Maraging 350，Maraging C350 Wire，,E FORU

British Specs:，American Specs: AMS 6515 MIL-S-46850，German Specs: WS 1.6356

**Product Technical Specification: Maraging 350 / Maraging C350 Wire** **Overview** Maraging 350 (Maraging C350) Wire is an ultra-high-strength, low-carbon martensitic steel supplied in wire form, combining exceptional strength with excellent fabrication characteristics. The "350" designation indicates its nominal yield strength of 350 ksi (approximately 2413 MPa) achieved through age-hardening heat treatment. This product form maintains the fundamental advantages of the Maraging 350 alloy system while offering unique capabilities for specific manufacturing processes and applications. **Key Characteristics & Advantages** - **Ultra-High Strength with Good Ductility:** Maintains excellent mechanical properties in wire form - **Consistent Diameter Control:** Precision-drawn to tight tolerances for reliable performance - **Excellent Surface Quality:** Minimizes defects in final applications - **Superior Spring Properties:** High elastic limit and fatigue resistance - **Good Weldability:** Can be used as welding wire for high-strength applications - **Age-Hardenable:** Develops full properties after final heat treatment **Chemical Composition (Typical Weight %)** | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | Nickel (Ni) | 18.0-19.0 | Cobalt (Co) | 11.5-12.5 | | Molybdenum (Mo) | 4.6-5.2 | Titanium (Ti) | 1.3-1.6 | | Carbon (C) | ≤0.03 | Manganese (Mn) | ≤0.10 | | Silicon (Si) | ≤0.10 | Sulfur (S) | ≤0.010 | | Phosphorus (P) | ≤0.010 | Aluminum (Al) | 0.05-0.15 | | Boron (B) | 0.003-0.005 | Zirconium (Zr) | 0.01-0.02 | | Iron (Fe) | Balance | | | **Physical & Mechanical Properties** **Physical Properties:** - Density: 8.10 g/cm³ (0.292 lb/in³) - Melting Point: 1410°C (2570°F) - Thermal Expansion Coefficient: 10.2 × 10⁻⁶/°C (20-100°C) - Electrical Resistivity: 0.70 μΩ·m at 20°C - Modulus of Elasticity: 185-190 GPa (27 × 10⁶ psi) **Mechanical Properties (After Age Hardening):** | Property | Typical Value | Condition | |----------|---------------|-----------| | Tensile Strength | 2400-2550 MPa | Aged | | Yield Strength (0.2%) | 2300-2410 MPa | Aged | | Elongation | 6-10% | Aged | | Reduction of Area | 35-45% | Aged | | Hardness | 54-57 HRC | Aged | | Fatigue Strength | Exceptionally High | Aged | **Available Forms & Specifications** **Standard Diameter Ranges:** - Fine Wire: 0.1 mm - 1.0 mm (0.004" - 0.040") - Medium Wire: 1.0 mm - 5.0 mm (0.040" - 0.200") - Heavy Wire: 5.0 mm - 12.0 mm (0.200" - 0.500") **Surface Conditions:** - Bright finished - Oxide-free - Special coatings available (Cu-coated, etc.) **International Standards & Specifications** **Primary Standards:** - **AMS 6521G:** Maraging Steel 350 Bars and Wire - **ASTM A579/A579M:** Superstrength Alloy Steel Forgings - **MIL-S-8949:** Maraging Steel Plate, Sheet, and Strip **Wire-Specific Standards:** - **ASTM A493:** Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging - **AMS 2247:** Steel Foil and Strip, Corrosion and Heat-Resistant - Customer-specific requirements and specifications **Specialized Applications** **Aerospace & Defense:** - High-strength fasteners and pins - Springs for critical aerospace mechanisms - Wire for welding rocket motor cases - Control cable components - Safety wire applications **Industrial & Manufacturing:** - Springs for high-stress applications - Wire for cold heading and forming - Fastener manufacturing - Wire EDM electrode material - Precision shafting **Medical Devices:** - Surgical instrument components - Orthodontic archwires - Implantable device elements - Guide wires (special processing) **Oil & Gas:** - Downhole tool components - Wireline applications - High-strength cabling **Fabrication & Processing** **Heat Treatment:** - Supplied in solution-annealed condition (28-32 HRC) - Age hardening at 480°C ± 5°C (900°F ± 10°F) for 3-6 hours - Special heat treatments available for specific applications **Manufacturing Capabilities:** - Cold drawing to precise diameters - Straightening and cutting to length - Spooling for continuous processing - Surface treatment and coating **Welding Applications:** - Used as filler wire for joining maraging steel components - Suitable for GTAW, GMAW, and PAW processes - Requires post-weld aging for full strength **Quality Assurance & Testing** **Standard Testing:** - Chemical analysis certification - Mechanical property verification - Surface quality inspection - Dimensional accuracy checking - Spooling quality assessment **Special Testing Available:** - Fatigue testing - Stress rupture testing - Corrosion resistance evaluation - Microstructural analysis **Packaging Options** - Spools (various sizes) - Straight lengths - Coils - Custom packaging to prevent damage **Technical Support Services** - Material selection guidance - Fabrication process optimization - Heat treatment consultation - Application engineering support **Conclusion** Maraging 350 Wire offers an exceptional combination of ultra-high strength, excellent fabrication characteristics, and reliable performance in demanding applications. Its versatility across multiple industries—from aerospace fasteners to medical devices and industrial springs—makes it a valuable material solution for engineers seeking the ultimate in strength-to-weight ratio and performance reliability. --- **Note:** Properties and performance characteristics may vary based on wire diameter, processing history, and final heat treatment. Always consult technical data sheets for specific application requirements and verify compatibility with intended use conditions.

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 2650 gallon liquid totes Special package is available on request.