Maraging 350，Maraging C350 Foil，Shim，,E FORU

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

**Product Technical Specification: Maraging 350 / Maraging C350 Foil & Shim Stock** **Overview** Maraging 350 (Maraging C350) Foil and Shim materials represent the ultimate in ultra-high-strength, precision-thin product forms. These materials maintain the exceptional characteristics of the Maraging 350 alloy system while providing unparalleled performance in thicknesses ranging from foil gauges (typically 0.001" - 0.020") to shim stock (up to 0.125"). The "C350" designation indicates the nominal 350 ksi (2413 MPa) yield strength achievable through proper age-hardening treatment. **Key Characteristics & Advantages** - **Ultra-High Strength in Thin Sections:** Maintains exceptional mechanical properties even at minimal thicknesses - **Precision Thickness Control:** Manufactured to tight tolerances for critical spacing and alignment applications - **Excellent Spring Properties:** High yield strength ensures permanent set resistance in demanding spring applications - **Superior Flatness and Surface Quality:** Essential for precision sealing and interface applications - **Dimensional Stability:** Minimal distortion during age-hardening process - **Machinability and Formability:** Can be stamped, blanked, and formed in the annealed condition **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) - Thermal Conductivity: 19.0 W/m·K at 20°C - Electrical Resistivity: 0.70 μΩ·m at 20°C **Mechanical Properties (After Age Hardening):** | Property | Foil (≤0.020") | Shim Stock (0.020"-0.125") | |----------|----------------|----------------------------| | Tensile Strength | 2350-2500 MPa | 2450-2550 MPa | | Yield Strength (0.2%) | 2250-2400 MPa | 2340-2410 MPa | | Elongation in 2" | 3-6% | 6-10% | | Hardness | 52-56 HRC | 54-57 HRC | | Flatness | ±0.001"/in | ±0.0005"/in | **Available Forms & Specifications** **Standard Thickness Ranges:** - **Precision Foil:** 0.001" - 0.020" (0.025 - 0.50 mm) - **Shim Stock:** 0.020" - 0.125" (0.50 - 3.18 mm) **Standard Tolerances:** - Thickness: ±0.0001" for foil, ±0.0005" for shim stock - Width: Up to 24" depending on thickness - Surface Finish: 8-16 μin (0.20-0.41 μm) RA **International Standards & Specifications** **Material Standards:** - **AMS 6521G:** Maraging Steel 350 Sheet, Strip, and Plate - **AMS 6519:** Maraging Steel 250 Sheet, Strip, and Plate - **ASTM A693:** Precipitation-Hardening Stainless and Maraging Steel Plate, Sheet, and Strip **Dimensional Standards:** - **ASTM A480/A480M:** General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel - **AMS 2247:** Steel Foil and Strip, Corrosion and Heat-Resistant - **Customer-Specific Requirements:** Custom sizes and tolerances available **Specialized Applications** **Aerospace & Defense:** - Precision shims for aircraft engine assemblies - Thin diaphragms for pressure sensors and transducers - Spring elements in guidance systems - High-strength foil for radiation shielding **Electronics & Semiconductor:** - Lead frames for high-reliability electronics - Shielding for electromagnetic interference - Precision springs in connector systems - Heat spreaders in high-power devices **Industrial & Precision Engineering:** - High-strength sealing washers - Precision spacers in bearing assemblies - Spring components in measuring instruments - Wear strips in high-load applications **Medical Devices:** - Surgical instrument components - Implantable device elements - Diagnostic equipment springs - Precision shims for medical imaging systems **Fabrication & Processing Notes** **Heat Treatment:** - Supplied in solution-annealed condition (28-32 HRC) for forming - Age hardening at 480°C ± 5°C (900°F ± 10°F) for 3-6 hours for final properties - Special atmospheres available to prevent surface oxidation **Manufacturing Capabilities:** - Precision stamping and blanking - Photochemical etching for complex geometries - Laser cutting for prototype quantities - Surface treatments and coatings available **Handling & Quality Assurance** **Quality Control:** - 100% dimensional verification - Surface quality inspection - Mechanical property testing on witness samples - Chemical analysis certification **Packaging:** - Interleaved with protective paper - Wound on precision cores (foil) - Flat-packed with protective separators (shim stock) **Technical Support Services** - Material selection assistance - Design for manufacturability consulting - Prototype development - Custom heat treatment services **Conclusion** Maraging 350 Foil and Shim materials provide engineers with an unparalleled combination of ultra-high strength and precision thinness. These products enable innovative solutions in weight-critical and space-constrained applications across aerospace, electronics, medical, and industrial sectors. The material's unique ability to be formed in the soft condition and then strengthened to the highest levels available in commercial alloys makes it indispensable for advanced engineering applications. --- **Note:** Specifications subject to change based on manufacturing process and customer requirements. Consult technical data sheets for specific application guidance. All values are typical and may vary based on processing parameters and final heat treatment.

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 2649 gallon liquid totes Special package is available on request.