Maraging 350，Vascomax C350 Plate，,E FORU

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

**Product Technical Specification: Maraging 350 / Vascomax® C350 Plate** **Overview** Maraging 350/Vascomax® C350 Plate is an ultra-high-strength, low-carbon martensitic steel supplied in plate form, designed for the most demanding structural applications where exceptional strength-to-weight ratio and reliability are critical. This premium-grade material achieves its remarkable mechanical properties through a unique age-hardening heat treatment process, making it the ideal choice for aerospace, defense, and high-performance industrial applications. **Key Characteristics & Advantages** - **Ultra-High Strength:** 350 ksi (2413 MPa) nominal yield strength - **Exceptional Fracture Toughness:** Superior crack resistance despite extreme strength levels - **Excellent Dimensional Stability:** Minimal distortion during age hardening - **Superior Fatigue Resistance:** Outstanding performance under cyclic loading - **Good Weldability:** Can be welded in solution-annealed condition - **Outstanding Machinability:** Excellent machining characteristics in annealed state --- **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) - **Thermal Conductivity:** 19.0 W/m·K at 20°C **Mechanical Properties (After Full Heat Treatment):** | 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 | *Solution-annealed condition: 28-32 HRC* --- **Product Specifications** **Available Sizes:** - **Thickness:** 0.125" to 12" (3.18 mm to 305 mm) - **Width:** Up to 120" (3048 mm) - **Length:** Up to 360" (9144 mm) **Surface Conditions:** - Hot-rolled, annealed, and descaled - Machined surfaces available - Special surface finishes upon request **Tolerances:** - Thickness: ±0.005" to ±0.030" (depending on thickness) - Flatness: Standard and premium grades available --- **International Standards & Specifications** **Primary Standards:** - **AMS 6521G:** Maraging Steel 350 Plate, Sheet, and Strip - **MIL-S-8949:** Maraging Steel Plate, Sheet, and Strip - **ASTM A579/A579M:** Superstrength Alloy Steel Forgings **Additional Specifications:** - **AMS 2759/9:** Heat Treatment of Maraging Steels - **AMS 2301:** Aircraft Quality Steel Cleanliness - **AMS 2631:** Ultrasonic Inspection --- **Product Applications** **Aerospace & Defense:** - **Rocket Motor Cases:** Solid and liquid propellant systems - **Aircraft Landing Gear:** Critical structural components - **Missile Body Structures:** Airframe and wing components - **Helicopter Rotor Systems:** Hub and blade components - **Space Vehicle Structures:** Primary and secondary structures **Tooling & Industrial:** - **Extrusion Press Components:** Rams and containers - **Injection Molding:** High-pressure mold plates - **Die-Casting Machines:** Platen and die components - **Precision Machinery:** High-strength structural frames **Special Applications:** - **Nuclear Industry:** Reactor components - **High-Performance Automotive:** Chassis and suspension - **Marine Engineering:** Submarine and ship components - **Energy Sector:** Turbine and generator components --- **Fabrication & Processing** **Heat Treatment:** - **Solution Annealing:** 820°C ± 10°C (1500°F ± 20°F) for 1 hour per inch of thickness - **Age Hardening:** 480°C ± 5°C (900°F ± 10°F) for 3-6 hours **Machining Guidelines:** - Optimal in solution-annealed condition - Use positive rake tooling with sharp edges - Recommended speeds: 50-100 SFM - Feed rates: 0.005-0.015 inches per revolution - Use generous coolant flow **Welding Procedures:** - Weld in solution-annealed condition - Use matching filler metals (Maraging 350) - Post-weld aging required for full strength - All common welding methods applicable --- **Quality Assurance** **Standard Testing:** - Chemical analysis certification - Mechanical property testing - Ultrasonic inspection per AMS 2631 - Magnetic particle inspection - Macro-etch testing for soundness **Additional Services:** - Full traceability documentation - Third-party inspection reports - Custom testing protocols - Material certification to customer specifications --- **Conclusion** Maraging 350/Vascomax® C350 Plate represents the ultimate in ultra-high-strength steel plate technology, offering an unmatched combination of strength, toughness, and reliability. Its unique heat treatment characteristics and superior mechanical properties make it the material of choice for the world's most demanding applications in aerospace, defense, and high-performance industrial sectors. The material's proven performance in critical applications ensures its continued position as the premier solution for engineering challenges where failure is not an option. --- **Note:** Vascomax® is a registered trademark of leading specialty steel manufacturers. All technical data are typical values and should be verified for specific applications. Consult manufacturer's specifications for project-specific requirements and performance data.

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 2656 gallon liquid totes Special package is available on request.