--- title: "Steel Wiki — Grades, Standards & Material Properties" description: "Steel grades, standards and properties, explained. 54 articles about Equivalence & Standards, Reading a Datasheet, Calculated Values, Steel Families." canonical: https://steelequivalents.com/wiki language: en robots: index, follow og_type: website type: wiki-index language_alternates: en: https://steelequivalents.com/wiki.md cs: https://steelequivalents.com/cs/wiki.md de: https://steelequivalents.com/de/wiki.md es: https://steelequivalents.com/es/wiki.md fr: https://steelequivalents.com/fr/wiki.md hu: https://steelequivalents.com/hu/wiki.md it: https://steelequivalents.com/it/wiki.md nl: https://steelequivalents.com/nl/wiki.md pl: https://steelequivalents.com/pl/wiki.md pt: https://steelequivalents.com/pt/wiki.md ru: https://steelequivalents.com/ru/вики.md tr: https://steelequivalents.com/tr/wiki.md zh: https://steelequivalents.com/zh/维基.md ja: https://steelequivalents.com/ja/ウィキ.md ar: https://steelequivalents.com/ar/ويكي.md ko: https://steelequivalents.com/ko/위키.md pt-br: https://steelequivalents.com/pt-br/wiki.md hi: https://steelequivalents.com/hi/विकी.md content_hash: sha256:4d6cdd40f5b9fe4d26885b15f170581e9bdbf09867a1b5fd460f0e6776b67b4c generated: 2026-09-22 --- > **Machine-readable Markdown rendering.** This is a Markdown representation of a web page, > served for AI agents and crawlers as a token-efficient alternative to the full HTML. > Full interactive HTML version: https://steelequivalents.com/wiki > Canonical URL: https://steelequivalents.com/wiki > Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi > Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything > below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. # Steel, Explained. A practical reference — grades, standards, heat treatment, testing and equivalents. Search Popular categories [Steel Families 16](/wiki/steel-families "Steel Families")[Heat Treatment 13](/wiki/heat-treatment "Heat Treatment")[Reading a Datasheet 12](/wiki/reading-a-datasheet "Reading a Datasheet")[Calculated Values 9](/wiki/calculated-values "Calculated Values")[Browse all 5 categories](#browse "Browse all 5 categories") 54 Articles — 5 Categories — Reviewed Weekly ## Browse By Category [![Steel Families — steel wiki: properties, standards & testing](/images/uploads/38a82636-57dc-4c53-bae4-bddd6e1827a4/steel-wiki-steel-families-banner-1920x548.jpg) 16 articles ### Steel Families The major groups of steel and what each is for: tool steels, high-strength structural grades, spring steels, and grades built for high or low service temperature.](/wiki/steel-families "Steel Families — 16 articles") [![Equivalence & Standards category, steel wiki](/images/uploads/6f881ae8-5f60-4491-9a15-5ac7e19c2b51/steel-wiki-equivalence-and-standards-card-1920x1080.jpg) 4 articles ### Equivalence & Standards How steel grades map across EN, DIN, ASTM, AISI, GOST, JIS and UNE — how designations are built, and why an equivalent grade is never simply an identical one.](/wiki/equivalence-and-standards "Equivalence & Standards — 4 articles")[![Reading a Datasheet category, steel wiki](/images/uploads/00988029-4435-44f8-bae5-44ce073fc7e3/steel-wiki-reading-a-datasheet-card-1920x1080.jpg) 12 articles ### Reading a Datasheet What the numbers on a steel datasheet actually mean: chemical analysis, tensile and yield strength, hardness, and the delivery condition that changes all of them.](/wiki/reading-a-datasheet "Reading a Datasheet — 12 articles")[![Calculated Values category, steel wiki](/images/uploads/d9773d37-dc9b-4056-aa32-3ef5a23e3dd4/steel-wiki-calculated-values-card-1920x1080.jpg) 9 articles ### Calculated Values The values engineers work out rather than look up — PREN for pitting resistance, carbon equivalent for weldability, and the formulas behind them.](/wiki/calculated-values "Calculated Values — 9 articles")[![Heat Treatment category, steel wiki](/images/uploads/836dd1fd-f42c-402c-9219-b65ea7604722/steel-wiki-heat-treatment-card-1920x1080.jpg) 13 articles ### Heat Treatment Hardening, tempering, annealing, case-hardening and nitriding — what each process changes in the steel, and how it shows up in the grade designation.](/wiki/heat-treatment "Heat Treatment — 13 articles") ## Full Index [Equivalence & Standards How steel grades map across EN, DIN, ASTM, AISI, GOST, JIS and UNE — how designations are built, and why an equivalent grade is never simply an identical one. 4 articles](/wiki/equivalence-and-standards "Equivalence & Standards")[Reading a Datasheet What the numbers on a steel datasheet actually mean: chemical analysis, tensile and yield strength, hardness, and the delivery condition that changes all of them. 12 articles](/wiki/reading-a-datasheet "Reading a Datasheet")[Calculated Values The values engineers work out rather than look up — PREN for pitting resistance, carbon equivalent for weldability, and the formulas behind them. 9 articles](/wiki/calculated-values "Calculated Values")[Steel Families The major groups of steel and what each is for: tool steels, high-strength structural grades, spring steels, and grades built for high or low service temperature. 16 articles](/wiki/steel-families "Steel Families")[Heat Treatment Hardening, tempering, annealing, case-hardening and nitriding — what each process changes in the steel, and how it shows up in the grade designation. 13 articles](/wiki/heat-treatment "Heat Treatment")