Maraging 250,Udimar 250 Fittings,,E FORU

British Specs:BS S162，American Specs:AMS 6512 Bar, Tube, Forgings AMS 6520 Sheet, Strip and Plate ASTM A646 MIL-S-46850 Type 3，German Specs:WS 1.6359

### **Product Datasheet: Maraging Steel 250 / Udimar 250 Fittings** --- #### **1. Product Overview** **Maraging Steel 250 Fittings** (commercially known as **Udimar 250 Fittings**) are precision-engineered components manufactured from ultra-high-strength maraging steel, designed for critical connection and transition points in high-performance fluid and structural systems. These fittings maintain the exceptional strength-toughness combination of Maraging 250 alloy in ready-to-install configurations, providing reliable performance in aerospace, defense, and energy applications where failure is not an option. Available in various standardized and custom geometries to meet specific system requirements. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Balance | |---------|----------|----------|---------| | **Nickel (Ni)** | 17.00 | 19.00 | - | | **Cobalt (Co)** | 7.00 | 8.50 | - | | **Molybdenum (Mo)** | 4.50 | 5.20 | - | | **Titanium (Ti)** | 0.30 | 0.50 | - | | **Aluminum (Al)** | 0.05 | 0.15 | - | | **Iron (Fe)** | - | - | Balance | | **Carbon (C)** | - | 0.03 | - | | **Manganese (Mn)** | - | 0.10 | - | | **Silicon (Si)** | - | 0.10 | - | | **Sulfur (S)** | - | 0.01 | - | | **Phosphorus (P)** | - | 0.01 | - | --- #### **3. Physical & Mechanical Properties** **A. Mechanical Properties (After Solution Annealing & Aging)** - **Tensile Strength:** 1,720 - 1,790 MPa (250 - 260 ksi) - **Yield Strength (0.2% Offset):** 1,655 - 1,725 MPa (240 - 250 ksi) - **Elongation:** 10 - 12% - **Reduction in Area:** 45 - 55% - **Hardness:** 48 - 52 HRC - **Fracture Toughness (K_Ic):** 70 - 90 MPa√m - **Pressure Rating:** Suitable for systems up to 10,000 psi **B. Physical Properties** - **Density:** 8.00 g/cm³ (0.289 lb/in³) - **Modulus of Elasticity:** 185 GPa (26.8 × 10⁶ psi) - **Poisson's Ratio:** 0.30 - **Thermal Conductivity:** 19.0 - 21.0 W/m·K - **Thermal Expansion Coefficient:** 10.5 - 11.0 × 10⁻⁶/°C (20 - 100°C) - **Electrical Resistivity:** 0.60 - 0.65 μΩ·m --- #### **4. Product Applications** **Aerospace & Aviation** - **Rocket propulsion** system fittings - **Aircraft hydraulic** system connectors - **Space vehicle** fluid system components - **Helicopter hydraulic** line fittings - **Fuel system** high-pressure connectors **Defense Applications** - **Weapon system** hydraulic fittings - **Armor vehicle** fluid system components - **Missile system** pressure fittings - **Military aircraft** high-pressure connectors - **Naval vessel** specialized fittings **High-Performance Industrial** - **Racing hydraulic** system components - **High-pressure test** equipment fittings - **Energy industry** specialized connectors - **Process industry** high-pressure fittings - **Research equipment** precision fittings --- #### **5. Available Fitting Types** **Connection Styles** - MS (Military Standard) flareless fittings - AN (Army-Navy) flared fittings - JIC 37° flare fittings - ORFS (O-Ring Face Seal) fittings - Metric and ISO standard fittings - NPT and BSP threaded fittings **Standard Product Range** - **Elbows:** 45°, 90°, 120° - **Tees:** Straight, reducing, and cross types - **Unions:** Straight, bulkhead, and reducing - **Adapters:** Male/female combinations - **Caps and Plugs:** Various thread types - **Special Fittings:** Custom engineered solutions --- #### **6. International Standards & Specifications** | Standard Body | Specification Number | Title/Description | |---------------|----------------------|-------------------| | **AMS** | AMS 6512 | Steel Bars, Forgings, and Tubing 18Ni (250) | | **ASTM** | A538 | Standard Specification for Precipitation-Hardening Steel | | **UNS** | K92890 | Unified Numbering System Designation | | **MIL** | MIL-S-46850 | Steel, Maraging 250 Grade | | **SAE** | AS4841 | Dash Size and Identification | | **ISO** | 8434 | Metallic tube connections for fluid power | --- #### **7. Manufacturing & Quality Assurance** **Manufacturing Process** - **Raw Material:** Premium vacuum melted stock - **Machining:** CNC turning and milling from annealed condition - **Heat Treatment:** Final aging after machining completion - **Surface Treatment:** Passivation per AMS-QQ-P-35 - **Testing:** 100% proof pressure testing - **Marking:** Permanent identification per requirements **Quality Assurance** - **Material Certification:** Full traceability to melt source - **Dimensional Verification:** 100% inspected to drawing requirements - **Pressure Testing:** 1.5x working pressure minimum - **Surface Inspection:** 100% visual examination - **NDT:** Magnetic particle or dye penetrant inspection - **Lot Control:** Complete manufacturing history maintained --- #### **8. Technical Advantages** **Performance Benefits** - **Weight Reduction:** 35-40% lighter than equivalent steel fittings - **Pressure Capability:** Suitable for ultra-high pressure systems - **Corrosion Resistance:** Superior to conventional steel fittings - **Fatigue Life:** Excellent performance under cyclic loading - **Temperature Range:** -54°C to +400°C (-65°F to +752°F) **Reliability Features** - **Leak-Free Performance:** Precision machined sealing surfaces - **Vibration Resistance:** Maintains integrity under dynamic loads - **Long Service Life:** Exceptional wear and corrosion resistance - **Consistent Quality:** Statistical process control maintained - **Technical Support:** Comprehensive application engineering --- **Installation & Maintenance:** - Proper installation tools and procedures required - Torque specifications provided with each fitting - Compatibility with system fluids must be verified - Regular inspection recommended for critical applications **Contact Information:** [Your Company Information] *Note: All specifications are subject to change without notice. Fittings are supplied ready for installation in fully heat-treated condition. Consult factory for current technical data and application-specific recommendations. Custom configurations and special requirements accommodated with advanced notice.*

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 2581 gallon liquid totes Special package is available on request.