Maraging 350，Vascomax C350 Rod，,E FORU

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

**Product Technical Specification: Maraging 350 / Vascomax® C350 Rod** **Overview** Maraging 350/Vascomax® C350 Rod is an ultra-high-strength, low-carbon martensitic steel supplied in round bar form, offering the exceptional combination of 350 ksi (2413 MPa) nominal yield strength and remarkable fracture toughness. This product form serves as the primary raw material for machining critical components across aerospace, defense, and high-performance industrial applications where reliability and strength-to-weight ratio are paramount. **Key Characteristics & Advantages** - **Ultra-High Strength:** 350 ksi minimum yield strength in aged condition - **Exceptional Machinability:** Superior machining characteristics in solution-annealed condition - **Consistent Microstructure:** Uniform grain structure throughout cross-section - **Excellent Fatigue Resistance:** Withstands cyclic loading in demanding environments - **Minimal Distortion:** Predictable dimensional changes during age hardening - **Superior Surface Finish:** Capable of achieving fine surface finishes after machining **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 (Solution Annealed & Aged):** | 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* **Available Specifications** **Diameter Range:** - Standard diameters: 0.125" to 12" (3 mm to 300 mm) - Special sizes available upon request **Lengths:** - Random mill lengths: 10-20 feet (3-6 meters) - Cut to specific lengths with precision ends **Surface Condition:** - Turned and polished - Centerless ground - Black finish **Tolerances:** - Standard: ±0.005" for diameters up to 1" - Precision: ±0.001" available for special orders **International Standards & Specifications** **Primary Standards:** - **AMS 6521G:** Maraging Steel 350 Bars, Forgings, and Rings - **ASTM A579/A579M:** Superstrength Alloy Steel Forgings - **MIL-S-8949:** Maraging Steel Plate, Sheet, and Strip **Quality Standards:** - **AMS 2301:** Aircraft Quality Steel Cleanliness - **AMS 2759/9:** Heat Treatment of Maraging Steels - **AMS 2631:** Ultrasonic Inspection **Product Applications** **Aerospace & Defense:** - Aircraft landing gear components - Rocket motor case segments - Missile guidance system parts - Helicopter rotor pins and shafts - Space vehicle structural members **Precision Tooling:** - Extrusion press rams and stems - Injection mold cores and cavities - Die-casting machine components - High-strength gears and shafts **Industrial Components:** - High-pressure cylinder rods - Nuclear reactor components - Precision machine tool spindles - High-strength fasteners and studs **Oil & Gas:** - Downhole tool components - Valve stems and trim parts - High-pressure fitting bodies **Fabrication & Processing** **Heat Treatment:** - **Solution Annealing:** 820°C ± 10°C (1500°F ± 20°F), air cool - **Age Hardening:** 480°C ± 5°C (900°F ± 10°F) for 3-6 hours - Stress relieving available for complex parts **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 **Quality Assurance** **Standard Testing:** - Chemical analysis certification - Mechanical property verification - Ultrasonic testing 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 **Packaging & Handling** - Individual protection of machined surfaces - Moisture-resistant wrapping - Proper support to prevent bending - Clear identification and labeling **Conclusion** Maraging 350/Vascomax® C350 Rod provides engineers and manufacturers with the highest level of strength and reliability for critical component fabrication. Its unique combination of machinability in the annealed condition and ultra-high strength after age hardening makes it the material of choice for applications where performance cannot be compromised. The consistent quality and proven performance of this material ensure its continued use in the world's most demanding engineering applications. --- **Note:** Vascomax® is a registered trademark of leading specialty steel manufacturers. All technical data subject to verification through certified testing. Consult manufacturing specifications 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 2652 gallon liquid totes Special package is available on request.