Surface finishes
The Group Number 1-4 (least to most combustible) provides a hierarchy for the risk of the spread of flame across the surface finish based on the measured or predicted 'time to flashover' in the ISO 9705 test.
Some products from Australia are tested to AS 3837. This is the same test as ISO 5660 but with a different end-of-test criteria, which may result in a different group number for some surface finishes.
PDF NZBC Fire Group Number Ratings
Al.5 Determining a Group Number for some surface finishes For the purposes of compliance with the surface finish requirements, the specified combinations of substrate and coating in Table Al can be taken as having the performance indicated without the need for further evaluation using Al.2 or Al.3 Performance (with or without coating) GI-S G2-S ...
AS/NZS 5131. It therefore addresses areas including materials used for fabrication, cutting, holing, shaping, welding, bolting, surface preparation, corrosion protection, shop assembly, handling, transport.
PDF Steel & Tube Engineering Steels Product Guide October 2024
Additional Notes on Steel Surface Maximum Group
Uses and Grades of Stainless Steel 304. For Steel Surface Maximum Group, this point helps readers notice the most relevant visual details before moving into the gallery.
Comparison of Maraging Steel Surface Integrity in | PDF | Machining. This note connects the source idea with the visuals in a simple, reader-friendly way.
Understanding Surface Roughness In Mirror Stainless Steel | Artizono. It works as a short bridge between the article summary and the gallery section.
Looking at multiple sources also helps separate the main idea from small decorative details.
These notes are added so the page offers more than images and gives each visitor a clearer reason to keep reading.
