Maraging 300，Maraging C300 Forgings，UNS K93160,E FORU

British Specs:，American Specs:AMS 6514 Bar, Tube and Forgings AMS 6521 Sheet, Strip and Plate MIL-S-46850 TYPE 4 ASTM A579 / AMS 6514 Powder，German Specs:WS 1.6354 WS 1.6358

### **Technical Data Sheet: Maraging Steel 300 / Maraging C300 Forgings (UNS K93160)** --- #### **1. Product Overview** **Maraging Steel C300 Forgings** (commercially designated as **Maraging 300 Forgings**, **UNS K93160**) represent the highest strength grade in the forged maraging steel product family with commercial optimization. These premium components are manufactured through controlled thermomechanical processing to achieve superior grain structure refinement and optimized directional strength characteristics. The forging process aligns metallic grain flow with component contours, resulting in exceptional strength, improved fatigue resistance, and superior structural integrity for the most demanding aerospace, defense, and energy applications. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Function | |---------|----------|----------|----------| | **Nickel (Ni)** | 18.00 | 19.00 | Matrix strengthening | | **Cobalt (Co)** | 8.50 | 9.50 | Solid solution strengthening | | **Molybdenum (Mo)** | 4.60 | 5.20 | Precipitation hardening | | **Titanium (Ti)** | 0.50 | 0.80 | 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:** 2,000-2,140 MPa (290-310 ksi) - **Yield Strength:** 1,930-2,070 MPa (280-300 ksi) - **Elongation:** 8-10% - **Reduction in Area:** 40-50% - **Hardness:** 52-56 HRC - **Fracture Toughness:** 50-70 MPa√m - **Impact Strength:** 15-25 J **B. Physical Properties** - **Density:** 8.00 g/cm³ - **Modulus of Elasticity:** 185 GPa - **Thermal Conductivity:** 18.0-20.0 W/m·K - **Thermal Expansion:** 10.4-10.9 × 10⁻⁶/°C --- #### **4. Forging Capabilities & Specifications** **Forging Types Available:** - Open Die Forgings - Closed Die Forgings - Precision Forgings - Upset Forgings - Rolled Ring Forgings **Size Ranges:** - **Weight Range:** 1-3,000 kg - **Maximum Dimensions:** 4,000 mm length - **Complexity:** High geometry complexity - **Tolerances:** Commercial and precision grades --- #### **5. Applications** **Aerospace & Defense:** - Rocket motor cases - Aircraft landing gear components - Missile structural members - Helicopter rotor components - Space vehicle structures **Energy & Industrial:** - Oil and gas drilling components - Nuclear reactor parts - High-performance racing components - Heavy machinery components - Tooling applications --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6514 | Bars, Forgings, and Tubing | | **ASTM** | A538 | Grade 300 | | **UNS** | K93160 | Unified Numbering System | | **MIL** | S-46850 | Maraging Steel Grade 300 | --- #### **7. Manufacturing Process** **Forging Sequence:** 1. Material Preparation 2. Heating 3. Forging 4. Heat Treatment 5. Machining 6. Inspection **Heat Treatment:** - **Solution Treatment:** 820 ± 10°C, air cool - **Aging Treatment:** 480 ± 5°C, 3-8 hours - **Cooling:** Air cool - **Microstructure:** Fine-grained martensite --- #### **8. Quality Assurance** **Testing & Certification:** - Ultrasonic Testing - Chemical Analysis - Mechanical Testing - Macroetch Testing - Dimensional Verification **Quality Standards:** - Nadcap Accredited - Aerospace Quality (AS9100) - Military Compliance - Statistical Process Control --- #### **9. Technical Advantages** **Forging Benefits:** - Superior Grain Flow - Improved Integrity - Better Fatigue Life - Material Efficiency - Design Flexibility --- **Ordering Information:** - Custom shapes and sizes - Prototype development - Complete manufacturing - Technical support **Contact:** [Your Company Information] *Note: Maraging C300 Forgings offer commercial optimization with enhanced manufacturability while maintaining the highest strength characteristics of the maraging steel family. All mechanical properties typical for aged condition. Forgings normally supplied rough or finished machined. Consult engineering for 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 2634 gallon liquid totes Special package is available on request.