Maraging 350，Maraging C350 Forgings，,E FORU

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

**Product Datasheet: Maraging 350 / Maraging C350 Steel Forgings** **Overview** Maraging 350 (Maraging C350) Forgings represent the highest echelon of ultra-high-strength component manufacturing. These forgings are produced from a special low-carbon iron-nickel martensitic steel that develops its exceptional mechanical properties through a unique age-hardening heat treatment. The "350" designation indicates a nominal yield strength of 350 ksi (approximately 2413 MPa). The forging process refines the steel's grain structure, enhances density, and optimizes grain flow around the component's contours, resulting in superior directional strength, toughness, and fatigue resistance compared to other manufacturing methods. **Key Characteristics & Advantages** - **Superior Structural Integrity:** The forging process eliminates internal voids and defects, creating a homogeneous, dense microstructure. - **Optimized Grain Flow:** The grain structure is aligned to the shape of the part, significantly improving mechanical strength in critical directions. - **Ultra-High Strength & Toughness:** Achieves the highest combination of strength and fracture toughness in the maraging steel family. - **Excellent Fatigue Life:** Superior resistance to cyclic loading conditions due to refined grain structure and absence of internal stress concentrations. - **Enhanced Reliability:** Forgings provide consistent mechanical properties throughout the component, essential for critical applications. **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) - Modulus of Elasticity: 185-190 GPa (27 × 10⁶ psi) **Mechanical Properties (After Solution Annealing & Aging):** | Property | Typical Value | Condition | |----------|---------------|-----------| | Tensile Strength | 2450-2550 MPa (355-370 ksi) | Aged | | Yield Strength (0.2% Offset) | 2340-2410 MPa (340-350 ksi) | Aged | | Elongation | 8-12% | Aged | | Reduction of Area | 35-50% | Aged | | Hardness | 54-57 HRC | Aged | | Fracture Toughness (K_Ic) | 55-80 MPa√m | Aged | *Note: In the solution-annealed condition, forgings typically exhibit 28-32 HRC hardness, allowing for extensive machining operations.* **International Standards & Specifications** Maraging C350 Forgings are manufactured to meet rigorous international standards: - **AMS 6521G:** Primary specification for Maraging Steel 350 bars, forgings, and rings - **AMS 6519:** For 18% Nickel Maraging Steel (250 grade) forgings - **ASTM A579/A579M:** Standard specification for superstrength alloy steel forgings - **MIL-S-8949:** Military specification for maraging steel forgings - **Customer-Specific Requirements:** Often include additional NDT testing per NAS, NADCAP, or other industry standards **Product Applications** Maraging C350 Forgings are essential in the most demanding applications across multiple industries: **Aerospace & Defense:** - Rocket motor cases and missile bodies - Aircraft landing gear components - Helicopter rotor hubs and drive systems - Space vehicle structural members - Artillery and tank components **Industrial & Tooling:** - Extrusion press rams and containers - High-pressure vessel components - Plastic injection molding machine components - Die-casting machine components **Marine & Offshore:** - Submarine components - Deep-sea exploration equipment - Marine propulsion systems **Quality Assurance & Testing** All Maraging C350 Forgings undergo comprehensive quality control: - 100% ultrasonic inspection per AMS 2630 - Magnetic particle or liquid penetrant inspection - Chemical and mechanical property verification - Macro-etch testing for grain flow verification - Full traceability from melt to finished component **Conclusion** Maraging C350 Forgings provide an unmatched combination of ultra-high strength, exceptional toughness, and superior structural reliability. The forging process enhances these inherent material advantages, making them the preferred choice for mission-critical components where performance, weight savings, and absolute reliability are paramount. From space exploration to defense systems and high-performance industrial applications, Maraging C350 Forgings deliver proven performance in the world's most challenging environments. --- **Disclaimer:** The information provided herein is for reference purposes. Specific properties and performance characteristics may vary based on forging size, shape, and heat treatment parameters. Always consult with our technical team for project-specific requirements.

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 2647 gallon liquid totes Special package is available on request.