ISO 7539-5 is an international standard and a part of the ISO 7539 series that discusses the methods for the preparation and use of C-ring specimens for corrosion of metals and alloys. Corrosion is a type of oxidization whereas rusting is a part of corrosion. If an alloy contains ferrous metal (iron), it will rust.
ISO 7539-5 covers procedures for designing, preparing, stressing, exposing and inspecting C-ring test specimens for investigating the susceptibility of metal to stress corrosion. Analysis of the state and distribution of stress in the C-ring is presented. The term “metal” as used in this part of ISO 7539 includes alloys.
The C-ring is a versatile, economical specimen for determining the susceptibility to stress corrosion cracking of all types of metals in a wide variety of product forms including parts joined by welding. It is particularly suitable for tests of a tube, rod and plate. C-ring specimens may be stressed to predetermined levels, using simple equipment for the application of either constant load or constant strain.
ISO 7539-5 on preparation and use of C-bend specimens applies to:
Corrosion is a type of oxidization whereas rusting is a part of corrosion. If an alloy contains ferrous metal (iron), it will rust.
ISO 7539-5 will enable you to provide good quality metals and alloys by having stress corrosion testing in which a C-ring specimen is loaded under constant displacement conditions with tensile stress produced on the exterior of the ring by tightening a bolt centered on the diameter of the ring. C-ring can alternatively be stressed in the reverse direction by spreading the ring and creating tensile stress on the inside surface or, preferably, by the use of a wedge opening technique to displace the arms of the C-rings.
ISO 7539-5 provides you with comprehensive guidance useful throughout the process of production.
ISO 7539-5:1989