Maraging 350，Maraging C350 Rod，,E FORU

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

### **Technical Data Sheet: Maraging Steel 350 / Maraging C350 Rod** --- #### **1. Product Overview** **Maraging Steel C350 Rod** (commercially designated as **Maraging 350 Rod**) is a premium-grade round bar product manufactured from ultra-high-strength maraging steel, representing the highest strength grade in rod form with commercial optimization. This product maintains the exceptional mechanical properties of Maraging 350 alloy while providing enhanced machinability and consistent performance for the most demanding aerospace, defense, and tooling applications where maximum strength-to-weight ratio is critical. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Function | |---------|----------|----------|----------| | **Nickel (Ni)** | 18.00 | 19.00 | Matrix strengthening | | **Cobalt (Co)** | 11.50 | 12.50 | Solid solution strengthening | | **Molybdenum (Mo)** | 4.60 | 5.20 | Precipitation hardening | | **Titanium (Ti)** | 1.30 | 1.60 | Primary age-hardening | | **Aluminum (Al)** | 0.05 | 0.15 | Secondary age-hardening | | **Carbon (C)** | - | 0.03 | Impurity control | | **Iron (Fe)** | - | - | Balance | --- #### **3. Mechanical & Physical Properties** **A. Mechanical Properties (Aged Condition)** - **Tensile Strength:** 2,340-2,480 MPa (340-360 ksi) - **Yield Strength:** 2,240-2,380 MPa (325-345 ksi) - **Elongation:** 6-8% - **Reduction in Area:** 35-45% - **Hardness:** 56-60 HRC - **Fracture Toughness:** 35-50 MPa√m **B. Physical Properties** - **Density:** 8.10 g/cm³ - **Modulus of Elasticity:** 185 GPa - **Thermal Conductivity:** 17.0-19.0 W/m·K - **Thermal Expansion:** 10.2-10.7 × 10⁻⁶/°C --- #### **4. Product Specifications** **Rod Dimensions:** - **Diameter Range:** 5-250 mm (0.2-10 inches) - **Standard Lengths:** 3,000 & 4,000 mm (10' & 13') - **Diameter Tolerance:** h11 for standard precision - **Straightness:** ≤ 1.5 mm/m - **Surface Finish:** Turned, ground, or polished **Available Conditions:** - Annealed (32-36 HRC) - Aged (56-60 HRC) - Solution Treated --- #### **5. Applications** **Aerospace & Defense:** - Rocket motor case segments - Aircraft landing gear components - Missile body sections - Helicopter rotor shafts - Ordnance components **Tooling & Manufacturing:** - High-pressure die casting cores - Precision mold bases - Extrusion press components - Injection molding screws - Special fixture components **High-Performance Industrial:** - High-strength fasteners - Hydraulic cylinder rods - Test equipment shafts - Special machinery components --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6526 | Grade 350 Maraging Steel | | **ASTM** | A538 | Grade 350 | | **MIL** | S-46850 | Maraging Steel Grade 350 | --- #### **7. Heat Treatment Process** **Solution Annealing:** - **Temperature:** 820 ± 10°C (1,508 ± 18°F) - **Time:** 1 hour per 25 mm diameter - **Cooling:** Air cool - **Hardness:** 32-36 HRC **Aging Treatment:** - **Temperature:** 480 ± 5°C (896 ± 9°F) - **Time:** 3-6 hours - **Cooling:** Air cool - **Hardness:** 56-60 HRC --- #### **8. Machining & Fabrication** **Machining Guidelines:** - Machine in annealed condition (32-36 HRC) - Carbide tools with positive rake angles - Moderate speeds with adequate coolant - Proper tooling for threading operations **Finishing Operations:** - Grinding for final dimensional adjustment - EDM for complex geometries - Polishing for high surface finishes - Various surface treatments compatible --- #### **9. Quality Assurance** **Testing & Certification:** - Chemical analysis certification - Mechanical testing from samples - Ultrasonic testing available - Macroetch testing for internal soundness - Full traceability documentation **Quality Standards:** - Aerospace quality (AS9100) - Nadcap accredited - Military compliance - Statistical process control --- **Packaging & Handling:** - Protective end caps - Individual wrapping or wooden crating - Clear identification marking - Custom cutting services **Contact:** [Your Company Information] *Note: Maraging C350 Rod offers commercial optimization with enhanced machinability while maintaining the highest strength characteristics of the maraging steel family. All mechanical properties are typical for material in the fully aged condition. Properties may vary based on specific diameter and heat treatment parameters. Consult our technical team for application-specific recommendations.*

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 2639 gallon liquid totes Special package is available on request.