ASTM F1058 specifies the requirements for wrought cobalt-chromium-nickel-molybdenum alloy (UNS R30003) used in dental orthodontic wire applications. This non-magnetic superalloy offers a unique combination of very high strength, excellent formability, outstanding corrosion resistance, and exceptional fatigue strength. Its ability to achieve additional strength increases of up to 25% through aging of cold-reduced material makes it the preferred choice for orthodontic archwires, springs, and other dental appliances requiring precise force delivery and long-term reliability in the oral environment .
1. Product Specifications & Physical DataUNS R30003 is available in wire form for orthodontic and dental applications. The alloy is typically supplied in the annealed, cold-worked, or cold-worked and aged condition depending on the required mechanical properties. Available Forms: Wire, strip, bar, and custom components . Specifications: ASTM F1058, ISO 5832-7, AMS 5833/5834, UNS R30003 .
| Chemical Composition (Weight %) | UNS R30003 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) | 1.5 - 2.5 | | Carbon (C) | 0.15 max. | | Silicon (Si) | 1.20 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 | | Electrical Resistivity | 0.98 µΩ·m | 0.98 µΩ·m | | Magnetic Permeability | < 1.01 | < 1.01 |
| Mechanical Properties | Annealed | Cold-Worked | Cold-Worked + Aged |
|---|
| Tensile Strength (min.) | 896 MPa (130 ksi) | 1379 - 1655 MPa (200 - 240 ksi) | 1724 - 2068 MPa (250 - 300 ksi) | | Yield Strength (min.) | 448 MPa (65 ksi) | 1034 - 1379 MPa (150 - 200 ksi) | 1379 - 1896 MPa (200 - 275 ksi) | | Elongation (min.) | 45% | 5 - 15% | 2 - 8% | | Hardness (max.) | 25 HRC | 40 - 45 HRC | 45 - 55 HRC |
2. Operating Conditions & Selection CriteriaUNS R30003 is specified for dental orthodontic wire applications requiring high strength, formability, corrosion resistance, and fatigue performance in the oral environment. Biocompatibility: Approved per ASTM F1058 and ISO 5832-7 for dental applications; excellent corrosion resistance in saliva and oral fluids . Corrosion Resistance: Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing oral environments . Non-Magnetic: Low magnetic permeability (< 1.01) ensures patient comfort and compatibility with dental imaging . Strengthening Mechanism: Solid-solution strengthened with additional strengthening through cold work and aging; can achieve up to 25% strength increase over cold-worked condition through age hardening . Formability: Excellent ductility in annealed condition allows precise bending and shaping for custom orthodontic appliances . Fatigue Strength: Exceptional high-cycle fatigue life essential for orthodontic wires subjected to repeated oral movements .
3. Fabrication & Material ComparisonAnnealing: 1093-1177°C (2000-2150°F), rapid cool; produces soft, formable condition . Cold Working: Work-hardening rate moderate; can be cold drawn to high strength levels . Aging: 482-593°C (900-1100°F) × 4-8 hours, air cool; develops additional strength (up to 25% increase) after cold work . Forming: Excellent formability in annealed condition; can be bent, twisted, and shaped without cracking . Welding: Good weldability using GTAW and resistance welding; suitable for complex appliance fabrication .
| Material Comparison | UNS R30003 (ASTM F1058) | UNS R30035 (ASTM F562) | ASTM F138 (316L) | NiTi (Nitinol) |
|---|
| Tensile Strength (max.) | 300 ksi (aged) | 260 ksi (aged) | 90 ksi | 200 ksi (superelastic) | | Modulus of Elasticity | 205 GPa | 230 GPa | 193 GPa | 28-83 GPa (temp dependent) | | Formability | Excellent | Moderate | Good | Limited | | Corrosion Resistance | Excellent | Excellent | Good | Excellent | | Non-Magnetic | Yes | Yes | Yes | Yes | | Springback | High | High | Moderate | Very High | | Primary Use | Orthodontic wires, springs | High-strength implants | Temporary implants | Superelastic wires |
4. ApplicationsOrthodontic Archwires: Primary, intermediate, and finishing wires for tooth movement Orthodontic Springs: Coil springs, open and closed springs for precise force delivery Retainers & Appliances: Palatal expanders, space maintainers, and habit appliances Dental Instruments: Forceps, pliers, and precision instruments requiring corrosion resistance Surgical Sutures: Fine wire for dental and maxillofacial procedures Cardiovascular: Guidewires, stents, and embolization coils (non-dental applications)
Contact ZYTC Alloy for certified ASTM F1058 UNS R30003 dental orthodontic wire with complete traceability, EN 10204 3.1/3.2 certificates, and competitive pricing. Available in annealed, cold-worked, and aged conditions to meet your orthodontic appliance manufacturing requirements. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
