0 · Upload the certificate
Auto-read needs an internet connection the first time (it loads an OCR engine) and works best on a sharp, straight-on photo of the chemical analysis table. Always confirm the values against the cert — auto-read fills the boxes in amber until you check them.
1 · From the certificate
Ladle analysis is one sample from the heat — pieces vary. Treat Si and P as an indication of reactivity, not a guarantee (AS/NZS 4680:2025 Cl. 2.3 note).
2 · The article
Minimums are AS/NZS 4680:2025 Table 3 (not centrifuged). Centrifuged work is Table 5 — different numbers.
3 · What the kettle will do
4 · The picture — alloy layers for this steel
Γ gamma at the steel, δ delta columnar, ζ zeta needles, η free zinc on top. Widths scale with the prediction; η is what makes it bright — a Sandelin or hyper-reactive steel eats it and comes out grey.
Take it further
The model behind this is qualitative — Sandelin peak, Sebisty dip, hyper-reactive rise, damped for a nickel bath. GHB's kettle trial data on hold time and heat-up by gauge is what turns it into a number for your plant.
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