--- title: "K11424 — Heat-resistant structural steels" description: "K11424 in UNS: material number 1.5426, also listed as 13MnMo6-5. Category: Heat-resistant structural steels. 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Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. UNS · United States · 2 designations # K11424 K11424 is a designation in UNS for the material held under material number 1.5426, also listed as 13MnMo6-5. It is a material in the category Heat-resistant structural steels. We list 2 designations recorded for this grade, in the standards DIN / EN and UNS. - [*Material no.* **1.5426**](/materials/material-no/1.5426 "Material no.: 1.5426") - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=46f8b211-4a42-416c-80c3-592b8f0d1541&designation=1af0b413-5753-456e-b465-32a7759f1ec3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/k11424.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 13MnMo6-5 This grade’s own name](/materials/din-en/13mnmo6-5 "DIN / EN 13MnMo6-5") ## 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 2 designations · 2 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 Withdrawn designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.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 - [13MnMo6-5 This grade’s own name](/materials/din-en/13mnmo6-5 "DIN / EN 13MnMo6-5") UNS United States · 1 - **K11424 This grade’s own name** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Mn Mo Cu Iron — the balance, never listed by a standard — 97.2 % Mn — 1.5 % Mo — 0.6 % Cu — 0.2 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.09–0.14 | | Si | 0.08–0.22 | | Mn | 1.35–1.65 | | P | 0.02 | | S | 0.02 | | Cr | ≤ 0.12 | | Mo | 0.48–0.62 | | Ni | 0.12 | | Cu | ≤ 0.17 | | Al | ≤ 0.03 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper Aluminium 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 | 0,09-0,14 | 0.090 | 0.140 | Range | | Al | ≤0,030 | — | 0.030 | Max | | Si | 0,08-0,22 | 0.080 | 0.220 | Range | | P | 0,02 | 0.020 | 0.020 | Exact | | S | 0,02 | 0.020 | 0.020 | Exact | | Cr | ≤0,12 | — | 0.120 | Max | | Mn | 1,35-1,65 | 1.350 | 1.650 | Range | | Ni | 0,12 | 0.120 | 0.120 | Exact | | Cu | ≤0,17 | — | 0.170 | Max | | Mo | 0,48-0,62 | 0.480 | 0.620 | 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 814 °C Predicted Ae1 706 °C Predicted Acm 381 °C Predicted Bs 540 °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 / 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. [17MnMoV6-4 1.5403 Mn 1,40-1,70 · Mo 0,20-0,50 - ΔMn 0.05 - ΔMo 0.20 - 8 designations](/materials/din-en/17mnmov6-4 "17MnMoV6-4")[18MnMo4-5 1.5414 Mn 0,90-1,50 · Mo 0,45-0,60 - ΔMn 0.30 - ΔMo 0.03 - 4 designations](/materials/din-en/18mnmo4-5 "18MnMo4-5")[15MnMoV4-5 1.5402 Mn 0,90-1,40 · Mo 0,40-0,60 - ΔMn 0.35 - ΔMo 0.05 - 1 designations](/materials/din-en/15mnmov4-5 "15MnMoV4-5") ## 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=46f8b211-4a42-416c-80c3-592b8f0d1541&designation=1af0b413-5753-456e-b465-32a7759f1ec3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/k11424.pdf "Datasheet as PDF")