AISI E9310 Steel, direct quenched from pot

AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth Product Information -:- For detailed product information, please contact sales. -: AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth Synonyms -:- For detailed product information, please contact sales. -:

AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI E9310 Steel, Direct Quenched from Pot, Tempered at 150°C (300°F), 0.99 mm Case Depth** #### **1. Overview** AISI E9310 is a premium **high-nickel-chromium-molybdenum (Ni-Cr-Mo) aircraft-quality alloy steel**, specifically developed for the most demanding case-hardening applications in aerospace and high-performance industries. This specification defines the material in its final processed state through an **integrated high-efficiency carburizing cycle**: components are carburized to achieve a **precise 0.99 mm (0.039 inch) effective case depth**, **directly quenched from the carburizing pot**, and **tempered at 150°C (300°F)**. This process yields components with an **exceptionally hard, wear-resistant case** (typically 60-64 HRC) over a **tough, high-strength core** (typically 36-42 HRC). The combination of E9310's superior alloy content and this controlled thermal process makes it the material of choice for critical, heavily loaded gearing and bearing applications where reliability, fatigue resistance, and dimensional precision are paramount. #### **2. International Standards & Designations** This premium material and process combination is governed by 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) | | **Aerospace Material** | **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 features a high nickel content for exceptional core toughness, with controlled carburizing 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 superior core toughness; surface enriched to ~0.85-1.00% during carburizing. | | **Manganese (Mn)** | 0.45 - 0.65 | Balanced for hardenability without compromising forgeability. | | **Phosphorus (P)** | ≤ 0.015 | Ultra-low for aircraft quality. | | **Sulfur (S)** | ≤ 0.015 | Ultra-low for improved transverse properties. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer. | | **Nickel (Ni)** | **3.00 - 3.50** | **Key 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:** **0.99 mm** to 50 HRC (550 HV) per **AMS 2759/4**. This precise depth is optimized for high-contact-stress applications. * **Surface Carbon:** ~0.85-1.00%. * **Carbon Gradient:** Precisely controlled to provide optimal support for the hard case. #### **4. Mechanical & Physical Properties (Final Condition)** Direct quenching from carburizing temperature followed by a 150°C temper produces the definitive high-performance property gradient. **Final Component Properties:** * **Surface (Case) Properties:** * **Hardness:** **60 - 64 HRC** (Rockwell C) * **Case Depth:** **0.99 mm** effective depth (to 50 HRC). * **Compressive Residual Stress:** Very high (>500 MPa), excellent for contact fatigue resistance. * **Retained Austenite:** Typically 15-25%, stabilized by high nickel and direct quench. * **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) – **Exceptionally high for this strength level.** **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 mandated for the most critical, high-stress aerospace and power transmission components. * **Aerospace Gearing:** Helicopter main transmission gears, planetary gear sets, accessory drive gears, and actuator system gears. * **Critical Aircraft Components:** Splined shafts, bearing races, and high-load fasteners in landing gear and flight control systems. * **High-Performance Racing Transmissions:** Gears and shafts in Formula 1, IndyCar, and top-fuel dragster transmissions. * **Advanced Power Tools:** High-torque drive gears in industrial impact wrenches and drills. * **Defense Applications:** Gearing in tracked vehicle transmissions, turret drives, and missile guidance 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 (0.99 mm):** This specific depth provides an ideal balance between surface durability and resistance to case crushing, optimized for medium-to-high contact stress applications. * **Superior Fatigue Performance:** The combination of a very hard case, a tough core, and high compressive residual stresses yields exceptional bending and contact (pitting) fatigue life. * **Production Efficiency:** Direct quenching from the pot is a cost-effective and consistent method for high-volume production of critical parts. * **Aerospace Certification:** The material and process are fully traceable and compliant with rigorous aerospace standards (AMS), ensuring utmost reliability. **Process Considerations:** * **Distortion Control:** Direct quenching can induce distortion; precision components often require subsequent grinding or honing. * **Retained Austenite Management:** The high nickel and direct quench process can result in significant retained austenite (15-25%), which is generally acceptable and can improve contact fatigue resistance but may require sub-zero treatment for maximum dimensional stability. * **Tempering Requirement:** The **150°C (300°F) temper is essential** to relieve quenching stresses and slightly temper the martensite, improving toughness without significantly reducing hardness. **Conclusion:** **AISI E9310 steel, processed via direct pot quenching and tempered at 150°C to a precise 0.99 mm case depth, represents the gold standard for high-performance case-hardened components in aerospace and extreme-duty applications.** Its defining characteristic is the **unparalleled combination of extreme surface hardness and exceptional core toughness**, a direct result of its high-nickel alloy design. The specified 0.99 mm case depth is engineered to withstand severe hertzian contact stresses while being supported by one of the toughest cores available in commercial case-hardening steels. This material and process specification is not merely a manufacturing step but a **reliability engineering solution** for applications where component failure is not an option. For engineers designing critical power transmission systems that operate at the limits of performance, AISI E9310 in this condition provides the proven, certified performance needed to achieve maximum power density, longevity, and safety. -:- For detailed product information, please contact sales. -: AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth Specification Dimensions Size： Diameter 20-1000 mm Length <5751 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, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth Properties -:- For detailed product information, please contact sales. -:

Applications of AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth -:- For detailed product information, please contact sales. -:

Packing of AISI E9310 Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 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 2222 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