Maraging 250,Maraging C250 Other/Similar Specs,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 & Similar Specifications (UNS K92890)** --- #### **1. Product Overview** The **Maraging Steel 250** family (commercially designated as **Maraging C250**, **UNS K92890**) encompasses a range of ultra-high-strength martensitic age-hardening steels and their comparable alternatives. This product group includes various international equivalents, proprietary grades, and application-specific variants that offer similar or enhanced performance characteristics for different operational requirements and cost considerations. --- #### **2. Chemical Composition Comparison (Weight %)** | Element | Maraging 250/C250 | 18Ni(250) | Custom 250 | International Equivalent | |---------|-------------------|-----------|------------|------------------------| | **Nickel (Ni)** | 17.0-19.0 | 17.0-19.0 | 17.5-18.5 | 17.0-19.0 | | **Cobalt (Co)** | 7.0-8.5 | 7.0-8.5 | 7.5-8.0 | 7.0-8.5 | | **Molybdenum (Mo)** | 4.5-5.2 | 4.5-5.2 | 4.8-5.1 | 4.5-5.2 | | **Titanium (Ti)** | 0.3-0.5 | 0.3-0.5 | 0.4-0.5 | 0.3-0.5 | | **Aluminum (Al)** | 0.05-0.15 | 0.05-0.15 | 0.08-0.12 | 0.05-0.15 | | **Carbon (C)** | ≤0.03 | ≤0.03 | ≤0.02 | ≤0.03 | --- #### **3. Mechanical Properties Comparison** **A. Strength Properties (Aged Condition)** | Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |-------|------------------------|----------------------|----------------| | **Maraging 250** | 1,724-1,793 | 1,655-1,724 | 10-14 | | **Maraging C250** | 1,724-1,793 | 1,655-1,724 | 10-14 | | **18Ni(250)** | 1,724-1,793 | 1,655-1,724 | 10-14 | | **Enhanced 250** | 1,758-1,827 | 1,689-1,758 | 8-12 | **B. Toughness & Hardness** | Grade | Fracture Toughness (MPa√m) | Hardness (HRC) | Impact Strength (J) | |-------|----------------------------|----------------|---------------------| | **Maraging 250** | 70-90 | 48-52 | 25-35 | | **Maraging C250** | 70-90 | 48-52 | 25-35 | | **18Ni(250)** | 70-90 | 48-52 | 25-35 | | **Toughness Enhanced** | 90-110 | 46-50 | 35-45 | --- #### **4. International Equivalents & Cross-References** **North American Standards:** - **UNS:** K92890 - **AMS:** 6512 - **ASTM:** A538 Grade 250 - **MIL-S:** 46850 **European Standards:** - **DIN:** 1.6358 - **EN:** X2NiCoMo18-8-5 - **AFNOR:** Z3CNK18-10 **Asian Standards:** - **JIS:** SUS 630 - **GB:** 00Ni18Co8Mo5Ti **Proprietary Grades:** - **VascoMax:** 250 - **Carpenter:** Custom 250 - **Aubert & Duval:** AMS 6512 --- #### **5. Application-Specific Variants** **Aerospace Grades:** - **AMS 6512:** Aircraft quality - **Enhanced Purity:** Vacuum melted versions - **Premium Quality:** Enhanced fracture toughness **Tooling Grades:** - **Machining Enhanced:** Improved machinability - **Wear Resistant:** Enhanced surface properties - **Dimensional Stable:** Reduced distortion **Special Applications:** - **Corrosion Resistant:** Enhanced environmental performance - **High Temperature:** Modified for elevated temperature service - **Welding Grade:** Optimized weldability --- #### **6. Selection Guidelines** **Grade Selection Criteria:** - **Maximum Strength:** Standard Maraging 250/C250 - **Enhanced Toughness:** Toughness-enhanced variants - **Cost Optimization:** Commercial C250 grades - **Special Requirements:** Custom compositions **Application Matching:** | Application | Recommended Grade | Key Feature | |-------------|-------------------|-------------| | **Aircraft Components** | AMS 6512 | Certified quality | | **Tooling** | Machining enhanced | Better machinability | | **Defense** | Standard 250 | Balanced properties | | **Commercial** | C250 | Cost-effective | --- #### **7. Quality & Certification** **Standard Certifications:** - **Material Test Reports:** Chemical & mechanical properties - **Heat Treatment Certificates:** Process compliance - **NDT Reports:** Ultrasonic, dye penetrant - **Traceability:** Full material history **Special Certifications:** - **Aerospace:** AS9100, NADCAP - **Nuclear:** NQA-1 compliance - **Military:** MIL-STD requirements - **Medical:** ISO 13485 --- #### **8. Technical Support Services** **Available Services:** - **Material Selection:** Application-specific recommendations - **Process Optimization:** Heat treatment guidance - **Quality Planning:** Inspection and testing protocols - **Technical Consulting:** Engineering support --- **Ordering Information:** - Standard and custom grades available - Full documentation package - Technical support included - Global logistics support **Contact:** [Your Company Information] *Note: Specifications may vary between different manufacturers and specific product forms. Consult technical data sheets for precise application recommendations and property guarantees.*

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 2596 gallon liquid totes Special package is available on request.