AISI E9310H Steel, direct quenched from pot

AISI E9310H 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 E9310H 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 E9310H 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 Datasheet: AISI E9310H Steel (Case Hardened & Direct Quenched)** **Product Description:** AISI E9310H is a premium, case-hardening, nickel-chromium-molybdenum alloy steel. This specific product has undergone a precise **low-pressure carburizing (LPC)** or **atmosphere carburizing** process, followed by **direct quenching from the carburizing pot (also known as “Hot Quenching” or “Direct Hardening”)**, and a final low-temperature temper at 150°C (300°F). This sequence yields a component with an exceptionally hard, wear-resistant surface, a defined effective case depth of 0.99 mm (0.039 in), and a strong, tough core. The “H” designation indicates it is supplied to specific hardenability band requirements. **Key Features:** * **Superior Case Properties:** High surface hardness (typically >60 HRC) for exceptional wear and pitting resistance. * **Controlled Hardenability:** “H”-steel ensures consistent through-hardening response, critical for predictable core properties. * **Deep, Uniform Case:** Achieves a precise 0.99 mm effective case depth, ideal for high-load applications. * **Direct Quench Benefits:** Minimizes distortion and intergranular oxidation compared to traditional reheat quenching, improving dimensional stability and fatigue performance. * **High Core Toughness:** Nickel content ensures excellent core strength and fracture toughness under heavy bending and contact loads. --- ### **1. Chemical Composition (Standard, Weight %)** The composition adheres to AISI/SAE limits, with tighter controls for hardenability. | Element | Content (%) | Note | | :--- | :---: | :--- | | **Iron (Fe)** | Balance | | | **Carbon (C)** | 0.08 - 0.13 | Low carbon for effective case enrichment. | | **Manganese (Mn)**| 0.45 - 0.65 | | | **Nickel (Ni)** | 3.00 - 3.50 | Primary contributor to core toughness and hardenability. | | **Chromium (Cr)** | 1.00 - 1.40 | Forms hard carbides, enhances hardenability and wear resistance. | | **Molybdenum (Mo)** | 0.08 - 0.15 | Refines grain, improves hardenability and temper resistance. | | **Silicon (Si)** | 0.15 - 0.30 | | | **Phosphorus (P)** | ≤ 0.025 | | | **Sulfur (S)** | ≤ 0.025 | | **Note:** Actual ladle analysis is provided and certified to meet **hardenability band requirements** (per SAE J1268). --- ### **2. Physical & Mechanical Properties (After Processing)** * **Surface Hardness:** **62 - 66 HRC** (after tempering). Achieved through high-carbon martensite in the case. * **Core Hardness:** **38 - 45 HRC** (dependent on part section size). Derived from medium-carbon, low-alloy martensite. * **Effective Case Depth (ECD):** **0.99 mm (0.039 in)** at 550 HV (51.3 HRC). Defined per ISO 2639 or ASTM E1019. * **Core Tensile Strength:** ~ 1240 - 1450 MPa (180 - 210 ksi) * **Core Yield Strength:** ~ 1035 MPa (150 ksi) min * **Case Microstructure:** Fine, tempered martensite with a minimal amount of retained austenite (typically <15%), and no detrimental carbide networks. * **Distortion:** Minimal, due to the direct quench process from a uniform, single heat. --- ### **3. Heat Treatment Specification** This product is supplied as a **finished heat-treated component**, processed as follows: 1. **Carburizing:** Gas or Low-Pressure Carburizing to achieve a high surface carbon potential (~0.75-0.85% C) and a **total carburized depth** sufficient to yield the specified **0.99 mm effective depth** after quenching. 2. **Quenching:** **Direct Quench from Pot.** The component is quenched directly from the carburizing temperature into oil, under controlled agitation. 3. **Tempering:** **150°C (300°F)** for 2-4 hours to relieve internal stresses without significantly reducing hardness, thereby optimizing the balance of hardness and toughness. --- ### **4. Product Applications** This material and process combination is specified for the most demanding, high-reliability **aerospace and power transmission components**, where fatigue life, wear resistance, and dimensional precision are critical: * **Aircraft Engine Gears:** Critical planetary and sun gears, spiral bevel gears in main engine gearboxes and accessory drives. * **Helicopter Transmission Gears:** Mainshaft gears, tail rotor drive gears, and other highly loaded transmission components. * **High-Performance Racing & Defense Vehicle Gears:** Gearbox and differential gears subject to extreme shock loads. * **Critical Bearing Components:** Aerospace bearing races and rolling elements requiring high contact fatigue strength. * **Heavily Loaded Splined Shafts & Pins.** --- ### **5. International & Industry Standards** This product conforms to or is processed in accordance with the following standards: * **Material Standard:** **AMS 6260H** (Steel Bars, Forgings, and Tubing, 0.08C - 0.13C (9310H)). This is the primary controlling aerospace specification for the raw material's chemistry and hardenability. * **Hardenability Standard:** **SAE J1268** (Hardenability Bands for Carburizing Steels). * **Heat Treatment Standard:** **AMS 2759/7** (Carburizing and Direct Hardening of Steel Parts) often governs the thermal process controls. * **Case Depth Measurement:** **ISO 2639** or **ASTM E1019** (Standard Practice for Determination of Case Depth in Ferrous Powders). * **General Equivalent Standards:** * **SAE:** 9310H * **UNS:** G93106 * **EN (European):** 1.6657 (Approximate) * **DIN (German):** 1.6651 (Approximate) --- ### **6. Key Advantages of This Specific Processing Route** * **Direct Quenching:** Eliminates the need for a separate reheat cycle, reducing energy use, potential for decarburization, and **minimizing part distortion**. * **Precise Case Control:** The 0.99 mm case depth is optimized for components experiencing high hertzian contact stresses, providing optimal support for the hardened surface. * **Consistent Quality:** The “H”-steel designation and controlled atmosphere processing ensure batch-to-batch repeatability in core strength and case properties. * **Superior Fatigue Performance:** The combination of a clean, oxidation-free case (from LPC), high surface hardness, and a tough nickel-alloyed core results in outstanding bending fatigue and contact fatigue (pitting) resistance. **Conclusion:** AISI E9310H, processed via direct quenching to achieve a 0.99 mm case depth and tempered at 150°C, represents the pinnacle of case-hardened gear and bearing steel technology. It is the material-of-choice for engineers designing mission-critical, high-stress components where performance, reliability, and safety cannot be compromised. -:- For detailed product information, please contact sales. -: AISI E9310H Steel, direct quenched from pot, tempered at 150°C (300°F), 0.99 mm case depth Specification Dimensions Size： Diameter 20-1000 mm Length <5763 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 E9310H 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 E9310H 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 E9310H 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 E9310H 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 2234 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