Maraging 350，Vascomax C350 Bar(Round bar, Flat bar)，,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, commercially known as **Vascomax® C350 Rod**, is an ultra-high-strength, low-carbon martensitic steel supplied in round bar form. It belongs to the 18% nickel maraging steel family and achieves a nominal yield strength of **350 ksi (≈2413 MPa)** through a unique age-hardening heat treatment. This material is specifically engineered for machining critical components where the highest strength-to-weight ratio, exceptional toughness, and reliable performance under extreme conditions are required. --- **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 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: Material is supplied in solution-annealed condition (28-32 HRC) for machining.* --- **Heat Treatment** 1. **Solution Annealing:** 820°C ± 10°C (1500°F ± 20°F) for 1 hour per 25 mm thickness, air cool. 2. **Age Hardening:** 480°C ± 5°C (900°F ± 10°F) for 3-6 hours, air cool. --- **International Standards & Specifications** - **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 - **AMS 2301:** Aircraft Quality Steel Cleanliness - **AMS 2759/9:** Heat Treatment of Maraging Steels --- **Product Applications** Maraging 350/Vascomax C350 Rod is utilized in the most demanding applications across multiple industries: **Aerospace & Defense:** - Aircraft landing gear components - Rocket motor cases and missile bodies - Helicopter rotor pins and shafts - Space vehicle structural members **Precision Tooling & Industrial:** - Extrusion press rams and stems - Injection molding machine components - High-strength gears and shafts - Die-casting cores and cavities **Oil & Gas:** - Downhole tool components - High-pressure valve stems - Drill string components **Special Applications:** - Nuclear reactor components - High-performance fasteners - Critical medical device components --- **Fabrication Notes** - **Machining:** Excellent machinability in annealed condition; use sharp tools and positive rake angles. - **Welding:** Weldable in annealed condition using matching filler metals; requires post-weld aging. - **Grinding:** Responds well to conventional grinding operations. --- **Quality Assurance** - Full traceability from melt to final product - Ultrasonic testing per AMS 2631 - Chemical and mechanical property certification - Macro-etch testing for soundness --- **Conclusion** Maraging 350/Vascomax® C350 Rod represents the pinnacle of ultra-high-strength steel technology, offering an unmatched combination of strength, toughness, and manufacturability. Its ability to be precision-machined in the soft condition and then transformed into one of the world's strongest materials makes it indispensable for critical applications in aerospace, defense, and high-performance industrial sectors. --- *Vascomax® is a registered trademark of leading specialty steel manufacturers. Properties may vary based on specific manufacturing processes and heat treatment parameters. Always consult certified test reports for critical applications.*

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 2653 gallon liquid totes Special package is available on request.