Elgiloy is a cobalt-chromium-nickel-molybdenum alloy offering a unique combination of ultra-high strength, excellent corrosion resistance, and exceptional fatigue life. With a nominal composition of 40% cobalt, 20% chromium, 15% nickel, and 7% molybdenum, this alloy maintains its properties from cryogenic temperatures up to 454°C (850°F). It is highly resistant to sulfide stress corrosion cracking (NACE MR0175/ISO 15156-3) and immune to crevice and pitting corrosion in seawater, making it the preferred material for critical springs, medical devices, and sour service components .
1. Product Specifications & Physical DataZYTC Alloy supplies UNS R30003 in precision forms for medical, aerospace, and oil & gas applications requiring verified mechanical properties and complete material traceability. Available Forms: Wire, strip, bar, and custom components . Specifications: AMS 5833, AMS 5834, AMS 5876, ASTM F1058, ISO 5832-7, ISO 15156-3 (NACE MR0175) .
| Chemical Composition (Weight %) | Elgiloy Specification |
|---|
| Cobalt (Co) | 39.0 - 41.0 | | Chromium (Cr) | 19.0 - 21.0 | | Nickel (Ni) | 14.0 - 16.0 | | Molybdenum (Mo) | 6.0 - 8.0 | | Iron (Fe) | Balance | | Manganese (Mn) | 1.50 - 2.50 | | Silicon (Si) | 1.20 max. | | Carbon (C) | 0.15 max. | | Beryllium (Be) | 0.10 max. | | Phosphorus (P) | 0.015 max. | | Sulfur (S) | 0.015 max. |
| Physical Properties | Metric | Imperial |
|---|
| Density | 8.3 g/cm³ | 0.300 lb/in³ | | Melting Point | 1427°C | 2600°F | | Modulus of Elasticity | 203 - 210 GPa | 29.5 - 30.5 × 10⁶ psi | | Modulus of Rigidity | 77 GPa | 11,168 ksi | | Coefficient of Expansion (20-100°C) | 12.5 µm/m·°C | 7.0 µin/in·°F |
| Mechanical Properties | Condition | Metric | Imperial |
|---|
| Tensile Strength | Annealed | 896 MPa | 130 ksi | | Yield Strength | Annealed | 448 MPa | 65 ksi | | Tensile Strength | Cold Worked + Aged | 1793 - 2206 MPa | 260 - 320 ksi | | Yield Strength | Cold Worked + Aged | 1379 - 1896 MPa | 200 - 275 ksi | | Elongation | Cold Worked + Aged | 2 - 8% | 2 - 8% |
2. Fabrication & Material ComparisonCold Working: Can be cold worked to achieve high strength; work-hardening rate significant . Heat Treatment: Age hardening after cold working develops optimum mechanical properties . Forming: Good formability in annealed condition; can be drawn, rolled, and formed . Material Comparison: vs. MP35N: Similar strength range; Elgiloy offers better spring properties and fatigue resistance . vs. 17-7PH: Superior corrosion resistance in sour and seawater environments . vs. Inconel X-750: Comparable strength; better corrosion resistance in chloride environments . vs. 316 Stainless: Significantly higher strength; superior corrosion resistance .
3. ApplicationsSprings: Critical springs for aerospace, medical devices, and instrumentation Torsion Bars: High-strength torsion components requiring fatigue resistance Seals: Metal seals for high-pressure and corrosive environments Medical Devices: Orthodontic wire, surgical instruments, implantable devices (ASTM F1058/ISO 5832-7) Oil & Gas: Downhole tools, valves, components for sour service Aerospace: Control cables, springs, fasteners
Contact ZYTC Alloy for certified Elgiloy (UNS R30003) materials with complete traceability, ASTM F1058/ISO 5832-7 specifications, technical datasheets, and competitive pricing on standard wire and strip sizes. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
