Maraging 350，Vascomax C350 Pipe，,E FORU

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

**Product Technical Specification: Maraging 350 / Vascomax® C350 Pipe** **Overview** Maraging 350/Vascomax® C350 Pipe is an ultra-high-strength, low-carbon martensitic steel pipe designed for critical applications requiring exceptional strength-to-weight ratio and reliability under extreme pressure and stress conditions. This product maintains the fundamental characteristics of the Maraging 350 alloy system while offering superior performance in tubular applications where failure is not an option. **Key Characteristics & Advantages** - **Ultra-High Pressure Containment:** Withstands extreme internal and external pressures - **Superior Strength-to-Weight Ratio:** Significant weight savings over conventional high-strength materials - **Excellent Fatigue Resistance:** Superior performance under cyclic loading conditions - **Outstanding Fracture Toughness:** High resistance to crack propagation - **Good Weldability and Fabricability:** Can be welded and formed in solution-annealed condition - **Minimal Distortion During Aging:** Predictable dimensional changes during heat treatment --- **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 | | **Hardness** | 54-57 HRC | Aged | | **Fracture Toughness (K_Ic)** | 55-80 MPa√m | Aged | *Solution-annealed condition: 28-32 HRC* --- **Product Specifications** **Size Range:** - **Outside Diameter:** 0.25" to 24" (6.35 mm to 610 mm) - **Wall Thickness:** 0.028" to 2.0" (0.71 mm to 50.8 mm) - **Length:** Standard 20 feet (6 meters), custom lengths available **Manufacturing Processes:** - Seamless pipe manufacturing - Welded and redrawn options - Precision honed and polished ID/OD surfaces **Tolerances:** - OD Tolerance: ±0.5% - Wall Thickness: ±10% - Straightness: 0.062" per foot maximum --- **International Standards & Specifications** **Material 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 **Pipe-Specific Standards:** - **ASTM A530/A530M:** General Requirements for Specialized Carbon and Alloy Steel Pipe - **AMS 2759/9:** Heat Treatment of Maraging Steels - **Customer-Specific Specifications** --- **Product Applications** **Aerospace & Defense:** - **Rocket Motor Cases:** Solid and liquid propellant systems - **Aircraft Hydraulic Systems:** High-pressure lines for flight controls - **Missile Body Structures:** Airframe and propulsion components - **Space Vehicle Propulsion:** Fuel and oxidizer lines **Oil & Gas:** - **Downhole Tools:** MWD/LWD tool bodies - **High-Pressure Flow Lines:** Subsea and surface applications - **Completion Equipment:** Premium connection components **Industrial Applications:** - **High-Pressure Accumulator Tubes** - **Hydraulic Cylinder Barrels** - **Process Industry Components:** For extreme service conditions - **Power Generation:** High-pressure steam and gas systems **Special Applications:** - **Nuclear Industry Components** - **Cryogenic Service Applications** - **High-Performance Automotive:** Fuel injection and hydraulic systems --- **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 **Machining & Welding:** - Optimal machining in solution-annealed condition - Welding recommended in annealed condition using matching filler metals - Post-weld aging required for full strength recovery - All standard welding methods applicable (GTAW, GMAW, PAW) --- **Quality Assurance** **Standard Testing:** - 100% Ultrasonic inspection per AMS 2631 - Hydrostatic pressure testing - Dimensional verification - Surface quality inspection - Chemical and mechanical property certification **Additional Quality Features:** - Full traceability from melt to finished pipe - Certified material test reports - Non-destructive examination records - Heat treatment certification --- **Conclusion** Maraging 350/Vascomax® C350 Pipe provides engineers with an unparalleled solution for high-pressure, high-stress applications where conventional materials are inadequate. Its unique combination of ultra-high strength, excellent toughness, and reliable performance makes it the material of choice for critical aerospace, defense, and industrial applications. The pipe's ability to be fabricated in the soft condition and then strengthened to the highest levels available ensures its position as a premium solution for demanding engineering challenges. --- **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 2654 gallon liquid totes Special package is available on request.