AISI E9310 Steel, single quenched

AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth Product Information -:- For detailed product information, please contact sales. -: AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth Synonyms -:- For detailed product information, please contact sales. -:

AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI E9310 Steel, Single Quenched and Tempered at 150°C (300°F), 1.2 mm Case Depth** #### **1. Overview** AISI E9310 is a premium **high-nickel-chromium-molybdenum (Ni-Cr-Mo) aircraft-quality alloy steel**, engineered for the most demanding case-hardened applications. This specification defines the material processed through a **precise thermal cycle** to achieve an optimized final state: components are carburized to a **1.2 mm (0.047 inch) effective case depth**, subjected to a **single quench from the austenitizing temperature**, and **tempered at 150°C (300°F)**. This controlled process produces components with an **extremely hard, wear-resistant surface** (typically 60-64 HRC) supported by a **notably tough, high-strength core** (typically 36-42 HRC). The combination of E9310's superior alloy content (notably high nickel) and this specific heat treatment makes it the benchmark for critical, high-load gearing and bearing applications where fatigue life, impact resistance, and dimensional control are paramount. #### **2. International Standards & Designations** This material and process combination conforms to the most stringent aerospace and quality standards. | Region/System | Standard Designation | Title / Purpose | | :--- | :--- | :--- | | **USA (AISI/SAE)** | **AISI E9310, SAE J404** | Chemical Composition (Aircraft Quality) | | **Aerospace Material** | **AMS 6260** | Steel Bars, Forgings, and Tubing 1.8Ni-0.80Cr-0.25Mo (0.10-0.15C) (9310) | | **Vacuum Melted** | **AMS 6265** | Steel Bars, Forgings, and Tubing 1.8Ni-0.80Cr-0.25Mo (0.10-0.15C) (9310) Vacuum Melted | | **Heat Treatment** | **AMS 2759/3** | Carburizing and Carbonitriding of Steel | | **Case Depth** | **AMS 2759/4** | Determination of Case Depth | | **Heat Treatment** | **AMS-H-6875** | Heat Treatment of Steel | | **UNS Number** | **G93106** | Unified Numbering System | | **Aerospace Quality** | **AMS 2300** | Premium Aircraft-Quality Steel Cleanliness | | **Europe** | **1.6657 / 14NiCrMo13-4** | Close Equivalent | #### **3. Chemical Composition & Case Profile** E9310 is distinguished by its high nickel content for exceptional core toughness. The carburizing process enriches the surface to achieve the specified case depth. **Core Composition (% by Weight, AISI E9310):** | Element | Content Range | Metallurgical Significance | | :--- | :--- | :--- | | **Carbon (C)** | 0.08 - 0.13 | Low core carbon ensures maximum core toughness; surface enriched to ~0.85-1.00% during carburizing. | | **Manganese (Mn)** | 0.45 - 0.65 | Contributes to hardenability. | | **Phosphorus (P)** | ≤ 0.015 | Ultra-low for superior ductility and impact resistance. | | **Sulfur (S)** | ≤ 0.015 | Ultra-low to maximize transverse properties. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer. | | **Nickel (Ni)** | **3.00 - 3.50** | **Critical Element:** Provides exceptional core toughness, impact resistance, and hardenability. | | **Chromium (Cr)** | 1.00 - 1.45 | Enhances case hardenability and wear resistance. | | **Molybdenum (Mo)** | 0.08 - 0.15 | Improves hardenability and tempering resistance. | **Specified Case Profile:** * **Effective Case Depth:** **1.2 mm** to 50 HRC (550 HV) per **AMS 2759/4**. This depth is optimized for applications with high bending and contact stresses. * **Surface Carbon:** ~0.85-1.00%. * **Case Carbon Gradient:** Precisely controlled to provide optimal support against subsurface shear stresses. #### **4. Mechanical & Physical Properties (Final Condition)** Single quenching and tempering at 150°C produces a high-performance gradient structure with excellent consistency. **Final Component Properties:** * **Surface (Case) Properties:** * **Hardness:** **60 - 64 HRC** (Rockwell C) * **Case Depth:** **1.2 mm** effective depth (to 50 HRC). * **Compressive Residual Stress:** Very high (>500 MPa), critical for resistance to pitting and bending fatigue. * **Retained Austenite:** Typically 15-25%, which can be beneficial for contact fatigue. * **Core Properties:** * **Hardness:** **36 - 42 HRC** * **Ultimate Tensile Strength:** **1150 - 1350 MPa** (167 - 196 ksi) * **Yield Strength (0.2% Offset):** **950 - 1150 MPa** (138 - 167 ksi) * **Elongation:** **≥ 12%** * **Reduction of Area:** **≥ 50%** * **Charpy Impact Toughness (Room Temp):** **≥ 55 J** (41 ft-lbf) – **Exceptional for this strength level.** * **Fatigue Performance:** * **Bending Fatigue Limit:** **650 - 800 MPa** (94 - 116 ksi) * **Contact Fatigue Life:** Exceptional, due to deep case and tough core. **Physical Properties (Core):** * Density: 7.85 g/cm³ * Modulus of Elasticity: 205 GPa * Thermal Conductivity: ~42 W/m·K #### **5. Product Applications** This specific processed condition of E9310 is essential for the most critical, high-stress aerospace, defense, and high-performance applications. * **Aerospace Gearing:** Helicopter main and tail rotor transmission gears, planetary gear sets, accessory drive gears. * **Critical Aircraft Components:** High-load splined shafts, bearing races in turbine engines, and critical fasteners. * **High-Performance Racing Transmissions:** Gears and pinions in Formula 1, IndyCar, and Le Mans prototype transmissions. * **Advanced Industrial Gearboxes:** Critical gears in high-speed compressors, pumps, and test stands. * **Defense Applications:** Gearing in main battle tank transmissions, turret drives, and naval propulsion systems. #### **6. Key Characteristics & Advantages** * **Exceptional Core Toughness:** The **high nickel content (3.00-3.50%)** provides unmatched impact and fracture toughness for a case-hardening steel, preventing catastrophic failure under shock loads. * **Optimized Case Depth (1.2 mm):** This specific, deeper case provides enhanced resistance to bending fatigue and case crushing, ideal for components with high root bending stresses or larger module gears. * **Superior Fatigue Performance:** The combination of a deep, hard case, a phenomenally tough core, and high compressive residual stresses yields exceptional bending and contact (pitting) fatigue life. * **Good Dimensional Control:** Single quenching (often from a temperature slightly below the carburizing temperature) can offer better control over distortion compared to direct pot quenching, reducing final grinding stock. * **Aerospace Certification:** The material and process are fully traceable and compliant with rigorous aerospace standards (AMS), ensuring utmost reliability and consistency. **Process Considerations:** * **Quench Process:** Typically oil quenched from ~830-850°C after carburizing at ~925°C. This refined austenitizing temperature helps control grain size and distortion. * **Retained Austenite:** The high nickel content can result in significant retained austenite (15-25%). This is generally acceptable and can improve contact fatigue resistance but may require sub-zero treatment for maximum dimensional stability in precision components. * **Tempering Requirement:** The **150°C (300°F) temper is critical** to relieve quenching stresses, slightly improve toughness, and stabilize the microstructure without a significant reduction in surface hardness. * **Distortion Management:** While better than direct quench, distortion must still be managed through proper fixturing and process control. **Conclusion:** **AISI E9310 steel, processed via single quenching and tempering at 150°C to a precise 1.2 mm case depth, represents the pinnacle of case-hardening technology for extreme-duty applications.** Its defining characteristic is the **unparalleled synergy of extreme surface hardness and exceptional core toughness**, a direct result of its high-nickel alloy design. The specified 1.2 mm case depth is engineered to withstand severe hertzian contact and high root bending stresses, providing a robust safety margin in the most demanding operating environments. This material and process specification is a **reliability engineering solution** for applications where performance, longevity, and absolute safety are non-negotiable. For engineers designing critical power transmission systems at the forefront of technology, AISI E9310 in this condition provides the certified performance and proven pedigree needed to achieve maximum power density and operational reliability. -:- For detailed product information, please contact sales. -: AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth Specification Dimensions Size： Diameter 20-1000 mm Length <5752 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. -: AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth Properties -:- For detailed product information, please contact sales. -:

Applications of AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth -:- For detailed product information, please contact sales. -:

Packing of AISI E9310 Steel, single quenched and tempered at 150°C (300°F), 1.2 mm case depth -:- 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 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 2223 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