--- title: "Material 1.2791 — Others" description: "1.2791 is the material number this entry is held under. It is a material in the category Others." canonical: https://steelequivalents.com/materials/material-no/1.2791 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.2791.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.2791.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.2791.md es: https://steelequivalents.com/es/materiales/número-de-material/1.2791.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.2791.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.2791.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.2791.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.2791.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.2791.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.2791.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.2791.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.2791.md zh: https://steelequivalents.com/zh/材料/材料编号/1.2791.md ja: https://steelequivalents.com/ja/材料/材料番号/1.2791.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.2791.md ko: https://steelequivalents.com/ko/재료/재료번호/1.2791.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.2791.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.2791.md content_hash: sha256:f37968b04be108773aa852f7af765d8a7fdf30de97ae49c326dbf8daef7ea1c9 generated: 2026-09-24 --- > **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/material-no/1.2791 > Canonical URL: https://steelequivalents.com/materials/material-no/1.2791 > 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. # 1.2791 1.2791 is the material number this entry is held under. It is a material in the category Others. - ***Material no.* **1.2791**** - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") [Search](/search "Steel grade search")[Inquiry](/inquiry?material=278656c9-9ace-4917-b804-3508648c504b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.2791.pdf "Datasheet as PDF") ## About Others These are miscellaneous metallic alloys that do not fit a more specific material family and may be based on iron, nickel, cobalt, copper or other alloy systems. They are selected for applications requiring particular combinations of strength, hardness, toughness, wear resistance or resistance to demanding service conditions. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Mo Ni Iron — the balance, never listed by a standard — 95.6 % Cr — 1 % Mo — 1 % Ni — 0.9 % Traces & impurities · 1.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.47–0.5 | | Si | 0.12–0.25 | | Mn | 0.65–0.85 | | P | 0.015 | | S | 0.007 | | Cr | 0.9–1 | | Mo | 0.9–1 | | Ni | 0.8–1 | | V | 0.08–0.15 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium 0.01 % 0.1 % 1 % 10 % 100 % The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other. | Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound | |---|---|---|---|---| | C | 0,47-0,50 | 0.470 | 0.500 | Range | | Si | 0,12-0,25 | 0.120 | 0.250 | Range | | P | 0,015 | 0.015 | 0.015 | Exact | | S | 0,007 | 0.007 | 0.007 | Exact | | V | 0,08-0,15 | 0.080 | 0.150 | Range | | Cr | 0,90-1,00 | 0.900 | 1.000 | Range | | Mn | 0,65-0,85 | 0.650 | 0.850 | Range | | Ni | 0,80-1,00 | 0.800 | 1.000 | Range | | Mo | 0,90-1,00 | 0.900 | 1.000 | Range | The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred. ## Predicted transformation temperatures computed from composition · °C Predicted Ae3 745 °C Predicted Ae1 725 °C Predicted Acm 661 °C Predicted Bs 488 °C These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either. ## Physical & mechanical properties Density 7,85 g/cm³ Exact 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.2, a shared category, and a published range for Cr / Mo that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [70MnMoCr8 1.2824 Cr 0,90-1,20 · Mo 0,90-1,40 - ΔCr 0.10 - ΔMo 0.20 - 1 designations](/materials/din-en/70mnmocr8 "70MnMoCr8") ## 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=278656c9-9ace-4917-b804-3508648c504b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.2791.pdf "Datasheet as PDF")