Maraging 250,Maraging C250 Foil,Shim,UNS K92890,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

### **Technical Data Sheet: Maraging Steel 250 / Maraging C250 Foil & Shim (UNS K92890)** --- #### **1. Product Overview** **Maraging Steel 250 Foil & Shim** (commercially designated as **Maraging C250 Foil & Shim**, **UNS K92890**) are precision-engineered thin-gauge products manufactured from ultra-high-strength maraging steel. These products maintain the exceptional mechanical properties of Maraging 250 alloy in extremely thin cross-sections, providing ideal solutions for applications requiring high strength, dimensional stability, and precise thickness control in weight-critical and space-constrained environments. --- #### **2. Chemical Composition (Weight %)** | Element | Min (%) | Max (%) | Function | |---------|----------|----------|----------| | **Nickel (Ni)** | 17.00 | 19.00 | Austenite stabilization | | **Cobalt (Co)** | 7.00 | 8.50 | Strengthening | | **Molybdenum (Mo)** | 4.50 | 5.20 | Precipitation hardening | | **Titanium (Ti)** | 0.30 | 0.50 | 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:** 1,724-1,793 MPa (250-260 ksi) - **Yield Strength:** 1,655-1,724 MPa (240-250 ksi) - **Elongation:** 8-12% - **Hardness:** 48-52 HRC - **Fatigue Strength:** Excellent in thin sections **B. Physical Properties** - **Density:** 8.00 g/cm³ - **Modulus of Elasticity:** 185 GPa - **Thermal Expansion:** 10.5-11.0 × 10⁻⁶/°C - **Thermal Conductivity:** 19.0-21.0 W/m·K --- #### **4. Product Specifications** **Foil Specifications:** - **Thickness Range:** 0.025-0.50 mm (0.001-0.020 inches) - **Width Range:** 50-300 mm (2-12 inches) - **Standard Length:** Coils up to 1000 meters - **Thickness Tolerance:** ±0.0025 mm (precision grade) **Shim Specifications:** - **Thickness Range:** 0.50-3.00 mm (0.020-0.118 inches) - **Width Range:** 100-600 mm (4-24 inches) - **Standard Forms:** Sheets, strips, custom blanks - **Thickness Tolerance:** ±0.005 mm (precision grade) **Surface Finish Options:** - Bright annealed - Matte finish - Ground surface - Special coatings available --- #### **5. Applications** **Aerospace & Aviation:** - Aircraft structural shims - Control surface gap management - Engine mounting shims - Avionics mounting components - Satellite precision spacers **Defense & Military:** - Weapon system precision shims - Armor system spacing components - Optical system shims - Guidance system foil components - Electronic shielding foils **Precision Engineering:** - High-performance spring foils - Instrumentation precision shims - Bearing pre-load spacers - Optical mounting shims - Laboratory equipment components --- #### **6. Standards & Specifications** | Organization | Standard | Description | |--------------|----------|-------------| | **AMS** | 6512 | Material Specification | | **ASTM** | A538 | Grade 250 | | **ASTM** | A693 | Precipitation-Hardening Steel | | **MIL** | S-46850 | Maraging Steel Grade 250 | --- #### **7. Processing Characteristics** **Heat Treatment:** - **Solution Annealing:** 820°C ± 8°C, air cool - **Aging Treatment:** 480°C ± 5°C, 1-3 hours - **Resulting Hardness:** 48-52 HRC (aged) **Forming & Fabrication:** - **Bend Radius:** Minimum 1x material thickness (foil) - **Stamping:** Excellent in annealed condition - **Punching:** Clean edges with proper tooling - **Flatness:** Excellent dimensional stability --- #### **8. Quality Assurance** **Testing & Certification:** - **Dimensional Verification:** Laser micrometer - **Surface Quality:** 100% visual inspection - **Thickness Mapping:** Continuous scanning - **Mechanical Testing:** Sample testing per lot - **Certification:** Full material traceability **Special Features:** - Burr-free edges - Controlled surface roughness - Consistent flatness - Clean manufacturing environment --- #### **9. Packaging & Handling** **Standard Packaging:** - Protective interleaving between layers - Moisture-resistant wrapping - Static-dissipative packaging (electronic applications) - Custom slitting and blanking services **Handling Instructions:** - Store in dry environment - Handle with clean gloves - Avoid sharp bending before forming - Protect from surface contamination --- **Ordering Information:** - Available in standard and custom sizes - Various surface finishes offered - Technical support available - Quick delivery options **Contact:** [Your Company Information] *Note: Foil and shim products are normally supplied in annealed condition for forming operations. Final aging treatment should be performed after all fabrication processes are completed. Consult technical team for specific application 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 2597 gallon liquid totes Special package is available on request.