What is ISO 19959 about?
ISO 19959 specifies the acceptance criteria for the surface examination of steel, nickel alloy, and cobalt alloy investment castings by visual testing.
Who is ISO 19959 for?
ISO 11971 on visual testing of surface quality is relevant to:
- Steels, nickel alloys, and cobalt alloys castings industries
- Quality controller
- Supplier and customer of steel, nickel alloys, and cobalt alloys castings
Why should you use ISO 19959?
Visual Inspection is the oldest and most basic method of inspection. In its simplest form, visual inspection is the process of examining a component or piece of equipment using one's naked eye to look for flaws.
ISO 19959 guides the user in visual inspection of steel, nickel alloys, and cobalt alloys castings by providing information on the test method, acceptance criteria, qualification of personnel required, conditions of testing, testing documentation.
As a user of ISO 19959, you can ensure the quality as it helps the user to perform visual testing on castings. ISO 19959 assists the user in maintaining the quality of the product and helps him to build consumer trust and confidence in the product.
What’s changed since the last update?
BS ISO 19959:2020 supersedes BS ISO 19959:2005, which is withdrawn.
The main changes compared to the previous edition are as follows:
- “Terms and Definition” renumbered as Clause 3
- “Ordering Information” renumbered as Clause 4
- New Clause 7 for “Testing documentation”

