Maraging 250,Vascomax C250 Sheet,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 Sheet (UNS K92940)** --- #### **1. Product Overview** **Vascomax C250 Sheet** (commercially designated as **Maraging 250 Sheet**, **UNS K92940**) is a thin, flat-rolled product manufactured from ultra-high-strength maraging steel, designed for applications requiring exceptional strength-to-weight ratio in lightweight structures. This product combines the superior mechanical properties of Vascomax C250 alloy with the precision of sheet manufacturing, providing optimal solutions for aerospace components, defense systems, and high-performance applications where weight reduction and reliability are critical. --- #### **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 - **Fracture Toughness:** Maintains good toughness in thin sections - **Bendability:** Excellent in annealed condition **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** **Sheet Dimensions:** - **Thickness Range:** 0.5-6.0 mm (0.020-0.236 inches) - **Width Range:** 600-1,200 mm (24-48 inches) - **Length Range:** 1,200-2,400 mm (48-96 inches) - **Thickness Tolerance:** ±0.05 mm (precision grades) - **Flatness:** ≤ 2 mm/m - **Surface Finish:** Cold-rolled, annealed, and pickled **Available Conditions:** - Annealed (30-34 HRC) - Solution Treated - Aged (50-54 HRC) --- #### **5. Applications** **Aerospace & Aviation:** - Aircraft structural panels - Wing and tail surface reinforcements - Rocket motor case segments - Helicopter armor protection panels - Space vehicle structural members **Defense & Security:** - Armor vehicle structural panels - Weapon system enclosures and mounts - Military equipment housings - Ballistic protection inserts - Portable defense system components **Precision Engineering:** - High-performance tooling components - Precision instrument frames - Optical mounting systems - Medical device components - Testing equipment structural parts --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6512 | Bars, Forgings, and Tubing | | **ASTM** | A538 | Grade 250 | | **ASTM** | A693 | Precipitation-Hardening Steel Plate | | **UNS** | K92940 | Unified Numbering System | --- #### **7. Heat Treatment Process** **Solution Annealing:** - **Temperature:** 815-830°C (1,500-1,525°F) - **Time:** 30-60 minutes - **Cooling:** Air cool - **Hardness:** 30-34 HRC **Aging Treatment:** - **Temperature:** 480-495°C (895-925°F) - **Time:** 2-4 hours - **Cooling:** Air cool - **Hardness:** 50-54 HRC --- #### **8. Forming & Fabrication** **Forming Characteristics:** - Bend Radius: Minimum 2x material thickness - Stretch Forming: Suitable for complex shapes - Deep Drawing: Good performance in annealed condition - Springback: Predictable and consistent **Machining & Joining:** - Machine in annealed condition - TIG and laser welding recommended - Excellent surface for adhesive bonding - All conventional fastening methods applicable --- #### **9. Quality Assurance** **Testing & Certification:** - Dimensional verification - Surface inspection - Mechanical testing - Flatness measurement - Full material traceability **Quality Standards:** - Aerospace quality (AS9100) - Nadcap accredited - Military compliance - Statistical process control --- **Packaging & Handling:** - Protective interleaving between sheets - Moisture-resistant wrapping - Wooden crates for large shipments - Clear identification and certification **Contact:** [Your Company Information] *Note: Vascomax is a registered trademark of Carpenter Technology Corporation. All properties typical for aged condition. Forming and fabrication should be completed before final aging treatment. 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 2605 gallon liquid totes Special package is available on request.