Latrobe,LSS™ O1 Tool Steel Capillary (ASTM O1)

Latrobe LSS™ O1 Tool Steel Capillary (ASTM O1) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ O1 Tool Steel Capillary (ASTM O1) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ O1 Tool Steel (ASTM O1) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ O1 Tool Steel (ASTM O1)** ## **Product Overview** Latrobe LSS™ O1 is a premium-grade, **oil-hardening**, non-shrinking cold work tool steel that serves as a fundamental and highly versatile alloy in the toolmaking industry. Conforming to the ASTM O1 specification, it offers an outstanding balance of **good machinability, excellent dimensional stability during heat treatment, and reliable wear resistance**. Known for its predictable behavior and ease of use, O1 is the benchmark "go-to" steel for a vast array of general-purpose tooling, jigs, fixtures, and gauges where precision, reliability, and cost-effectiveness are paramount. ## **Key Features & Benefits** * **Excellent Dimensional Stability:** As a non-shrinking (or low-distortion) oil-hardening steel, O1 exhibits minimal and predictable size change during quenching, making it ideal for precision tools and complex dies that must maintain tight tolerances. * **Superior Machinability:** Offers excellent machinability in the annealed state, among the best of all tool steels, allowing for easy fabrication of intricate shapes and reducing production time and tool wear. * **Good Wear Resistance:** Provides adequate wear resistance for a wide range of applications, balancing service life with ease of sharpening and maintenance. * **Ease of Heat Treatment:** Relatively simple and forgiving heat treatment process (oil quenching) compared to air-hardening grades, accessible to most tool rooms with standard equipment. * **Cost-Effective Performance:** Provides a reliable and economical solution for a majority of tooling applications that do not require the extreme wear resistance or hot hardness of more highly alloyed steels. ## **International Standard & Designations** * **Primary Standard:** **ASTM A681-08 (R2019):** Standard Specification for Tool Steel Alloy. * **Grade:** **O1** * **Manufacturer's Designation:** **Latrobe LSS™ O1** * **Unified Numbering System (UNS):** **T31501** * **Common International Equivalents:** * **ISO:** **100MnCrW4** / **~95MnWCr5** * **Germany (DIN/W-Nr.):** **1.2510 / 100MnCrW4** * **Japan (JIS):** **SKS3** * **Sweden (SS):** **2140** ## **Chemical Composition (%, typical - ASTM O1)** | Carbon (C) | Manganese (Mn) | Chromium (Cr) | Tungsten (W) | Vanadium (V) | Silicon (Si) | Iron (Fe) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 0.85 - 1.00 | 1.00 - 1.40 | 0.40 - 0.60 | 0.40 - 0.60 | 0.15 - 0.30 | 0.15 - 0.40 | Balance | ## **Physical & Mechanical Properties (Typical)** | Property | Value / Description | | :--- | :--- | | **Density** | 7.86 g/cm³ (0.284 lb/in³) | | **Hardness (Annealed)** | 190-215 HB (Brinell) | | **Hardness (Heat Treated)** | **57 - 62 HRC** (Standard optimal working range) | | **Austenitizing Temperature** | 775 - 800°C (1425 - 1475°F) | | **Quenching Medium** | Oil (heated to 40-60°C / 100-140°F) | | **Tempering Temperature** | **150 - 315°C (300 - 600°F).** Commonly tempered at 175-205°C (350-400°F) to achieve maximum hardness (60-62 HRC) and stability. **Single temper is often sufficient.** | | **Dimensional Change on Hardening** | Minimal and predictable; slight growth is typical. | | **Toughness** | Moderate. Suitable for applications without severe impact. | | **Machinability** | **Excellent** (Approximately 90-100% of a 1% carbon steel benchmark). | ## **Product Applications** Latrobe LSS™ O1 is the quintessential general-purpose tool steel used across virtually every manufacturing sector. * **Jigs, Fixtures, and Gauges:** Master templates, drill jigs, inspection fixtures, and precision measuring tools. * **Blanking and Forming Dies:** For low to medium production runs on softer materials (brass, aluminum, mild steel, plastics). * **Machine Tool Components:** Arbors, collets, bushings, and wear plates. * **Cutting Tools:** Lathe tools, planer tools, taps, reamers, and knives for woodworking or plastic. * **Punches, Die Inserts, and Ejector Pins.** * **Stamping and Embossing Tools.** * **Hand Tools:** Wrenches, socket drivers, and specialized manual tools. ## **Processing & Heat Treatment Notes** * **Machining:** **Exceptional** machinability. Can be readily turned, milled, and drilled in the annealed condition. * **Heat Treatment:** Process is straightforward but requires control. Preheat to 650-700°C (1200-1300°F) is recommended for complex parts. Austenitize at the recommended **low temperature** in a salt bath, controlled atmosphere, or packed in cast iron chips to prevent decarburization. Quench in a circulating oil bath. **Temper immediately** after the part reaches hand-warm temperature (50-65°C / 120-150°F). Over-tempering (above 315°C / 600°F) will lead to a rapid loss of hardness. * **Grinding:** Grinds easily. Use standard practices. * **Surface Treatments:** Can be case-hardened (carburized) or nitrided to improve surface properties for specific applications. Black oxide coating is common for corrosion resistance and appearance. --- **Disclaimer** *This product description provides typical information for O1 tool steel. Latrobe LSS™ O1 is produced to consistent, high-quality standards. While its heat treatment is relatively simple, precise temperature control is still crucial for optimal results. Properties are influenced by section size and specific processing. For critical applications, always consult the latest official technical data sheets and processing guidelines from Latrobe Specialty Steel.* -:- For detailed product information, please contact sales. -: Latrobe LSS™ O1 Tool Steel (ASTM O1) Specification Dimensions Size： Diameter 20-1000 mm Length <5362 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. -:

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

Packing of Latrobe LSS™ O1 Tool Steel Capillary (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 Capillary 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 1833 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