Spherical Latrobe LSS™ S1 Shock-Resisting Tool Steel Powder (ASTM S1)

Latrobe LSS™ S1 Shock-Resisting Tool Steel Spherical Powder (ASTM S1) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ S1 Shock-Resisting Tool Steel Spherical Powder (ASTM S1) Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ S1 Shock-Resisting Tool Steel Powder (ASTM S1) characteristics -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ S1 Shock-Resisting Tool Steel Powder (ASTM S1) 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™ S1 Shock-Resisting Tool Steel Powder (ASTM S1) 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™ S1 Shock-Resisting Tool Steel Powder (ASTM S1) Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Latrobe LSS™ S1 Shock-Resisting Tool Steel (ASTM S1) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Latrobe LSS™ S1 Shock-Resisting Tool Steel (ASTM A681)** **Latrobe LSS™ S1** is a premium-grade, **oil-hardening, tungsten-chromium shock-resisting tool steel** specifically engineered to deliver exceptional impact resistance and toughness under severe service conditions. Classified under ASTM A681 Grade S1, this specialized steel combines high hardness capabilities with remarkable shock absorption characteristics, making it the material of choice for applications subjected to repeated impact loading, heavy shock, and high stress concentrations. Unlike standard cold work steels that prioritize wear resistance, S1 is optimized for applications where tools must withstand violent impacts without chipping, cracking, or catastrophic failure. The defining advantage of LSS™ S1 lies in its unique ability to **maintain high hardness (typically 54-58 HRC) while providing outstanding toughness** – a combination rarely achieved in conventional tool steels. Its balanced tungsten-chromium alloy system provides excellent resistance to deformation under impact while maintaining adequate wear resistance for many demanding applications. --- ## **1. Chemical Composition** Latrobe LSS™ S1 features a specialized composition optimized for shock resistance: | Element | Content (%) | Function | | :--- | :--- | :--- | | Carbon (C) | 0.40 - 0.55 | Balances hardness and toughness | | Tungsten (W) | 1.50 - 3.00 | Provides hot hardness and wear resistance | | Chromium (Cr) | 1.00 - 1.80 | Enhances hardenability and toughness | | Silicon (Si) | 0.15 - 0.35 | Increases strength and oxidation resistance | | Manganese (Mn) | 0.10 - 0.40 | Improves hardenability and strength | | Vanadium (V) | 0.15 - 0.30 | Refines grain, enhances toughness | | **Balance** | Iron (Fe) | | *(Composition conforms to ASTM A681 Grade S1 specifications)* --- ## **2. Physical & Mechanical Properties** ### **Annealed Condition Properties:** - **Hardness:** 179 - 217 HB (Brinell) - **Machinability:** Good (rated 55% of 1% carbon steel standard) - **Density:** 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity:** 205 GPa (29.7 × 10⁶ psi) - **Thermal Conductivity:** 38.5 W/m·K at 20°C - **Coefficient of Thermal Expansion:** 11.2 × 10⁻⁶/°C (20-100°C) ### **Heat Treatment Characteristics:** - **Hardening Method:** Oil quenching (primary), can be water quenched for maximum hardness - **Austenitizing Temperature:** 900°C - 955°C (1650°F - 1750°F) - **Preheating:** 650°C (1200°F) and 815°C (1500°F) recommended - **Quenching Options:** Fast oil or warm water (for maximum hardness) - **Tempering Range:** 175°C - 595°C (350°F - 1105°F) ### **Hardened & Tempered Properties:** - **Typical Hardness Range:** **54 - 58 HRC** (Optimal toughness range: 54-56 HRC) - **Transverse Rupture Strength:** 3,800 - 4,500 MPa - **Compressive Strength:** 2,000 - 2,400 MPa - **Charpy Impact Value (unnotched):** 70 - 100 J (at 54-56 HRC) - **Fatigue Strength:** 1,000 - 1,200 MPa (rotating bending, 10⁷ cycles) - **Key Characteristics:** - **Exceptional Impact Resistance:** 2-3 times greater than O1 at same hardness - **Good Hot Hardness:** Maintains hardness up to 425°C (800°F) - **Deep Hardening:** Full hardness to 75mm (3") diameter in oil - **Moderate Wear Resistance:** Better than S7, less than D2 --- ## **3. International Standards & Cross-Reference** | Country/Region | Standard | Designation | | :--- | :--- | :--- | | **United States** | ASTM A681 | Grade S1 | | | AISI | S1 | | | UNS | T41901 | | **Germany** | DIN 17350 | 1.2542 | | | Werkstoff Nr. | 1.2542 | | **Japan** | JIS G4404 | SKD6 | | **United Kingdom** | BS 4659 | BS1 | | **Sweden** | SS 14 2720 | 2720 | | **France** | AFNOR | 45WCrV8 | | **International** | ISO 4957 | 55WCrV8 | --- ## **4. Product Applications** ### **Primary Shock Applications:** - **Chipping and Cutting Hammers:** For masonry, concrete, and demolition - **Pneumatic Tool Components:** Chisels, moil points, clay spades - **Hot Work Tools:** Hot stamps, hot punches, hot forming tools - **Shear Blades:** For heavy bar and structural steel cutting - **Bolt Clippers and Cable Cutters:** Requiring high impact resistance ### **Specialized Tooling:** - **Cold Heading Dies and Punches:** For high-impact forming operations - **Hot Forging Tools:** Dies, inserts, and wear parts - **Rock Drilling Bits and Mining Tools:** Subjected to extreme impact - **Woodworking Tools:** Axes, adzes, splitting wedges - **Knives for Tough Materials:** Cutting fibrous or heterogeneous materials ### **Industrial Applications:** - **Crusher Parts and Breaker Bars:** In mining and aggregate processing - **Railroad Tools:** Spike mauls, track tools - **Construction Tools:** Paving breakers, rock drills - **Agricultural Tools:** Heavy-duty cutting and digging implements --- ## **5. Processing Guidelines** ### **Machining (Annealed State):** - **Turning Speed:** 25-35 m/min (80-115 ft/min) - **Drilling Speed:** 12-20 m/min (40-65 ft/min) - **Milling Speed:** 18-28 m/min (60-90 ft/min) - **Tool Material:** Premium high-speed steel or carbide recommended - **Chip Control:** Produces continuous chips - use chip breakers ### **Heat Treatment Procedure:** 1. **Preheating:** 650°C (1200°F) then 815°C (1500°F) for 30 min/inch 2. **Austenitizing:** 925°C (1700°F) for 20-30 minutes per inch 3. **Quenching:** Agitated oil at 40-60°C (100-140°F) for toughness *Alternative:* Water quench for maximum hardness (higher risk of distortion) 4. **Tempering:** Immediately after quenching - For maximum toughness (54-56 HRC): 315-425°C (600-800°F) for 2+2 hours - For higher hardness (56-58 HRC): 205-260°C (400-500°F) for 2+2 hours ### **Special Heat Treatment Notes:** - **Water Quenching:** Only for simple shapes, requires immediate tempering - **Deep Freezing:** Not typically required - **Multiple Tempering:** Recommended for maximum toughness - **Surface Hardening:** Can be flame or induction hardened for specific applications ### **Grinding:** - **Wheel Selection:** Aluminum oxide, medium hardness (I-K grade) - **Wheel Speed:** 25-28 m/s (5000-5500 SFPM) - **Coolant:** Essential to prevent overheating and tempering back - **Technique:** Use light passes with good wheel maintenance --- ## **6. Performance Comparison** ### **vs. S7 (Air-Hardening Shock Steel):** - **S1:** Better hot hardness, higher maximum hardness capability - **S7:** Better dimensional stability, deeper hardening, slightly higher toughness - **Cost:** S1 typically more economical ### **vs. L6 (Oil-Hardening Tough Steel):** - **S1:** Better hot hardness, higher wear resistance - **L6:** Higher toughness at lower hardness levels, better machinability - **Applications:** S1 for hot work, L6 for cold impact ### **vs. H13 (Hot Work Steel):** - **S1:** Better impact resistance at room temperature - **H13:** Superior hot hardness and thermal fatigue resistance - **Temperature:** S1 for <425°C (800°F), H13 for higher temperatures --- ## **7. Technical Advantages** ### **Unique Properties:** 1. **Impact Resistance:** Exceptional ability to withstand repeated heavy blows 2. **Hot Hardness:** Maintains hardness at elevated temperatures (up to 425°C/800°F) 3. **Fatigue Resistance:** Good resistance to failure under cyclic loading 4. **Versatility:** Can be oil or water quenched depending on application needs ### **Economic Benefits:** - **Tool Life:** 3-5 times longer than carbon tool steels in impact applications - **Downtime Reduction:** Less frequent tool changes in demanding applications - **Safety:** Reduced risk of catastrophic failure in high-impact tools - **Versatility:** One material for both hot and cold impact applications --- ## **8. Special Applications & Considerations** ### **Hot Work Applications (up to 425°C/800°F):** - **Hot Stamping and Forging:** Excellent for non-ferrous metals - **Hot Cutting Tools:** Maintains edge at elevated temperatures - **Hot Forming Dies:** Resists heat checking better than standard tool steels ### **Safety-Critical Applications:** - **Demolition Tools:** Reduced risk of breaking and flying fragments - **Mining Tools:** Withstands unpredictable impact loading - **Construction Tools:** Reliable performance in uncontrolled conditions ### **Design Considerations:** - **Section Size:** Full hardening in oil to 75mm (3") diameter - **Design:** Avoid sharp corners and sudden section changes - **Support:** Proper tool support extends service life - **Maintenance:** Regular inspection for cracks and wear --- ## **9. Availability & Specifications** ### **Standard Forms:** - **Round Bars:** 10mm to 300mm diameter (0.375" to 12") - **Flat Stock:** 6mm to 150mm thickness (0.25" to 6") - **Square Bars:** 10mm to 150mm (0.375" to 6") - **Forged Blocks:** Custom sizes for tooling applications - **Plate:** Up to 300mm thick ### **Quality Standards:** - **Microcleanliness:** Controlled inclusion content - **Homogeneity:** Uniform structure throughout cross-section - **Decarburization:** Controlled to specified limits - **Straightness:** Meets industry standards for tool steel ### **Certifications:** - Mill test reports with chemical analysis - Hardness certification - Ultrasonic testing available (for critical applications) - Full traceability to heat number --- ## **10. Maintenance & Service Life Extension** ### **Preventive Maintenance:** - **Regular Inspection:** Check for cracks, chips, and excessive wear - **Proper Sharpening:** Maintain correct edge geometry - **Correct Storage:** Protect from corrosion and mechanical damage - **Usage Records:** Track service hours and impacts ### **Reconditioning:** - **Welding:** Possible with proper preheat (315°C/600°F) and post-heat - **Rehardening:** Can be re-heat treated if not overheaten in service - **Surface Treatment:** Nitriding or coating can extend wear life ### **Failure Analysis:** - **Common Failure Modes:** Edge chipping, thermal cracking, abrasive wear - **Prevention:** Proper hardness selection, design optimization, correct application - **Investigation:** Metallurgical analysis available for problem solving --- **Technical Summary:** Latrobe LSS™ S1 represents a **specialized solution for extreme impact applications** where conventional tool steels would fail prematurely. Its unique combination of tungsten and chromium provides an optimal balance of hardness, toughness, and hot hardness that is unmatched by standard oil-hardening grades. While not as wear-resistant as D-series steels or as tough as some nickel-based grades, S1 occupies a critical niche for tools that must withstand both impact and moderate wear at elevated temperatures. The grade's versatility in heat treatment (oil or water quenching) allows toolmakers to tailor properties to specific application requirements. **Historical Significance:** S1 has been a mainstay in the tool steel industry for decades, particularly in applications involving hot work and heavy impact. Its reliable performance in demanding conditions has made it the standard for many industrial and construction tools. **Safety Note:** For impact tools, proper heat treatment and regular inspection are critical for safety. Always follow manufacturer recommendations and industry safety standards. **Disclaimer:** Performance data represents typical values. For safety-critical applications, conduct thorough testing under actual service conditions. Always consult Latrobe's current technical data and processing recommendations for your specific application requirements. -:- For detailed product information, please contact sales. -: Latrobe LSS™ S1 Shock-Resisting Tool Steel (ASTM S1) Specification Dimensions Size： Diameter 20-1000 mm Length <7202 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™ S1 Shock-Resisting Tool Steel (ASTM S1) Properties -:- For detailed product information, please contact sales. -:

Spherical Latrobe LSS™ S1 Shock-Resisting Tool Steel Powder (ASTM S1) Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Latrobe LSS™ S1 Shock-Resisting Tool Steel Powder (ASTM S1) -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Latrobe LSS™ S1 Shock-Resisting Tool Steel Spherical Powder (ASTM S1) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ S1 Shock-Resisting Tool Steel Spherical Powder (ASTM S1) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ S1 Shock-Resisting Tool Steel Spherical Powder (ASTM S1) -:- 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 3673 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