Maraging 300,Udimar 300 Plate,UNS K93120,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 / Udimar 300 Plate (UNS K93120)** --- #### **1. Product Overview** **Maraging Steel 300 Plate** (commercially known as **Udimar 300 Plate**, **UNS K93120**) is a flat-rolled product manufactured from ultra-high-strength maraging steel, designed for applications requiring the highest strength-to-weight ratio in large surface areas. This product combines the exceptional mechanical properties of Maraging 300 alloy with the dimensional stability of plate manufacturing, providing optimal solutions for structural components, tooling applications, and defense systems where maximum strength and flatness are critical. --- #### **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% - **Hardness:** 52-56 HRC - **Fracture Toughness:** 50-70 MPa√m - **Impact Toughness:** 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. Product Specifications** **Plate Dimensions:** - **Thickness Range:** 6-150 mm (0.25-6 inches) - **Width Range:** 600-1,200 mm (24-48 inches) - **Length Range:** 1,200-3,000 mm (48-120 inches) - **Thickness Tolerance:** ±0.1 to ±0.5 mm - **Flatness:** ≤ 3 mm/m - **Surface Finish:** Hot-rolled, annealed, and descaled **Available Conditions:** - Annealed (32-36 HRC) - Solution Treated - Aged (52-56 HRC) --- #### **5. Applications** **Aerospace & Defense:** - Rocket motor case segments - Aircraft structural components - Missile launch platforms - Helicopter armor systems - Ordnance protective structures **Tooling & Manufacturing:** - Precision mold bases - Die-casting machine platens - Injection molding templates - Fixture plates - Test equipment frames **Industrial Applications:** - High-performance racing components - Hydraulic press frames - Nuclear reactor components - Marine applications - Special vehicle armor --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6514 | Bars, Forgings, and Tubing | | **ASTM** | A538 | Grade 300 | | **ASTM** | A693 | Precipitation-Hardening Steel Plate | | **UNS** | K93120 | Unified Numbering System | --- #### **7. Heat Treatment Process** **Solution Annealing:** - **Temperature:** 820 ± 10°C (1,508 ± 18°F) - **Time:** 1 hour per 25 mm thickness - **Cooling:** Air cool - **Hardness:** 32-36 HRC **Aging Treatment:** - **Temperature:** 480 ± 5°C (896 ± 9°F) - **Time:** 3-8 hours - **Cooling:** Air cool - **Hardness:** 52-56 HRC --- #### **8. Machining & Fabrication** **Machining Guidelines:** - Machine in annealed condition - Carbide tools with positive rake angles - Moderate speeds with adequate coolant - Special fixturing for large components **Fabrication Advantages:** - Minimal distortion during aging - Good machinability in annealed condition - Excellent weldability - Maintains flatness after heat treatment --- #### **9. Quality Assurance** **Testing & Certification:** - Chemical analysis certification - Mechanical testing - Ultrasonic testing - Flatness verification - Full traceability **Quality Standards:** - Aerospace quality (AS9100) - Nadcap accredited - Military compliance - Statistical process control --- **Packaging & Handling:** - Protective coating - Wooden crating - Clear identification - Custom cutting services **Contact:** [Your Company Information] *Note: All mechanical properties are typical for material in the fully aged condition. Properties may vary based on specific plate thickness and heat treatment parameters. Consult 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 2617 gallon liquid totes Special package is available on request.