How a material earns its place.
We accept an alloy and a property only when the source is a scholarly paper, research institution, standards body, or original developer or rights holder. Blogs and news reports are not numerical evidence.
Two routes to publication
Normally, three independent authoritative issuers must support the exact alloy and claim. Copies of the same table count once. For a proprietary alloy, the verified original developer or rights holder can establish its own reported values through an official document.
Three checks on every URL
- Confirm HTTPS, official issuer domain, redirects, document type, and a fingerprint of the file.
- Read the actual source, confirm the alloy identity, process, temper, product form, thickness, test conditions and units.
- Compare each number with the exact page and table row, inspect complex tables visually, and recheck the source for changes.
If any check fails, the record stays out of the public search. A working link alone is not evidence.
How to read the map
Shaded regions show the separate reported ranges for tensile strength and elongation. They do not say every point inside was measured together. We never turn a range midpoint into a measured result. Thickness groups and tempers remain separate. One-sided bounds appear in the list but are not shaded on the chart. Manufacturer-reported values are not certified design allowables.
Current release
Four Rheinfelden-developed casting alloys are published from its official handbook, with table locations on each alloy page. Research corpus imports are held for original-paper and cross-reference review.