--- title: "1.0477 — Heat-resistant structural steels" description: "1.0477 is the material number of the grade also listed as P285NH. Category: Heat-resistant structural steels. Designations recorded for this grade: 3." canonical: https://steelequivalents.com/materials/material-no/1.0477 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0477.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0477.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0477.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0477.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0477.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0477.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0477.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0477.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0477.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0477.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0477.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0477.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0477.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0477.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0477.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0477.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0477.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0477.md content_hash: sha256:5a957b85ad4aeaaa39ecf5980e3e47b487f002fb03bb55b3e0a9c7d998b298e9 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/1.0477 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0477 > 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 · 3 designations # 1.0477 1.0477 is the material number of the grade also listed as P285NH. It is a material in the category Heat-resistant structural steels. We list 3 designations recorded for this grade, in the standards DIN / EN and UNS. - ***Material no.* **1.0477**** - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - *Designations* **3** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=a18417f7-bac5-46d6-86d9-f05520190243 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0477.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN P285NH This grade’s own name](/materials/din-en/p285nh "DIN / EN P285NH") - [UNS K02704 This grade’s own name · 3 grades on that route](/materials/uns/k02704 "UNS K02704") ## 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 3 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 - [P285NH This grade’s own name](/materials/din-en/p285nh "DIN / EN P285NH") UNS United States · 2 - [K02704 This grade’s own name](/materials/uns/k02704 "UNS K02704") - [K02800 This grade’s own name](/materials/uns/k02800 "UNS K02800") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 13 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 97.4 % Mn — 1 % Si — 0.4 % Cr — 0.3 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.18 | | Si | ≤ 0.4 | | Mn | 0.6–1.4 | | P | 0.025 | | S | 0.015 | | Cr | ≤ 0.3 | | Mo | ≤ 0.08 | | Ni | ≤ 0.3 | | V | ≤ 0.05 | | Cu | ≤ 0.2 | | Al | 0.02–0.06 | | Nb | ≤ 0.03 | | N | 0.02 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper Aluminium 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 | ≤0,18 | — | 0.180 | Max | | N | 0,02 | 0.020 | 0.020 | Exact | | Al | 0,020-0,060 | 0.020 | 0.060 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | V | ≤0,05 | — | 0.050 | Max | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | 0,60-1,40 | 0.600 | 1.400 | Range | | Ni | ≤0,30 | — | 0.300 | Max | | Cu | ≤0,20 | — | 0.200 | Max | | Nb | ≤0,03 | — | 0.030 | Max | | Mo | ≤0,08 | — | 0.080 | Max | - (Nb+V) ≤0,05 - (Nb+V) ≤0,05 - (Nb+V) ≤0,05 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 815 °C Predicted Ae1 715 °C Predicted Acm 418 °C Predicted Bs 560 °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 1.0, 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. [1.0425 1.0425 Mn 0,80-1,40 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 79 designations](/materials/material-no/1.0425 "1.0425")[1.0345 1.0345 Mn 0,60-1,20 · Si ≤0,35 - ΔMn 0.10 - ΔSi 0.03 - 62 designations](/materials/material-no/1.0345 "1.0345")[1.0436 1.0481 Mn 0,90-1,50 · Si ≤0,40 - ΔMn 0.20 - ΔSi 0.00 - 83 designations](/materials/material-no/1.0436 "1.0436")[19Mn5 1.0482 Mn 1,00-1,30 · Si 0,30-0,60 - ΔMn 0.15 - ΔSi 0.25 - 9 designations](/materials/din-en/19mn5 "19Mn5")[C22.8 1.0460 Mn 0,30-0,90 · Si ≤0,40 - ΔMn 0.40 - ΔSi 0.00 - 9 designations](/materials/din-en/c22-8 "C22.8")[19Mn6 1.0473 Mn 1,00-1,70 · Si ≤0,60 - ΔMn 0.35 - ΔSi 0.10 - 26 designations](/materials/din-en/19mn6 "19Mn6") ## 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=a18417f7-bac5-46d6-86d9-f05520190243 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0477.pdf "Datasheet as PDF")