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UNS R30188 Standard Specification Overview

The UNS R30188 is a standardized material designation under the Unified Numbering System (UNS), which categorizes alloys and metals for industrial use. This specification outlines the chemical composition, mechanical properties, and application guidelines for materials designated under this code.

Chemical Composition

The UNS R30188 alloy is primarily composed of cobalt, chromium, and tungsten, with trace amounts of other elements to enhance specific properties. Below is a general breakdown of its composition:

• Cobalt (Co): 50-60%
• Chromium (Cr): 20-25%
• Tungsten (W): 10-15%
• Other Elements: Carbon, nickel, and iron in minor quantities

Mechanical Properties

UNS R30188 is known for its high-temperature strength, corrosion resistance, and wear resistance. Key mechanical properties include:

• Tensile Strength: 1200-1500 MPa
• Yield Strength: 800-1000 MPa
• Elongation: 5-10%
• Hardness: 35-45 HRC

Applications

Due to its exceptional properties, UNS R30188 is widely used in demanding environments, including:

• Aerospace components (e.g., turbine blades)
• Medical implants (e.g., orthopedic devices)
• Industrial cutting tools
• High-temperature valves and fittings

Standards and Compliance

UNS R30188 complies with several international standards, ensuring its suitability for critical applications. These include:

• ASTM F75: Standard for cobalt-chromium-molybdenum alloys
• ISO 5832-4: Implantable materials specification
• AMS 5385: Aerospace material standard

Understanding the UNS R30188 specification is essential for engineers and manufacturers to ensure proper material selection and performance in high-stress applications.