Maraging 250,Vascomax C250 Other/Similar Specs,UNS K92940,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 250 / Vascomax C250 & Similar Specifications (UNS K92940)** --- #### **1. Product Overview** The **Vascomax C250** family (commercially designated as **Maraging 250**, **UNS K92940**) 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, cost considerations, and manufacturing capabilities across global markets. --- #### **2. Chemical Composition Comparison (Weight %)** | Element | Vascomax C250 | 18Ni(250) | Custom 250 | International Equivalent | |---------|---------------|-----------|------------|------------------------| | **Nickel (Ni)** | 18.0-19.0 | 17.0-19.0 | 17.5-18.5 | 17.0-19.0 | | **Cobalt (Co)** | 7.0-7.5 | 7.0-8.5 | 7.2-7.8 | 7.0-8.5 | | **Molybdenum (Mo)** | 4.6-5.1 | 4.5-5.2 | 4.7-5.0 | 4.5-5.2 | | **Titanium (Ti)** | 0.4-0.5 | 0.3-0.5 | 0.35-0.45 | 0.3-0.5 | | **Aluminum (Al)** | 0.05-0.10 | 0.05-0.15 | 0.06-0.12 | 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 (%) | |-------|------------------------|----------------------|----------------| | **Vascomax C250** | 1,793-1,862 | 1,724-1,793 | 10-12 | | **18Ni(250)** | 1,724-1,793 | 1,655-1,724 | 10-14 | | **Custom 250** | 1,758-1,827 | 1,689-1,758 | 8-12 | | **International Equivalent** | 1,724-1,793 | 1,655-1,724 | 10-12 | **B. Toughness & Hardness** | Grade | Fracture Toughness (MPa√m) | Hardness (HRC) | Impact Strength (J) | |-------|----------------------------|----------------|---------------------| | **Vascomax C250** | 75-95 | 50-54 | 20-30 | | **18Ni(250)** | 70-90 | 48-52 | 25-35 | | **Custom 250** | 65-85 | 49-53 | 18-28 | | **International Equivalent** | 70-90 | 48-52 | 22-32 | --- #### **4. International Equivalents & Cross-References** **North American Standards:** - **UNS:** K92940 - **AMS:** 6512 - **ASTM:** A538 Grade 250 - **MIL-S:** 46850 - **Proprietary:** Vascomax C250 (Carpenter Technology) **European Standards:** - **DIN:** 1.6358 - **EN:** X2NiCoMo18-8-5 - **AFNOR:** Z3CNK18-10 - **British:** S 156 **Asian Standards:** - **JIS:** SUS 630 - **GB:** 00Ni18Co8Mo5Ti - **IS:** 5501 **Proprietary Grades:** - **VascoMax** 250 - **Carpenter** Custom 250 - **Aubert & Duval** AMS 6512 - **Saarstahl** VacoMax 250 --- #### **5. Application-Specific Variants** **Aerospace Grades:** - **AMS 6512:** Aircraft quality with enhanced fracture toughness - **Premium Quality:** Triple vacuum melted versions - **Enhanced Purity:** Improved cleanliness for critical applications **Tooling Grades:** - **Machining Enhanced:** Improved machinability variants - **Wear Resistant:** Enhanced surface hardness versions - **Dimensional Stable:** Reduced distortion formulations **Special Applications:** - **Corrosion Resistant:** Enhanced environmental performance - **High Temperature:** Modified for elevated temperature service - **Welding Grade:** Optimized weldability compositions - **Cost-Optimized:** Commercial grade alternatives --- #### **6. Selection Guidelines** **Grade Selection Criteria:** - **Maximum Strength:** Vascomax C250 - **Enhanced Toughness:** 18Ni(250) variants - **Cost Optimization:** Commercial C250 grades - **Special Requirements:** Custom compositions - **International Projects:** Regional equivalents **Application Matching:** | Application | Recommended Grade | Key Feature | |-------------|-------------------|-------------| | **Aircraft Components** | AMS 6512 | Certified aerospace quality | | **Tooling Applications** | Machining enhanced | Better machinability | | **Defense Systems** | Vascomax C250 | Optimal strength-toughness balance | | **Commercial Use** | Commercial C250 | Cost-effective performance | | **International Projects** | Regional equivalents | Local certification compliance | --- #### **7. Quality & Certification** **Standard Certifications:** - **Material Test Reports:** Chemical & mechanical properties - **Heat Treatment Certificates:** Process compliance documentation - **NDT Reports:** Ultrasonic, dye penetrant, magnetic particle - **Traceability:** Full material history and processing records **Special Certifications:** - **Aerospace:** AS9100, NADCAP accreditation - **Nuclear:** NQA-1 compliance - **Military:** MIL-STD requirements - **Medical:** ISO 13485 - **Automotive:** IATF 16949 --- #### **8. Technical Support Services** **Available Services:** - **Material Selection:** Application-specific recommendations - **Process Optimization:** Heat treatment and machining guidance - **Quality Planning:** Inspection and testing protocol development - **Technical Consulting:** Engineering support and failure analysis - **Training:** Material handling and processing education --- **Ordering Information:** - Standard and custom grades available - Complete documentation package provided - Global logistics and technical support - Custom alloy development services **Contact:** [Your Company Information] *Note: Vascomax is a registered trademark of Carpenter Technology Corporation. Specifications may vary between different manufacturers and specific product forms. Consult technical data sheets for precise application recommendations and property guarantees. Regional equivalents may have minor compositional variations while maintaining comparable performance characteristics.*

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 2609 gallon liquid totes Special package is available on request.