--- title: "K02803 — 9 equivalent grades, compared" description: "The designation K02803 is carried by 9 different grades. Compare them on the elements that actually differ, then open the one your print means." canonical: https://steelequivalents.com/materials/uns/k02803 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/k02803.md cs: https://steelequivalents.com/cs/materiály/uns/k02803.md de: https://steelequivalents.com/de/werkstoffe/uns/k02803.md es: https://steelequivalents.com/es/materiales/uns/k02803.md fr: https://steelequivalents.com/fr/matériaux/uns/k02803.md hu: https://steelequivalents.com/hu/anyagok/uns/k02803.md it: https://steelequivalents.com/it/materiali/uns/k02803.md nl: https://steelequivalents.com/nl/materialen/uns/k02803.md pl: https://steelequivalents.com/pl/materiały/uns/k02803.md pt: https://steelequivalents.com/pt/materiais/uns/k02803.md ru: https://steelequivalents.com/ru/материалы/uns/k02803.md tr: https://steelequivalents.com/tr/malzemeler/uns/k02803.md zh: https://steelequivalents.com/zh/材料/uns/k02803.md ja: https://steelequivalents.com/ja/材料/uns/k02803.md ar: https://steelequivalents.com/ar/المواد/uns/k02803.md ko: https://steelequivalents.com/ko/재료/uns/k02803.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/k02803.md hi: https://steelequivalents.com/hi/सामग्री/uns/k02803.md content_hash: sha256:65ec545706880963c8f5b0f60f21bf7b4700b98be0c471c6b43708cf87a0fdf6 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/uns/k02803 > Canonical URL: https://steelequivalents.com/materials/uns/k02803 > 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. UNS · United States · 9 grades # K02803 The designation K02803 is carried by 9 different grades. Compare them on the elements that actually differ, then open the one your print means. - *Matching grades* **9** - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - [*Category* **Fine-grain structural steels · 50 grades**](/categories/fine-grain-structural-steels "Category: Fine-grain structural steels · 50 grades") [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry") ## Which of the 9 do you want? This name is carried by several grades. The elements shown are the ones whose values actually differ across the set — the ones that decide the question. Values are the source text verbatim; an em dash means no value on file for that element on that grade, not zero. | Grade | Material no. | Category | Designations | S% | C% | Mn% | P% | Si% | N% | |---|---|---|---|---|---|---|---|---|---| | [19Mn6](/materials/din-en/19mn6 "19Mn6") | [1.0473](/materials/material-no/1.0473 "1.0473") 1.0 | [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels") | 26 | 0,01 | 0,10-0,22 | 1,00-1,70 | 0,025 | ≤0,60 | 0,012 | | [19Mn5](/materials/din-en/19mn5 "19Mn5") | [1.0482](/materials/material-no/1.0482 "1.0482") 1.0 | [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels") | 9 | 0,04 | 0,17-0,22 | 1,00-1,30 | 0,04 | 0,30-0,60 | — | | [21Mn6](/materials/din-en/21mn6 "21Mn6") | [1.0485](/materials/material-no/1.0485 "1.0485") 1.0 | [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels") | 4 | 0,045 | ≤0,23 | 1,15-1,60 | 0,045 | ≤0,60 | — | | [S355NH](/materials/din-en/s355nh "S355NH") | [1.0539](/materials/material-no/1.0539 "1.0539") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 7 | 0,03 | ≤0,20 | 0,90-1,65 | 0,035 | ≤0,50 | 0,02 | | [FeE355KGN](/materials/afnor/fee355kgn "FeE355KGN") | [1.0545](/materials/material-no/1.0545 "1.0545") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 16 | 0,025 | ≤0,20 | 0,90-1,65 | 0,03 | ≤0,50 | 0,015 | | [1.0562](/materials/material-no/1.0562 "1.0562") | [1.0562](/materials/material-no/1.0562 "1.0562") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 74 | 0,015 | ≤0,18 | 1,10-1,70 | 0,025 | ≤0,50 | 0,012 | | [P355NH](/materials/din-en/p355nh "P355NH") | [1.0565](/materials/material-no/1.0565 "1.0565") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 18 | 0,015 | ≤0,18 | 1,10-1,70 | 0,025 | ≤0,50 | 0,012 | | [1.0566](/materials/material-no/1.0566 "1.0566") | [1.0566](/materials/material-no/1.0566 "1.0566") 1.0 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 29 | 0,015 | ≤0,18 | 1,10-1,70 | 0,025 | ≤0,50 | 0,012 | | [A 299](/materials/din-en/a-299 "A 299") | [1.9515](/materials/material-no/1.9515 "1.9515") 1.9 | [Fine-grain structural steels](/categories/fine-grain-structural-steels "Fine-grain structural steels") | 2 | 0,035 | ≤0,28 | 0,90-1,40 | 0,035 | 0,15-0,40 | — | ## Not sure which one your print means? 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 "Inquiry")