AMS 5315D(94) Ductile Iron Wire

AMS 5315D(94) Ductile Iron Wire Product Information -:- For detailed product information, please contact sales. -: AMS 5315D(94) Ductile Iron Wire Synonyms -:- For detailed product information, please contact sales. -:

AMS 5315D(94) Ductile Iron Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AMS 5315D Investment Cast Ductile Iron** **AMS 5315D** is a highly controlled aerospace material specification (AMS) for **ductile iron (spheroidal graphite iron) castings produced by the investment casting (“lost wax”) process**. This standard defines a premium-grade material engineered for critical applications requiring an exceptional combination of high strength, good ductility, and excellent dimensional accuracy with complex geometries. The “D” revision (1994) is the current active version, emphasizing the stringent quality and performance requirements necessary for aerospace and other high-reliability industries. Investment casting allows for the production of near-net-shape components with superior surface finish and minimal machining allowance, making it ideal for complex parts. --- ### **1. Key International Standards & Designations** * **Primary Standard:** **AMS 5315D (1994) - Iron Castings, Ductile, 95-5-1-1, Investment Cast** * The “95-5-1-1” denotes the **minimum mechanical properties**: 95 ksi (655 MPa) Tensile Strength, 5% Elongation, 1% Yield Strength offset not typically specified, and 1? Not standard notation; see property table below. * **Common Names:** Investment Cast Ductile Iron, Nodular Iron. * **Related ASTM Standards:** * **ASTM A536:** Covers standard grades of ductile iron castings (e.g., 80-55-06, 100-70-03). AMS 5315 is a more restrictive, investment-cast specific version of a high-strength grade. * **ASTM A732:** Standard specification for investment castings of various ferrous and non-ferrous alloys. * **SAE Standard:** **AMS specifications are part of the SAE International aerospace standards system.** * **ISO Comparable:** **ISO 1083** defines grades of spheroidal graphite cast irons, with grades like JS/ISO 800-10 being somewhat comparable in performance. --- ### **2. Chemical Composition (Requirements per AMS 5315D)** The composition is tightly controlled to ensure the formation of spherical graphite (nodules) and achieve the required high-strength ferritic-pearlitic or pearlitic matrix. | Element | Requirements (% by Weight) | Purpose & Rationale | | :--- | :--- | :--- | | **Carbon (C)** | 3.40 - 4.00 | Ensures adequate graphitization. High carbon content is typical for cast irons. | | **Silicon (Si)** | 2.20 - 2.80 | Primary graphitizer and ferrite promoter. Controlled to balance strength and ductility. | | **Manganese (Mn)** | 0.20 - 0.40 (Max) | Low levels specified to minimize carbide formation and segregation, promoting toughness. | | **Phosphorus (P)** | 0.03 Max | Very low limit to prevent the formation of brittle phosphide networks. | | **Sulfur (S)** | 0.015 Max | Extremely low limit is critical. High sulfur inhibits nodularization (spheroidal graphite formation). | | **Magnesium (Mg)** | 0.03 - 0.06 | **The essential nodulizing element.** Must be present in this range to ensure graphite forms as spheres, not flakes. | | **Nickel (Ni)** | 0.80 - 1.20 | **Key alloying element.** Strengthens the matrix, refines pearlite, improves hardenability and uniformity. | | **Chromium (Cr)** | 0.06 Max (Reported) | Strictly limited due to its strong carbide-forming tendency, which reduces machinability and ductility. | | **Molybdenum (Mo)** | 0.40 - 0.60 | **Key alloying element.** Provides solid solution strengthening, increases high-temperature strength and creep resistance. | | **Copper (Cu)** | 0.75 - 1.05 | **Key alloying element.** Promotes pearlite formation, increases strength and corrosion resistance. | | **Tin (Sn)** | 0.02 - 0.04 | A powerful pearlite stabilizer, ensuring a consistent, strong matrix microstructure. | **Key Takeaway:** The Ni-Cu-Mo alloying system, combined with tight control of harmful elements (S, P, Cr), is designed to produce a high-strength, fine-grained, and thermally stable microstructure suitable for investment casting and demanding service. --- ### **3. Mechanical & Physical Properties** Properties are typically determined from separately cast test coupons that undergo the same heat treatment as the castings. **A. Mechanical Properties (Minimums, at room temperature):** * **Tensile Strength:** **100 ksi min (690 MPa min)** – Note: The grade “95-5-1-1” is a nominal designation; the actual AMS requirement is 100 ksi. * **Yield Strength (0.2% Offset):** **80 ksi min (550 MPa min)** * **Elongation (% in 2 inches / 50mm):** **3% min** * **Hardness (Typical Range):** 241 - 302 HB (Approx. 24 - 32 HRC) * **Impact Energy (Charpy V-Notch):** Typically 7 - 15 ft-lb (10 - 20 J) – Not always specified in AMS 5315D but often reported. **B. Typical Physical Properties:** * **Density:** ~7.1 - 7.2 g/cm³ * **Melting Range:** ~1120 - 1180 °C * **Modulus of Elasticity:** 24 - 25 x 10⁶ psi (165 - 172 GPa) * **Coefficient of Thermal Expansion:** ~6.5 x 10⁻⁶ /°C (20-200°C) * **Machinability:** Fair to Good. Superior to steel of similar hardness due to the graphite nodules, but alloying elements can increase tool wear. --- ### **4. Heat Treatment** All castings to AMS 5315D **must be heat treated**. The standard mandates: * **Normalize or Quench & Temper:** To refine the as-cast structure, achieve uniformity, and obtain the specified mechanical properties. * **Stress Relieve:** Required after all major machining operations to ensure dimensional stability in service. --- ### **5. Typical Applications** The combination of investment casting precision and the high-performance alloy design makes AMS 5315D ideal for complex, stressed components in demanding environments. * **Aerospace & Defense:** * **Turbine Engine Components:** Structural brackets, housings, supports, and cases in cooler sections of jet engines. * **Actuator & Landing Gear Components:** Housings, levers, and brackets requiring high strength-to-weight ratio and reliability. * **Missile & Ordnance Components:** Guidance system housings, structural bodies. * **High-Performance Automotive:** * **Turbocharger Housings** (especially early generations). * **High-stress Brackets and Mounts** for performance and racing applications. * **Industrial & Oil & Gas:** * **Valve Bodies and Components** for high-pressure service. * **Compressor Housings.** * **Rotary Seals and Wear Parts.** --- ### **6. Key Advantages & Summary** * **High Strength with Adequate Ductility:** Offers a tensile strength comparable to many low-alloy steels while maintaining useful elongation. * **Excellent Castability for Complex Shapes:** The investment process allows for intricate internal passages, thin walls, and high dimensional accuracy. * **Good Damping Capacity:** The graphite nodules absorb vibrational energy, beneficial for dynamic components. * **Cost-Effective for Complex Parts:** Near-net-shape casting reduces machining costs compared to fabricating from steel billet. * **Aerospace-Quality Assurance:** AMS certification ensures traceability, rigorous testing (tensile, microstructure, radiography), and process controls unmatched by commercial standards. **In summary, AMS 5315D defines a premium, investment-cast, nickel-copper-molybdenum alloyed ductile iron. It is a material of choice for engineers designing critical, geometrically complex structural components that must withstand high static and dynamic loads in aerospace and other advanced technological fields.** -:- For detailed product information, please contact sales. -: AMS 5315D(94) Ductile Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6598 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. -: AMS 5315D(94) Ductile Iron Properties -:- For detailed product information, please contact sales. -:

Applications of AMS 5315D(94) Ductile Iron Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers AMS 5315D(94) Ductile Iron Wire -:- For detailed product information, please contact sales. -:

Packing of AMS 5315D(94) Ductile Iron Wire -:- 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 Wire 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 3069 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