Wironit Extrahart, Cobalt-Chromium Partial Denture Alloy

Wironit® Extrahart is a cobalt-chromium alloy specially developed for partial denture frameworks, providing outstanding strength and biocompatibility. With its excellent casting properties and low thermal conductivity, this alloy offers exceptional performance and wearing comfort for dental prostheses.

Key Benefits for Dental Technicians:

• High Strength for Combination Work: Thanks to its high proof strength (515 MPa) and ultimate tensile strength (900 MPa), Wironit® Extrahart is ideally suited for combination work, ensuring durability and stability in partial denture frameworks.
• Superior Casting Properties: The alloy’s special composition, including silicon and carbon, results in excellent casting properties, making it easier to work with and ensuring precise results.
• Low Thermal Conductivity for Comfort: The low thermal conductivity of Wironit® Extrahart enhances the wearing comfort of the prosthesis, reducing sensitivity to temperature changes for the patient.
• Biocompatible and Corrosion-Resistant: The alloy is biocompatible and highly resistant to corrosion, ensuring long-lasting and safe use for dental restorations.

Technical Specifications:

• Product Name: Wironit® Extrahart
• Type: Cobalt-Chromium Partial Denture Alloy
• Content: 1 kg pack
• Composition: Co 63.0%, Cr 30.0%, Mo 5.0%, Si 1.0%, Mn 1.0%, C
• Base Metal: Cobalt
• Preheat Temperature: 950°C to 1050°C
• Casting Temperature: 1420°C
• Solidus Temperature: 1270°C
• Liquidus Temperature: 1400°C
• Vickers Hardness: 385 HV10
• Yield Strength: 515 MPa
• Elongation at Break: 7%
• Density: 8.2 g/cm³
• Elastic Modulus: 238 GPa
• Tensile Strength: 900 MPa
• ISO Type: ISO 22674 Type 5

Wironit® Extrahart is the perfect solution for dental technicians seeking a high-strength, biocompatible alloy for partial dentures. Its casting properties, durability, and patient comfort make it a reliable choice for creating long-lasting dental restorations.