--- title: "P91 — composition, equivalents and standards" description: "P91 is a designation in ČSN for the grade also listed as 17119. We list 2 designations recorded for this grade, in the standards ČSN." canonical: https://steelequivalents.com/materials/csn/p91 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/p91.md cs: https://steelequivalents.com/cs/materiály/csn/p91.md de: https://steelequivalents.com/de/werkstoffe/csn/p91.md es: https://steelequivalents.com/es/materiales/csn/p91.md fr: https://steelequivalents.com/fr/matériaux/csn/p91.md hu: https://steelequivalents.com/hu/anyagok/csn/p91.md it: https://steelequivalents.com/it/materiali/csn/p91.md nl: https://steelequivalents.com/nl/materialen/csn/p91.md pl: https://steelequivalents.com/pl/materiały/csn/p91.md pt: https://steelequivalents.com/pt/materiais/csn/p91.md ru: https://steelequivalents.com/ru/материалы/csn/p91.md tr: https://steelequivalents.com/tr/malzemeler/csn/p91.md zh: https://steelequivalents.com/zh/材料/csn/p91.md ja: https://steelequivalents.com/ja/材料/csn/p91.md ar: https://steelequivalents.com/ar/المواد/csn/p91.md ko: https://steelequivalents.com/ko/재료/csn/p91.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/p91.md hi: https://steelequivalents.com/hi/सामग्री/csn/p91.md content_hash: sha256:dc15e38f3a976cb77106657ffde8f5a963faa95f9cc880a107c215c224c0db10 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/materials/csn/p91 > Canonical URL: https://steelequivalents.com/materials/csn/p91 > 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. ČSN · Czechia · 2 designations # P91 P91 is a designation in ČSN for the grade also listed as 17119. We list 2 designations recorded for this grade, in the standards ČSN. - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e410b1f4-bf69-46d7-a56a-a74cae539df2&designation=b8db6cb8-ead8-4acb-bd61-6d25e0143006 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/p91.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [ČSN 17119 This grade’s own name](/materials/csn/17119 "ČSN 17119") ## Also known as 2 designations · 1 standards · nothing hidden This grade’s own name recorded in our sources as this grade’s own designation under that standard. Indicative taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. Withdrawn designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. ČSN Czechia · 2 - [17119 This grade’s own name](/materials/csn/17119 "ČSN 17119") - **P91 Indicative** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: C, Mn, Si, Ni, Cr, Mo. ## Physical & mechanical properties An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material. ## Looking for this grade under another name? Search the catalogue by designation, material number or composition — every name on this page is itself a way in. [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e410b1f4-bf69-46d7-a56a-a74cae539df2&designation=b8db6cb8-ead8-4acb-bd61-6d25e0143006 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/p91.pdf "Datasheet as PDF")