--- title: "1.5465 — Heat-resistant structural steels" description: "1.5465 is the material number of the grade also listed as 26MnMoB6-4. Category: Heat-resistant structural steels. Designations recorded for this grade: 1." canonical: https://steelequivalents.com/materials/material-no/1.5465 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.5465.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.5465.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.5465.md es: https://steelequivalents.com/es/materiales/número-de-material/1.5465.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.5465.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.5465.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.5465.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.5465.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.5465.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.5465.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.5465.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.5465.md zh: https://steelequivalents.com/zh/材料/材料编号/1.5465.md ja: https://steelequivalents.com/ja/材料/材料番号/1.5465.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.5465.md ko: https://steelequivalents.com/ko/재료/재료번호/1.5465.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.5465.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.5465.md content_hash: sha256:283ac0a3e9a6df84f1a2c76564e3c11a5e95f65c73c0befc6b19ee933cb557ae 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/1.5465 > Canonical URL: https://steelequivalents.com/materials/material-no/1.5465 > 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. Material number · Europe · 1 designation # 1.5465 1.5465 is the material number of the grade also listed as 26MnMoB6-4. It is a material in the category Heat-resistant structural steels. We list 1 designations recorded for this grade, in the standards DIN / EN. - ***Material no.* **1.5465**** - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=903c6bcf-c9d4-422d-8aaf-b9d7283ce4f4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.5465.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 26MnMoB6-4 This grade’s own name](/materials/din-en/26mnmob6-4 "DIN / EN 26MnMoB6-4") ## About Heat-resistant structural steels Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 1 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. DIN / EN Europe · 1 - [26MnMoB6-4 This grade’s own name](/materials/din-en/26mnmob6-4 "DIN / EN 26MnMoB6-4") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 11 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 96.4 % Mn — 1.4 % Si — 0.4 % Cr — 0.4 % Traces & impurities · 1.4 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.25–0.3 | | Si | 0.3–0.6 | | Mn | 1.25–1.5 | | P | 0.025 | | S | 0.025 | | Cr | 0.25–0.5 | | Mo | 0.3–0.45 | | Ni | 0.25–0.5 | | V | ≤ 0.05 | | Cu | ≤ 0.25 | | B | 0.001–0.004 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper Boron 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 | |---|---|---|---|---| | B | 0,001-0,0040 | 0.001 | 0.004 | Range | | C | 0,25-0,30 | 0.250 | 0.300 | Range | | Si | 0,30-0,60 | 0.300 | 0.600 | Range | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | V | ≤0,05 | — | 0.050 | Max | | Cr | 0,25-0,50 | 0.250 | 0.500 | Range | | Mn | 1,25-1,50 | 1.250 | 1.500 | Range | | Ni | 0,25-0,50 | 0.250 | 0.500 | Range | | Cu | ≤0,25 | — | 0.250 | Max | | Mo | 0,30-0,45 | 0.300 | 0.450 | 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 797 °C Predicted Ae1 720 °C Predicted Acm 526 °C Predicted Bs 524 °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 1.5, a shared category, and a published range for Mn / Si 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. [17MnMoV6-4 1.5403 Mn 1,40-1,70 · Si 0,20-0,50 - ΔMn 0.17 - ΔSi 0.10 - 8 designations](/materials/din-en/17mnmov6-4 "17MnMoV6-4")[G10MnMoV6-3 1.5410 Mn 1,20-1,80 · Si ≤0,60 - ΔMn 0.13 - ΔSi 0.15 - 1 designations](/materials/din-en/g10mnmov6-3 "G10MnMoV6-3")[G8MnMo7-4 1.5430 Mn 1,50-1,80 · Si ≤0,60 - ΔMn 0.27 - ΔSi 0.15 - 2 designations](/materials/din-en/g8mnmo7-4 "G8MnMo7-4")[G12MnMo7-4 1.5431 Mn 1,50-1,80 · Si ≤0,60 - ΔMn 0.27 - ΔSi 0.15 - 1 designations](/materials/din-en/g12mnmo7-4 "G12MnMo7-4")[18MnMo4-5 1.5414 Mn 0,90-1,50 · Si ≤0,40 - ΔMn 0.18 - ΔSi 0.25 - 4 designations](/materials/din-en/18mnmo4-5 "18MnMo4-5")[10MnMo4-5 1.5424 Mn 0,95-1,25 · Si 0,55-0,75 - ΔMn 0.27 - ΔSi 0.20 - 1 designations](/materials/din-en/10mnmo4-5 "10MnMo4-5") ## 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=903c6bcf-c9d4-422d-8aaf-b9d7283ce4f4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.5465.pdf "Datasheet as PDF")