Bars:** 3mm to 300mm diameter (1/8" to 12") - **Square Bars:** 3mm to 150mm (1/8" to 6") - **Plate:** Up to 300mm thick, various widths - **Custom Shapes:** Forgings, blocks, rings ### **Surface Conditions:** - **Precision Ground:** ±0.05mm tolerance - **Hot Rolled:** Black surface - **Rough Turned:** For machining stock - **Stress Relieved:** Ready for final machining ### **Special Processing:** - **Thermal Refinement:** For improved dimensional stability - **Surface Treatments:** Nitriding, chrome plating, PVD coating - **Certification:** Mill test reports, material traceability --- ## **8. Economic Considerations** ### **Cost Factors:** - **Material Cost:** Lower than most air-hardening grades - **Machining Cost:** Reduced due to excellent machinability - **Heat Treatment Cost:** Lower energy requirements vs. high-temperature grades - **Tool Life:** Competitive for moderate production runs - **Total Cost of Ownership:** Often lowest for general-purpose tooling ### **Life Expectancy:** - **Cutting Tools:** 2-3 times longer than water-hardening steels - **Forming Tools:** 50-100% longer than medium-carbon steels - **Wear Parts:** 3-5 times longer than low-alloy steels --- **Technical Summary:** Latrobe LSS™ O1 represents the **quintessential general-purpose tool steel** – versatile, reliable, and cost-effective. Its balanced properties make it suitable for approximately 70% of all cold work tooling applications. While specialized grades may excel in specific areas (wear resistance, toughness, or hot hardness), O1 provides the best overall combination of properties for the majority of toolroom and production applications. The grade's excellent machinability, predictable heat treatment response, and proven performance have made it the first choice for toolmakers for over a century. **Special Note:** For applications requiring maximum precision, O1 can be supplied in thermally refined condition to ensure exceptional dimensional stability during and after heat treatment. **Disclaimer:** The information provided is based on typical industry data. For critical applications, always consult Latrobe Specialty Steel's official technical data sheets and conduct appropriate testing under actual service conditions. Proper heat treatment by qualified personnel is essential for achieving optimal performance. -:- For detailed product information, please contact sales. -: Latrobe LSS™ O1 Tool Steel (ASTM O1) Specification Dimensions Size： Diameter 20-1000 mm Length <7200 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. -: Latrobe LSS™ O1 Tool Steel (ASTM O1) Properties -:- For detailed product information, please contact sales. -:

Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1) Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Latrobe LSS™ O1 Tool Steel Powder (ASTM O1) -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Latrobe LSS™ O1 Tool Steel Spherical Powder (ASTM O1) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ O1 Tool Steel Spherical Powder (ASTM O1) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ O1 Tool Steel Spherical Powder (ASTM O1) -:- 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 Spherical Powder 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 3671 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