Maraging 250,Maraging C250 Wire,UNS K92890,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 Steel 250 / Maraging C250 Wire (UNS K92890)** --- #### **1. Product Overview** **Maraging Steel 250 Wire** (commercially designated as **Maraging C250 Wire**, **UNS K92890**) 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 for critical applications in aerospace, defense, and specialized industrial sectors. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Function | |---------|----------|----------|----------| | **Nickel (Ni)** | 17.00 | 19.00 | Austenite stabilization, toughness | | **Cobalt (Co)** | 7.00 | 8.50 | Strengthening, inhibits austenite reversion | | **Molybdenum (Mo)** | 4.50 | 5.20 | Precipitation hardening, strength | | **Titanium (Ti)** | 0.30 | 0.50 | Primary age-hardening element | | **Aluminum (Al)** | 0.05 | 0.15 | Secondary age-hardening element | | **Carbon (C)** | - | 0.03 | Minimizes carbide formation | | **Iron (Fe)** | - | - | Balance | --- #### **3. Mechanical & Physical Properties** **A. Mechanical Properties (Aged Condition)** - **Tensile Strength:** 1,724-1,793 MPa (250-260 ksi) - **Yield Strength:** 1,655-1,724 MPa (240-250 ksi) - **Elongation:** 10-14% - **Reduction in Area:** 45-55% - **Hardness:** 48-52 HRC - **Torsional Strength:** 1,200-1,350 MPa **B. Physical Properties** - **Density:** 8.00 g/cm³ - **Modulus of Elasticity:** 185 GPa - **Shear Modulus:** 72 GPa - **Thermal Conductivity:** 19.0-21.0 W/m·K - **Electrical Resistivity:** 0.60-0.65 μΩ·m --- #### **4. Product Specifications** **Wire Dimensions:** - **Diameter Range:** 0.10-6.00 mm (0.004-0.236 inches) - **Diameter Tolerance:** ±0.005 mm (precision grades) - **Standard Spool Sizes:** 100-500 mm (4-20 inch) diameter - **Length:** Continuous coils or cut lengths **Available Conditions:** - **Annealed:** 28-32 HRC (for forming/machining) - **Hard Drawn:** Intermediate strength - **Aged:** 48-52 HRC (full strength) **Surface Finishes:** - Bright finish - Coated options - Plated variations - Custom surface treatments --- #### **5. Applications** **Aerospace & Defense:** - Aircraft control cable systems - Safety wire for critical fasteners - Spring components for aerospace systems - Fastener manufacturing stock - Ordnance device 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 --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6512 | Steel Bars, Forgings, and Tubing | | **ASTM** | A493 | Stainless Steel Wire and Wire Rods | | **UNS** | K92890 | Unified Numbering System | | **MIL** | S-46850 | Maraging Steel Grade 250 | --- #### **7. Processing & Fabrication** **Heat Treatment:** - **Solution Treatment:** 820°C ± 10°C, air cool - **Aging Treatment:** 480°C ± 5°C, 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 - **Springback:** Predictable and consistent --- #### **8. Quality Assurance** **Testing & Certification:** - **Dimensional Verification:** Laser micrometer inspection - **Surface Quality:** 100% visual inspection - **Mechanical Testing:** 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 --- #### **9. Packaging & Handling** **Standard Packaging:** - Protective spool packaging - Moisture-resistant wrapping - Clear identification and certification - Custom packaging available **Handling Instructions:** - Store in dry environment - Avoid kinking or sharp bends - Use proper unspooling techniques - Protect from surface damage --- **Ordering Information:** - Available in standard and custom diameters - Various tempers and surface finishes - Technical support available - Quick delivery options **Contact:** [Your Company Information] *Note: All mechanical properties are typical for material in the fully aged condition. Wire is normally supplied in annealed condition for forming operations. Consult technical team for specific application requirements and processing 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 2598 gallon liquid totes Special package is available on request.