Aermet 100, ,UNS K92580,E FORU

British Specs:，American Specs:AMS 6532 Bar and Forgings，German Specs:

### **Product Introduction: Aermet® 100 (UNS K92580)** **Aermet® 100** is a premium, ultra-high-strength secondary hardening steel designed to provide an exceptional combination of very high strength, superior fracture toughness, and good stress corrosion cracking resistance. Designated as **UNS K92580**, it represents the pinnacle of performance for critical aerospace and defense components where weight savings and structural reliability under extreme loads are paramount. Developed through advanced metallurgical technology, Aermet 100 achieves its properties through a precise balance of nickel, cobalt, and chromium, followed by a specific heat treatment process involving austenitizing, quenching, and aging. It is the successor to alloys like 300M, offering significantly better toughness at comparable strength levels. --- #### **1. Chemical Composition** The exceptional properties of Aermet 100 are derived from its carefully optimized chemical composition. **Typical Chemical Composition (Weight %):** | Element | Content (%) | Role in the Alloy | | :--- | :---: | :--- | | **Iron (Fe)** | Balance | Base Element | | **Nickel (Ni)** | 11.0 - 12.5 | Enhances toughness, hardenability, and strength | | **Cobalt (Co)** | 13.0 - 14.0 | Promotes secondary hardening by suppressing the dissolution of alloy carbides during austenitizing | | **Chromium (Cr)** | 3.0 - 3.4 | Contributes to hardenability and provides moderate corrosion resistance | | **Molybdenum (Mo)** | 1.2 - 1.4 | Forms fine carbides for secondary hardening, increases strength and toughness | | **Carbon (C)** | 0.21 - 0.25 | Primary strengthening element, forms metal carbides | | **Manganese (Mn)** | ≤ 0.10 | - | | **Silicon (Si)** | ≤ 0.10 | - | | **Phosphorus (P)** | ≤ 0.005 | Impurity control for improved toughness | | **Sulfur (S)** | ≤ 0.005 | Impurity control for improved toughness | --- #### **2. Physical & Mechanical Properties** Aermet 100's properties are achieved through a specific thermal treatment cycle (solution treatment and aging). The values below are typical for the material in the peak-aged condition. **A. Mechanical Properties (At Room Temperature):** * **Tensile Ultimate Strength:** **1,725 - 1,930 MPa** (250 - 280 ksi) * **Tensile Yield Strength (0.2% Offset):** **1,585 - 1,725 MPa** (230 - 250 ksi) * **Elongation (in 4D):** **10 - 14%** * **Reduction in Area:** **50 - 60%** * **Hardness:** **50 - 54 HRC** * **Fracture Toughness (K_Ic):** **110 - 130 MPa√m** **B. Physical Properties:** * **Density:** 7.86 g/cm³ (0.284 lb/in³) * **Melting Range:** ~ 1430 °C (2600 °F) * **Modulus of Elasticity (E):** 200 GPa (29 x 10⁶ psi) * **Poisson's Ratio:** 0.30 * **Electrical Resistivity:** ~ 0.40 μΩ·m * **Thermal Conductivity:** ~ 25 W/m·K --- #### **3. Product Applications** Aermet 100 is specified for the most demanding aerospace, defense, and motorsport applications where failure is not an option. * **Aerospace:** * **Aircraft Landing Gear:** Critical components such as pistons, rods, and actuators for carrier-based and high-performance aircraft. * **Airframe Components:** High-stress fittings, brackets, and arrestor hooks. * **Helicopter Components:** Rotor pins and other dynamic, high-strength parts. * **Defense:** * **Armor Penetrators:** Used in kinetic energy penetrators due to its high mass efficiency and self-sharpening behavior. * **Vehicle Components:** Critical parts for armored vehicles. * **Motorsports:** * **High-Performance Connecting Rods:** Where extreme strength-to-weight ratio is critical for engine performance and reliability. * **Suspension Components:** Pushrods and other critical structural members. * **Tooling:** * **Dies and Mandrels:** For applications requiring high wear resistance and strength without brittleness. --- #### **4. International Standards & Specifications** Aermet 100 is covered by several key aerospace and material specifications. * **Aerospace Material Specifications (AMS):** * **AMS 6532:** This is the primary specification for Aermet 100, covering bars, forgings, and rings. * **Aerospace Standards (AS):** * **AS 7482:** Standard for Aermet 100 steel, consumable electrode melted. * **U.S. Military Standards (MIL):** * **MIL-DTL-32375:** Detail specification for Aermet 100 steel. * **Unified Numbering System (UNS):** * **UNS K92580** * **Manufacturer Specification:** * **Carpenter Technology Aermet® 100 Data Sheet:** Provides detailed processing and property guidelines. --- #### **5. Key Advantages & Processing Considerations** * **Unmatched Strength-Toughness Combination:** Offers superior fracture toughness compared to other steels at similar ultra-high strength levels. * **Good Stress Corrosion Cracking (SCC) Resistance:** Provides better performance in corrosive environments than many other ultra-high-strength steels. * **High Fatigue Strength:** Excellent resistance to crack initiation under cyclic loading. * **Forgability:** Can be successfully forged, though it requires careful control of temperature and deformation. **Critical Processing Notes:** * **Heat Treatment is Crucial:** Aermet 100 requires a precise three-step heat treatment: Austenitizing, Quenching, and Aging to achieve its signature properties. * **Machining:** Must be machined in the annealed condition. After final heat treatment, it is extremely hard and requires grinding or EDM (Electrical Discharge Machining) for further shaping. * **Welding:** Not generally recommended for fabrication due to high crack sensitivity. If necessary, specialized procedures and post-weld heat treatment are required. **Aermet 100 is a specialized, high-performance alloy. Successful implementation requires close collaboration with the material supplier and strict adherence to specified processing routes.** ---

Packing of Standard Packing: 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 2560 gallon liquid totes Special package is available on request.