Maraging 300，Udimar 300 Wire，UNS K93120,E FORU

British Specs:，American Specs:AMS 6514 Bar, Tube and Forgings AMS 6521 Sheet, Strip and Plate MIL-S-46850 TYPE 4 ASTM A579 / AMS 6514 Powder，German Specs:WS 1.6354 WS 1.6358

### **Technical Data Sheet: Maraging Steel 300 / Udimar 300 Wire (UNS K93120)** --- #### **1. Product Overview** **Maraging Steel 300 Wire** (commercially known as **Udimar 300 Wire**, **UNS K93120**) is a premium-grade wire product manufactured from ultra-high-strength maraging steel, representing the highest strength grade in wire form. This product maintains the exceptional mechanical properties of Maraging 300 alloy while offering the flexibility and processing advantages of wire forms for critical applications in aerospace, defense, and specialized industrial sectors where maximum strength-to-weight ratio is essential. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Function | |---------|----------|----------|----------| | **Nickel (Ni)** | 18.00 | 19.00 | Matrix strengthening | | **Cobalt (Co)** | 8.50 | 9.50 | Solid solution strengthening | | **Molybdenum (Mo)** | 4.60 | 5.20 | Precipitation hardening | | **Titanium (Ti)** | 0.50 | 0.80 | Primary age-hardening | | **Aluminum (Al)** | 0.05 | 0.15 | Secondary age-hardening | | **Carbon (C)** | - | 0.03 | Impurity control | | **Iron (Fe)** | - | - | Balance | --- #### **3. Mechanical & Physical Properties** **A. Mechanical Properties (Aged Condition)** - **Tensile Strength:** 2,000-2,140 MPa (290-310 ksi) - **Yield Strength:** 1,930-2,070 MPa (280-300 ksi) - **Elongation:** 8-10% - **Reduction in Area:** 40-50% - **Hardness:** 52-56 HRC - **Torsional Strength:** 1,300-1,450 MPa - **Fatigue Strength:** Excellent in cyclic loading applications **B. Physical Properties** - **Density:** 8.00 g/cm³ - **Modulus of Elasticity:** 185 GPa - **Shear Modulus:** 72 GPa - **Thermal Conductivity:** 18.0-20.0 W/m·K - **Electrical Resistivity:** 0.65-0.70 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 (32-36 HRC) - Hard Drawn - Aged (52-56 HRC) **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** | 6514 | Steel Bars, Forgings, and Tubing | | **ASTM** | A493 | Stainless Steel Wire and Wire Rods | | **UNS** | K93120 | Unified Numbering System | | **MIL** | S-46850 | Maraging Steel Grade 300 | --- #### **7. Processing & Fabrication** **Heat Treatment:** - **Solution Treatment:** 820 ± 10°C (1,508 ± 18°F), air cool - **Aging Treatment:** 480 ± 5°C (896 ± 9°F), 3-8 hours - **Stress Relieving:** Available for specific applications - **Annealing:** 650°C ± 10°C for soft condition **Fabrication Characteristics:** - Good formability in annealed condition - Adequate weldability with proper procedures - Good machinability with proper tooling - Predictable and consistent springback --- #### **8. Quality Assurance** **Testing & Certification:** - Dimensional verification with laser micrometer - 100% visual surface inspection - Mechanical testing from sample lots - Chemical analysis certification - Spooling quality inspection **Specialized Testing:** - Torsion testing for spring applications - Wrap testing for ductility verification - Surface defect detection with eddy current - Microstructural analysis --- #### **9. Technical Advantages** **Performance Benefits:** - Highest strength-to-weight ratio in wire form - Superior fatigue resistance - Better corrosion resistance than conventional wires - Uniform properties throughout length - Excellent temperature stability **Processing Advantages:** - Tight tolerance control - Minimal defects and imperfections - Tangle-free packaging - Reproducible performance --- **Packaging & Handling:** - Protective spool packaging - Moisture-resistant wrapping - Clear identification and certification - Custom packaging available **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. Due to the high strength of Maraging 300, special attention to processing parameters is required. 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 2624 gallon liquid totes Special package is available on request.