Engineer builds open dataset cross-referencing 217 steel grades across 5 global standards

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A software engineer frustrated with unreliable steel grade lookups has built a freely available cross-reference database covering 217 steel and alloy grades. The dataset maps equivalents across five major standards systems — ASTM, EN, JIS, GB, and IS — and includes yield strength, tensile strength, density, chemical composition, and up to five international equivalents per grade. Each grade has its own detail page, and a side-by-side comparison tool lets users evaluate any two materials against mechanical properties, chemical composition, and price per kilogram. The dataset is published on GitHub under an MIT licence as a machine-readable JSON file, making it compatible with third-party tools and APIs. The creator notes the resource is intended for reference and cross-checking only, and is not a substitute for a Mill Test Report or a licensed engineer's approval.

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