According to ASME B30.26, each new link, ring, and swivel shall be marked by the manufacturer to show which of the following?

• A. Date of manufacture
• B. Size or rated load
• C. Serial number
• D. Material grade

Answer: (D)

Marking identifies the material grade. This tells you the metal’s specification—its alloy composition and heat treatment—which directly determine strength, fatigue resistance, and overall performance of the part. Knowing the material grade helps ensure the link, ring, or swivel will handle the intended load, is compatible with other components, and can be replaced with an appropriate grade if needed. While other details like date of manufacture or serial numbers can aid traceability, and size or rated load is important for use, the required manufacturer marking in this standard is the material grade.