Materials

Find materials by name, abbreviation or formula. Optionally filter by category slug (for example polymers, metals, energy). Returns ids to use with get_material.

The sourced record of one material: sourced numbers with conditions, method and source location, plus uses, hazards, failure modes, corrosion and supply facts. Optionally narrow to one property or fact topic.

Line several materials up on one property, with each value, its conditions and its source. Values are also given in the property's canonical unit (value_canonical), so they can be ranked directly. Values measured under different conditions are listed separately and are not averaged.

The property names in use, with their canonical unit and whether higher or lower is better. Use these names with get_material and compare.

A plain-language definition of a technical term or abbreviation used on material pages, for example ARC, SoC or adiabatic.

Requirements in, candidates out. Each material gets a verdict: pass (every constraint met by a sourced value), fail, or unknown (no data on a constraint, so it cannot be ruled in or out). Every constraint reports pass, fail or no_data and the strongest evidence level behind it (flown, measured, derived, inferred, estimated, predicted). By default only passes and unknowns are returned, passes first. Context narrows which values count: at_temperature (degrees C; values measured at another temperature do not count), flown_only (only values measured in the real space environment), environment, include_failed, limit. Materials with no data on any constraint are not listed: use what_is_missing to see coverage for one material.

Every current sourced value for one material (optionally one property) in canonical units, with evidence level and a claim_id. Use the claim_id with prove_claim to see the exact source and passage.

Everything behind one value: as printed in the source, converted, the evidence level and what it means, the conditions, and each source with the place in it (and the passage where we have it).

For one material and a list of properties: which have sourced data (and the strongest evidence) and which have none. "no_data" means not covered yet, not known to be safe.

Which material a code names: a UNS number, EN number or name, DIN, JIS, AISI or SAE number, ASTM or AMS specification, or trade name (for example S31600, 1.4401, SUS316, A240). Case, spaces and hyphens do not matter, and a short code also lists the codes that start with it. Each row gives the system, the code, a note (product form or a caveat) and whether the match is exact. A specification such as ASTM A240 covers many grades and returns every material that cites it. A note of "nearest equivalent" means the source itself hedges: do not treat the two as the same grade.

Full-text search over short passages quoted from our sources. Returns the passage, the source and the place in it. Passages are still being added, so an empty answer means none indexed yet.