Maraging 250,Vascomax C250 Strip,UNS K92940,E FORU

British Specs:BS S162，American Specs:AMS 6512 Bar, Tube, Forgings AMS 6520 Sheet, Strip and Plate ASTM A646 MIL-S-46850 Type 3，German Specs:WS 1.6359

### **Technical Data Sheet: Maraging 250 / Vascomax C250 Strip (UNS K92940)** --- #### **1. Product Overview** **Vascomax C250 Strip** (commercially designated as **Maraging 250 Strip**, **UNS K92940**) is a precision cold-rolled product manufactured from ultra-high-strength maraging steel, supplied in thin, narrow coils or straight lengths. This product combines the exceptional mechanical properties of Vascomax C250 alloy with the dimensional precision required for high-volume manufacturing of small, complex components. The strip form enables production of precision parts where consistent material properties and tight tolerances are critical in aerospace, defense, and electronic applications. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Function | |---------|----------|----------|----------| | **Nickel (Ni)** | 18.00 | 19.00 | Matrix strengthening | | **Cobalt (Co)** | 7.00 | 7.50 | Solid solution strengthening | | **Molybdenum (Mo)** | 4.60 | 5.10 | Precipitation hardening | | **Titanium (Ti)** | 0.40 | 0.50 | Primary age-hardening | | **Aluminum (Al)** | 0.05 | 0.10 | Secondary age-hardening | | **Carbon (C)** | - | 0.03 | Impurity control | | **Iron (Fe)** | - | - | Balance | --- #### **3. Mechanical & Physical Properties** **A. Mechanical Properties (Aged Condition)** - **Tensile Strength:** 1,793-1,862 MPa (260-270 ksi) - **Yield Strength:** 1,724-1,793 MPa (250-260 ksi) - **Elongation:** 8-12% - **Hardness:** 50-54 HRC - **Fatigue Strength:** Excellent in high-cycle applications - **Spring Properties:** Superior resilience and durability **B. Physical Properties** - **Density:** 8.00 g/cm³ - **Modulus of Elasticity:** 186 GPa - **Thermal Conductivity:** 20.0-22.0 W/m·K - **Thermal Expansion:** 10.6-11.1 × 10⁻⁶/°C --- #### **4. Product Specifications** **Strip Dimensions:** - **Thickness Range:** 0.05-3.0 mm (0.002-0.118 inches) - **Width Range:** 10-300 mm (0.4-12 inches) - **Coil Dimensions:** ID 510 mm (20 inches), OD up to 1,500 mm (59 inches) - **Thickness Tolerance:** ±0.005 mm (precision grades) - **Width Tolerance:** ±0.1 mm (precision slitting) - **Surface Finish:** Bright annealed or skin passed **Available Conditions:** - Annealed (30-34 HRC) - Solution Treated - Aged (50-54 HRC) --- #### **5. Applications** **Precision Components:** - Aircraft fastener systems - Spring components for aerospace - Shim stock for critical assemblies - Retaining rings and precision clips - Contact components for electronic devices **Electronics & Defense:** - Connector components - Relay and switch parts - Weapon system small components - Guidance system precision parts - Armor system internal components **Industrial Applications:** - High-strength springs - Precision stampings for medical devices - Cutting tool stock - Bearing components - Instrumentation precision elements --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6512 | Bars, Forgings, and Tubing | | **ASTM** | A538 | Grade 250 | | **ASTM** | A693 | Precipitation-Hardening Steel | | **UNS** | K92940 | Unified Numbering System | --- #### **7. Heat Treatment Process** **Solution Annealing:** - **Temperature:** 815-830°C (1,500-1,525°F) - **Time:** 15-30 minutes - **Cooling:** Controlled air cool - **Hardness:** 30-34 HRC **Aging Treatment:** - **Temperature:** 480-495°C (895-925°F) - **Time:** 2-3 hours - **Cooling:** Air cool - **Hardness:** 50-54 HRC --- #### **8. Fabrication Characteristics** **Stamping & Forming:** - Excellent blankability in annealed condition - Suitable for complex geometries - Clean edges with proper die clearance - Minimum bend radius 2x material thickness **Surface Treatment:** - Excellent substrate for various platings - Passivation improves corrosion resistance - Various functional coatings applicable - Achieves high surface finishes --- #### **9. Quality Assurance** **Testing & Certification:** - Dimensional control with laser scanning - 100% visual surface inspection - Mechanical testing with statistical process control - Chemical analysis certification - Microcleanliness control **Specialized Testing:** - Flatness verification - Edge quality monitoring - Surface roughness measurement - Burr height measurement --- **Packaging & Handling:** - Protective interleaving for surface preservation - Moisture-resistant wrapping with desiccant - Custom slitting and rewinding services - Clear identification and certification **Contact:** [Your Company Information] *Note: Vascomax is a registered trademark of Carpenter Technology Corporation. All properties typical for aged condition. Strip normally supplied in annealed condition for forming operations. Consult technical team for specific application requirements.*

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 2606 gallon liquid totes Special package is available on request.