--- title: "HCT780X — Dual phase steels" description: "HCT780X: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/hct780x language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/hct780x.md cs: https://steelequivalents.com/cs/materiály/din-en/hct780x.md de: https://steelequivalents.com/de/werkstoffe/din-en/hct780x.md es: https://steelequivalents.com/es/materiales/din-en/hct780x.md fr: https://steelequivalents.com/fr/matériaux/din-en/hct780x.md hu: https://steelequivalents.com/hu/anyagok/din-en/hct780x.md it: https://steelequivalents.com/it/materiali/din-en/hct780x.md nl: https://steelequivalents.com/nl/materialen/din-en/hct780x.md pl: https://steelequivalents.com/pl/materiały/din-en/hct780x.md pt: https://steelequivalents.com/pt/materiais/din-en/hct780x.md ru: https://steelequivalents.com/ru/материалы/din-en/hct780x.md tr: https://steelequivalents.com/tr/malzemeler/din-en/hct780x.md zh: https://steelequivalents.com/zh/材料/din-en/hct780x.md ja: https://steelequivalents.com/ja/材料/din-en/hct780x.md ar: https://steelequivalents.com/ar/المواد/din-en/hct780x.md ko: https://steelequivalents.com/ko/재료/din-en/hct780x.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/hct780x.md hi: https://steelequivalents.com/hi/सामग्री/din-en/hct780x.md content_hash: sha256:f5b15fe51a7ee87a69f8f86ce5797232cf68c26dd37c0534841383ae38d823b9 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/din-en/hct780x > Canonical URL: https://steelequivalents.com/materials/din-en/hct780x > 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 # HCT780X HCT780X is a material in the category [Dual phase steels](/categories/dual-phase-steels "Dual phase steels"), held under material number 1.0943. Its recorded composition includes C ≤ 0.18%, Al ≤ 2%, Si ≤ 0.8%, V ≤ 0.2% and Mn ≤ 2.5%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.0943**](/materials/material-no/1.0943 "Material no.: 1.0943") - [*Category* **Dual phase steels · 4 grades**](/categories/dual-phase-steels "Category: Dual phase steels · 4 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=9377da4a-f13c-49e6-8ae5-5dddd7fb0279&designation=8725cbda-dea6-4e71-ba78-4d8c5dd766a0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/hct780x.pdf "Datasheet as PDF") ## About Dual phase steels Dual phase steels are steels with a ferritic matrix containing a dispersed martensitic phase. This combination provides a balance of strength, ductility and formability, making them suitable for formed structural and safety components, especially in vehicle bodies. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Chemical composition 8 elements on file · weight % What this alloy is Fe Mn Al Si Iron — the balance, never listed by a standard — 94.2 % Mn — 2.5 % Al — 2 % Si — 0.8 % Traces & impurities · 0.5 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.18 | | Si | ≤ 0.8 | | Mn | ≤ 2.5 | | P | 0.08 — Unusual | | S | 0.015 | | V | ≤ 0.2 | | Al | ≤ 2 | | B | ≤ 0.005 | Carbon Silicon Manganese Phosphorus Sulfur Vanadium Aluminium 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 | ≤0,005 | — | 0.005 | Max | | C | ≤0,18 | — | 0.180 | Max | | Al | ≤2,00 | — | 2.000 | Max | | Si | ≤0,80 | — | 0.800 | Max | | P | 0,08 | 0.080 | 0.080 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | V | ≤0,20 | — | 0.200 | Max | | Mn | ≤2,50 | — | 2.500 | Max | - (Cr+Mo)≤1,00; (Nb+Ti)≤0,15 - (Cr+Mo)≤1,00; (Nb+Ti)≤0,15 - (Cr+Mo)≤1,00; (Nb+Ti)≤0,15 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Cr, Mo. ## 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 1.0, a shared category, and a published range for Mn / Al 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. [HCT980X 1.0944 Mn ≤2,50 · Al ≤2,00 - ΔMn 0.00 - ΔAl 0.00 - 1 designations](/materials/din-en/hct980x "HCT980X")[HCT600X 1.0941 Mn ≤2,20 · Al ≤2,00 - ΔMn 0.15 - ΔAl 0.00 - 2 designations](/materials/din-en/hct600x "HCT600X")[HCT500X 1.0939 Mn ≤2,00 · Al ≤2,00 - ΔMn 0.25 - ΔAl 0.00 - 2 designations](/materials/din-en/hct500x "HCT500X") ## 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=9377da4a-f13c-49e6-8ae5-5dddd7fb0279&designation=8725cbda-dea6-4e71-ba78-4d8c5dd766a0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/hct780x.pdf "Datasheet as PDF")