Maraging 350，Vascomax C350 Other/Similar Specs，,E FORU

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

**Product Name:** Maraging 350 / Vascomax® C350 & Related Specifications **Material Type:** Ultra-High-Strength Maraging Steel Family **Standard:** AMS 6521, AMS 6519, ASTM A579, MIL-S-8949 --- ### **Overview** The Maraging 350 (Vascomax® C350) material system represents the premium grade within the 18% nickel maraging steel family, offering multiple product forms and specifications to meet diverse application requirements. This comprehensive range maintains the fundamental metallurgical characteristics while providing tailored solutions for specific performance needs across various industries. --- ### **Material Family Characteristics** - **18% Nickel Maraging Series:** Part of the 200, 250, 300, and 350 ksi yield strength progression - **Precipitation Hardening System:** Utilizes intermetallic compound formation for strengthening - **Low-carbon Martensitic Structure:** Provides inherent toughness and ductility - **Heat Treatable:** Achieves final properties through simple aging treatment --- ### **Chemical Composition Comparison (Typical Weight %)** | Element | Maraging 350 | Maraging 300 | Maraging 250 | |---------|-------------|-------------|-------------| | Nickel (Ni) | 18.0-19.0 | 18.0-19.0 | 17.0-19.0 | | Cobalt (Co) | 11.5-12.5 | 8.5-9.5 | 7.0-8.5 | | Molybdenum (Mo) | 4.6-5.2 | 4.6-5.2 | 4.6-5.2 | | Titanium (Ti) | 1.3-1.6 | 0.5-0.8 | 0.3-0.5 | | Carbon (C) | ≤0.03 | ≤0.03 | ≤0.03 | --- ### **Physical & Mechanical Properties Comparison** #### **Physical Properties** - **Density:** 8.10 g/cm³ (0.292 lb/in³) - **Melting Range:** 1400-1420°C (2550-2590°F) - **Thermal Conductivity:** 19.0 W/m·K at 20°C - **Electrical Resistivity:** 0.70 μΩ·m at 20°C #### **Mechanical Properties by Grade** | Property | Grade 250 | Grade 300 | Grade 350 | |----------|------------|------------|------------| | Yield Strength (MPa) | 1720-1790 | 2000-2100 | 2340-2410 | | Tensile Strength (MPa) | 1790-1860 | 2070-2170 | 2450-2550 | | Elongation (%) | 10-14 | 9-12 | 8-12 | | Fracture Toughness (MPa√m) | 90-110 | 70-90 | 55-80 | | Hardness (HRC) | 48-50 | 52-54 | 54-57 | --- ### **Related Specifications & Designations** #### **International Standards** - **AMS 6521G:** Maraging Steel 350 Bars, Forgings, and Rings - **AMS 6519:** Maraging Steel 250 Sheet, Strip, and Plate - **ASTM A579/A579M:** Superstrength Alloy Steel Forgings - **MIL-S-8949:** Maraging Steel Plate, Sheet, and Strip #### **Proprietary Designations** - **Vascomax® C350:** Premium commercial designation - **Vascomax® C300:** Intermediate strength grade - **Vascomax® T250:** Standard commercial grade - **UNS K89320:** Unified Numbering System --- ### **Specialized Product Forms** #### **Standard Product Forms** - Bar and Rod Stock - Sheet and Plate - Strip and Foil - Tubing and Pipe - Forgings and Billets - Wire and Special Shapes #### **Special Conditions** - Solution Annealed (for machining/fabrication) - Age Hardened (full strength) - Stress Relieved - Special Surface Conditions --- ### **Applications by Industry** #### **Aerospace & Defense** - Rocket motor cases and launch vehicle components - Aircraft landing gear and critical structural elements - Missile bodies and guidance system components - Spacecraft structural framework #### **Tooling & Industrial** - Precision molds and dies for injection molding - Extrusion press rams and containers - High-strength gears and shafts - Machine tool components #### **Nuclear & Energy** - Centrifuge components - Pressure vessel applications - High-strength fasteners and connectors #### **Emerging Applications** - Additive manufacturing powders - High-performance automotive components - Advanced sporting equipment - Medical implant devices (special grades) --- ### **Heat Treatment Characteristics** #### **Solution Treatment** - Temperature: 820°C ± 10°C (1500°F ± 20°F) - Time: 1 hour per 25mm of thickness - Cooling: Air cool or faster #### **Aging Treatment** - Temperature: 480°C ± 5°C (900°F ± 10°F) - Time: 3-6 hours typically - Cooling: Air cool --- ### **Fabrication Notes** #### **Machining** - Best performed in solution-annealed condition - Requires rigid setups and sharp tooling - Produces continuous chips #### **Welding** - Can be welded in annealed condition - Requires matching or over-matching filler metals - Post-weld aging required for full strength #### **Forming** - Good formability in annealed condition - Springback considerations important - Requires power tools for cutting --- ### **Quality Assurance & Testing** #### **Standard Testing** - Chemical analysis verification - Mechanical property testing - Non-destructive examination - Microstructural evaluation - Fracture toughness testing (when specified) #### **Certification Requirements** - Material test reports - Heat treatment certification - Non-destructive testing reports - Traceability documentation --- ### **Technical Support Services** - Material selection assistance - Heat treatment optimization - Fabrication process development - Failure analysis and troubleshooting - Customized testing protocols --- ### **Conclusion** The Maraging 350/Vascomax C350 material system and its related specifications offer the highest strength-to-toughness combination in the commercial maraging steel family. Understanding the complete range of specifications and product forms enables optimal material selection based on specific application requirements, balancing strength, toughness, cost, and availability across various industrial sectors. --- **Note:** This specification covers general characteristics of the Maraging 350 material system. Specific requirements should be confirmed with appropriate standard documentation and material certifications. Vascomax® is a registered trademark of leading specialty steel manufacturers.

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 2661 gallon liquid totes Special package is available on request.