Maraging 250,Udimar 250 Wire,,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

### **Product Datasheet: Maraging Steel 250 / Udimar 250 Wire** --- #### **1. Product Overview** **Maraging Steel 250 Wire** (commercially known as **Udimar 250 Wire**) is a premium-grade wire product manufactured from ultra-high-strength maraging steel, designed for applications requiring exceptional strength and reliability in continuous or segmented forms. This wire maintains the outstanding mechanical properties of Maraging 250 alloy while offering the flexibility and processing advantages of wire forms. Available in various diameters, tempers, and surface finishes, it serves critical applications in aerospace, defense, and specialized industrial sectors where maximum strength-to-weight ratio is essential. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Balance | |---------|----------|----------|---------| | **Nickel (Ni)** | 17.00 | 19.00 | - | | **Cobalt (Co)** | 7.00 | 8.50 | - | | **Molybdenum (Mo)** | 4.50 | 5.20 | - | | **Titanium (Ti)** | 0.30 | 0.50 | - | | **Aluminum (Al)** | 0.05 | 0.15 | - | | **Iron (Fe)** | - | - | Balance | | **Carbon (C)** | - | 0.03 | - | | **Manganese (Mn)** | - | 0.10 | - | | **Silicon (Si)** | - | 0.10 | - | | **Sulfur (S)** | - | 0.01 | - | | **Phosphorus (P)** | - | 0.01 | - | --- #### **3. Physical & Mechanical Properties** **A. Mechanical Properties (After Final Heat Treatment)** - **Tensile Strength:** 1,720 - 1,790 MPa (250 - 260 ksi) - **Yield Strength (0.2% Offset):** 1,655 - 1,725 MPa (240 - 250 ksi) - **Elongation:** 10 - 14% - **Reduction in Area:** 45 - 55% - **Hardness:** 48 - 52 HRC - **Torsional Strength:** 1,200 - 1,350 MPa (175 - 195 ksi) - **Fatigue Strength:** Excellent performance in cyclic loading applications **B. Physical Properties** - **Density:** 8.00 g/cm³ (0.289 lb/in³) - **Modulus of Elasticity:** 185 GPa (26.8 × 10⁶ psi) - **Shear Modulus:** 72 GPa (10.4 × 10⁶ psi) - **Thermal Conductivity:** 19.0 - 21.0 W/m·K - **Electrical Resistivity:** 0.60 - 0.65 μΩ·m - **Thermal Expansion Coefficient:** 10.5 - 11.0 × 10⁻⁶/°C (20 - 100°C) **C. Standard Wire Specifications** - **Diameter Range:** 0.10 - 6.00 mm (0.004 - 0.236 inches) - **Diameter Tolerance:** ±0.005 mm for precision grades - **Spool Sizes:** 100 - 500 mm (4 - 20 inch) diameter - **Surface Finish:** Bright, coated, or plated options available - **Temper Conditions:** Annealed, hard-drawn, or heat-treated --- #### **4. Product Applications** **Aerospace Applications** - **Aircraft control** cable systems - **Safety wire** for critical fasteners - **Spring components** for aerospace systems - **Fastener manufacturing** stock - **Wire EDM** electrode material **Defense Applications** - **Weapon system** components - **Military vehicle** control systems - **Ordnance device** components - **Armor system** wire components - **Special projectile** components **Industrial Applications** - **High-strength** spring wire - **Wire form** components - **Fastener manufacturing** - **Cutting wire** for abrasive applications - **Medical device** components **Specialized Applications** - **Musical instrument** strings - **High-performance** springs - **Precision shafting** - **Test and measurement** components - **Research and development** applications --- #### **5. International Standards & Specifications** | Standard Body | Specification Number | Title/Description | |---------------|----------------------|-------------------| | **AMS** | AMS 6512 | Steel Bars, Forgings, and Tubing 18Ni (250) | | **ASTM** | A493 | Stainless Steel Wire and Wire Rods | | **UNS** | K92890 | Unified Numbering System Designation | | **MIL** | MIL-S-46850 | Steel, Maraging 250 Grade | | **ISO** | 6892-1 | Metallic materials - Tensile testing | --- #### **6. Processing & Fabrication** **Heat Treatment Guidelines** - **Solution Treatment:** 820°C ± 10°C, air cool - **Aging Treatment:** 480°C ± 5°C for 3-5 hours - **Stress Relieving:** Available for specific applications - **Annealing:** 650°C ± 10°C for soft condition **Fabrication Characteristics** - **Formability:** Excellent in annealed condition - **Weldability:** Good with proper procedures - **Machinability:** Good with proper tooling - **Surface Treatment:** Plating and coating compatible - **Springback:** Predictable and consistent --- #### **7. Quality Assurance** **Standard Testing** - **Dimensional Verification:** Laser micrometer inspection - **Surface Quality:** 100% visual inspection - **Mechanical Properties:** Sample testing from each lot - **Chemical Analysis:** Ladle and product certification - **Spooling Quality:** Uniform winding inspection **Specialized Testing** - **Torsion Testing:** For spring applications - **Wrap Testing:** Ductility verification - **Surface Defect Detection:** Eddy current testing - **Microstructural Analysis:** Grain structure verification --- #### **8. Technical Advantages** **Performance Benefits** - **High Strength-to-Weight Ratio:** Exceptional for weight-sensitive applications - **Superior Fatigue Resistance:** Excellent for dynamic applications - **Corrosion Resistance:** Better than conventional high-strength wires - **Consistent Properties:** Uniform throughout length - **Temperature Stability:** Maintains properties across wide temperature range **Processing Advantages** - **Consistent Diameter:** Tight tolerance control - **Surface Quality:** Minimal defects and imperfections - **Spooling Precision:** Tangle-free packaging - **Batch Consistency:** Reproducible performance - **Technical Support:** Application engineering available --- **Packaging & Handling:** - Protective spool packaging - Moisture-resistant wrapping - Clear identification and certification - Custom packaging available **Contact Information:** [Your Company Information] *Note: All mechanical properties are typical values and may vary based on specific processing conditions and heat treatment parameters. Consult official material specifications for definitive requirements and application recommendations.*

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 2585 gallon liquid totes Special package is available on request.