--- title: "S790QL — High-strength steels" description: "S790QL: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/s790ql language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/s790ql.md cs: https://steelequivalents.com/cs/materiály/din-en/s790ql.md de: https://steelequivalents.com/de/werkstoffe/din-en/s790ql.md es: https://steelequivalents.com/es/materiales/din-en/s790ql.md fr: https://steelequivalents.com/fr/matériaux/din-en/s790ql.md hu: https://steelequivalents.com/hu/anyagok/din-en/s790ql.md it: https://steelequivalents.com/it/materiali/din-en/s790ql.md nl: https://steelequivalents.com/nl/materialen/din-en/s790ql.md pl: https://steelequivalents.com/pl/materiały/din-en/s790ql.md pt: https://steelequivalents.com/pt/materiais/din-en/s790ql.md ru: https://steelequivalents.com/ru/материалы/din-en/s790ql.md tr: https://steelequivalents.com/tr/malzemeler/din-en/s790ql.md zh: https://steelequivalents.com/zh/材料/din-en/s790ql.md ja: https://steelequivalents.com/ja/材料/din-en/s790ql.md ar: https://steelequivalents.com/ar/المواد/din-en/s790ql.md ko: https://steelequivalents.com/ko/재료/din-en/s790ql.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/s790ql.md hi: https://steelequivalents.com/hi/सामग्री/din-en/s790ql.md content_hash: sha256:a06ff47986057e9f26e016eb652ba5c28651c6424de7d1d06d3561c631637e56 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/din-en/s790ql > Canonical URL: https://steelequivalents.com/materials/din-en/s790ql > 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. DIN / EN · Europe · 1 designation # S790QL S790QL is a material in the category [High-strength steels](/categories/high-strength-steels "High-strength steels"), held under material number 1.8795. Its recorded composition includes C 0.12–0.18%, Si 0.2–0.5%, Cr ≤ 0.8%, Mn 1.2–1.7% and W 0.1–0.7%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.8795**](/materials/material-no/1.8795 "Material no.: 1.8795") - [*Category* **High-strength steels · 128 grades**](/categories/high-strength-steels "Category: High-strength steels · 128 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0df68d26-00d4-4dfd-a3fc-2a9306f4df36&designation=0b084570-00de-474d-98b8-6b49a831e0b6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s790ql.pdf "Datasheet as PDF") ## About High-strength steels High-strength steels are steels designed to carry high loads while resisting deformation. They are used for load-bearing structures, vehicles and machinery where strength, durability and reduced material weight are important. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Chemical composition 15 elements on file · weight % What this alloy is Fe Mn Cr Ni Iron — the balance, never listed by a standard — 95.6 % Mn — 1.5 % Cr — 0.8 % Ni — 0.4 % Traces & impurities · 1.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.12–0.18 | | Si | 0.2–0.5 | | Mn | 1.2–1.7 | | P | 0.025 | | S | 0.015 | | Cr | ≤ 0.8 | | Mo | 0.2–0.5 | | Ni | 0.4 | | V | 0.05–0.12 | | W | 0.1–0.7 | | Cu | ≤ 0.25 | | Al | 0.015–0.05 | | Ti | ≤ 0.05 | | Nb | ≤ 0.05 | | N | 0.02 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Tungsten Copper Aluminium Titanium Niobium Nitrogen 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 | 0,12-0,18 | 0.120 | 0.180 | Range | | N | 0,02 | 0.020 | 0.020 | Exact | | Al | 0,015-0,050 | 0.015 | 0.050 | Range | | Si | 0,20-0,50 | 0.200 | 0.500 | Range | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Ti | ≤0,05 | — | 0.050 | Max | | V | 0,05-0,12 | 0.050 | 0.120 | Range | | Cr | ≤0,80 | — | 0.800 | Max | | Mn | 1,20-1,70 | 1.200 | 1.700 | Range | | Ni | 0,4 | 0.400 | 0.400 | Exact | | Cu | ≤0,25 | — | 0.250 | Max | | Nb | ≤0,05 | — | 0.050 | Max | | Mo | 0,20-0,50 | 0.200 | 0.500 | Range | | W | 0,10-0,70 | 0.100 | 0.700 | 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 812 °C Predicted Ae1 723 °C Predicted Acm 444 °C Predicted Bs 513 °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 1.8, a shared category, and a published range for Mn / Cr 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. [20MnCrNiMo6-3 1.8708 Mn 1,30-1,55 · Cr 0,60-0,75 - ΔMn 0.02 - ΔCr 0.28 - 1 designations](/materials/din-en/20mncrnimo6-3 "20MnCrNiMo6-3")[S420NH 1.8750 Mn 1,00-1,70 · Cr ≤0,30 - ΔMn 0.10 - ΔCr 0.25 - 1 designations](/materials/din-en/s420nh "S420NH")[S420NLH 1.8751 Mn 1,00-1,70 · Cr ≤0,30 - ΔMn 0.10 - ΔCr 0.25 - 1 designations](/materials/din-en/s420nlh "S420NLH")[S960G1QL 1.8797 Mn 1,20-1,80 · Cr 0,40-1,00 - ΔMn 0.05 - ΔCr 0.30 - 1 designations](/materials/din-en/s960g1ql "S960G1QL")[S890G1QL 1.8796 Mn 1,20-1,50 · Cr 0,50-0,90 - ΔMn 0.10 - ΔCr 0.30 - 1 designations](/materials/din-en/s890g1ql "S890G1QL")[16MnCrMo4-3 1.8717 Mn 0,95-1,30 · Cr 0,40-0,65 - ΔMn 0.32 - ΔCr 0.13 - 1 designations](/materials/din-en/16mncrmo4-3 "16MnCrMo4-3") ## 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=0df68d26-00d4-4dfd-a3fc-2a9306f4df36&designation=0b084570-00de-474d-98b8-6b49a831e0b6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s790ql.pdf "Datasheet as PDF")