--- title: "A478 — 20 equivalent grades, compared" description: "The designation A478 is carried by 20 different grades. Compare them on the elements that actually differ, then open the one your print means." canonical: https://steelequivalents.com/materials/astm/a478 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/a478.md cs: https://steelequivalents.com/cs/materiály/astm/a478.md de: https://steelequivalents.com/de/werkstoffe/astm/a478.md es: https://steelequivalents.com/es/materiales/astm/a478.md fr: https://steelequivalents.com/fr/matériaux/astm/a478.md hu: https://steelequivalents.com/hu/anyagok/astm/a478.md it: https://steelequivalents.com/it/materiali/astm/a478.md nl: https://steelequivalents.com/nl/materialen/astm/a478.md pl: https://steelequivalents.com/pl/materiały/astm/a478.md pt: https://steelequivalents.com/pt/materiais/astm/a478.md ru: https://steelequivalents.com/ru/материалы/astm/a478.md tr: https://steelequivalents.com/tr/malzemeler/astm/a478.md zh: https://steelequivalents.com/zh/材料/astm/a478.md ja: https://steelequivalents.com/ja/材料/astm/a478.md ar: https://steelequivalents.com/ar/المواد/astm/a478.md ko: https://steelequivalents.com/ko/재료/astm/a478.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/a478.md hi: https://steelequivalents.com/hi/सामग्री/astm/a478.md content_hash: sha256:76f1cfb1e64e17f447e0a09ae0ffd3b66e3cc0f4ba5f3caa1fce089c12711619 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/astm/a478 > Canonical URL: https://steelequivalents.com/materials/astm/a478 > 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. ASTM · United States · 20 grades # A478 The designation A478 is carried by 20 different grades. Compare them on the elements that actually differ, then open the one your print means. - *Matching grades* **20** - [*Category* **Special steels for aviation and aerospace · 39 grades**](/categories/special-steels-for-aviation-and-aerospace "Category: Special steels for aviation and aerospace · 39 grades") - [*Category* **Stainless steels · 468 grades**](/categories/stainless-steels "Category: Stainless steels · 468 grades") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - [*Category* **Heat resistant steels · 64 grades**](/categories/heat-resistant-steels "Category: Heat resistant steels · 64 grades") [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry") ## Which of the 20 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 | Ni% | C% | Cr% | Mo% | Si% | P% | |---|---|---|---|---|---|---|---|---|---| | [X15CrNi17-3](/materials/din-en/x15crni17-3 "X15CrNi17-3") | [1.4044](/materials/material-no/1.4044 "1.4044") 1.4 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 33 | 2,00-3,00 | 0,12-0,20 | 15,0-18,0 | — | ≤1,00 | 0,035 | | [1.4057](/materials/material-no/1.4057 "1.4057") | [1.4057](/materials/material-no/1.4057 "1.4057") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 63 | 1,50-2,50 | 0,12-0,22 | 15,0-17,0 | — | ≤1,00 | 0,04 | | [X 12 CrNi 18 8](/materials/din-en/x-12-crni-18-8 "X 12 CrNi 18 8") | [1.4300](/materials/material-no/1.4300 "1.4300") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 76 | 8,00-10,0 | ≤0,12 | 17,0-19,0 | — | ≤1,00 | 0,045 | | [1.4301](/materials/material-no/1.4301 "1.4301") | [1.4301](/materials/material-no/1.4301 "1.4301") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 170 | 8,00-10,5 | ≤0,07 | 17,5-19,5 | — | ≤1,00 | 0,045 | | [X 5 CrNi 18 12](/materials/din-en/x-5-crni-18-12 "X 5 CrNi 18 12") | [1.4303](/materials/material-no/1.4303 "1.4303") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 84 | 11,0-13,0 | ≤0,06 | 17,0-19,0 | — | ≤1,00 | 0,045 | | [1.4306](/materials/material-no/1.4306 "1.4306") | [1.4306](/materials/material-no/1.4306 "1.4306") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 137 | 10,0-12,0 | ≤0,030 | 18,0-20,0 | — | ≤1,00 | 0,045 | | [1.4307](/materials/material-no/1.4307 "1.4307") | [1.4307](/materials/material-no/1.4307 "1.4307") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 88 | 8,00-10,5 | ≤0,030 | 17,5-19,5 | — | ≤1,00 | 0,045 | | [1.4310](/materials/material-no/1.4310 "1.4310") | [1.4310](/materials/material-no/1.4310 "1.4310") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 97 | 6,00-9,50 | 0,05-0,15 | 16,0-19,0 | ≤0,80 | ≤2,00 | 0,045 | | [S30400](/materials/uns/s30400 "S30400") | [1.4314](/materials/material-no/1.4314 "1.4314") 1.4 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 86 | 8,50-10,5 | ≤0,07 | 17,0-19,0 | — | ≤1,00 | 0,045 | | [S30100](/materials/uns/s30100 "S30100") | [1.4324](/materials/material-no/1.4324 "1.4324") 1.4 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 52 | 7,00-9,00 | ≤0,12 | 16,0-18,0 | — | ≤1,00 | 0,045 | | [X9CrNi18-9](/materials/din-en/x9crni18-9 "X9CrNi18-9") | [1.4325](/materials/material-no/1.4325 "1.4325") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 51 | 8,00-10,0 | 0,03-0,15 | 17,0-19,0 | — | ≤1,00 | 0,045 | | [1.4404](/materials/material-no/1.4404 "1.4404") | [1.4404](/materials/material-no/1.4404 "1.4404") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 147 | 10,0-13,0 | ≤0,030 | 16,5-18,2 | 2,00-2,50 | ≤1,00 | 0,045 | | [X2CrNiMo17-12-3](/materials/din-en/x2crnimo17-12-3 "X2CrNiMo17-12-3") | [1.4432](/materials/material-no/1.4432 "1.4432") 1.4 | [Others](/categories/others "Others") | 66 | 10,5-13,0 | ≤0,030 | 16,5-18,5 | 2,50-3,00 | ≤1,00 | 0,045 | | [1.4435](/materials/material-no/1.4435 "1.4435") | [1.4435](/materials/material-no/1.4435 "1.4435") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 99 | 12,5-15,0 | ≤0,030 | 17,0-19,0 | 2,50-3,00 | ≤1,00 | 0,045 | | [1.4438](/materials/material-no/1.4438 "1.4438") | [1.4438](/materials/material-no/1.4438 "1.4438") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 49 | 13,0-16,0 | ≤0,030 | 17,5-19,5 | 3,00-4,00 | ≤1,00 | 0,045 | | [X6CrNiMo19-13-4](/materials/din-en/x6crnimo19-13-4 "X6CrNiMo19-13-4") | [1.4445](/materials/material-no/1.4445 "1.4445") 1.4 | [Others](/categories/others "Others") | 30 | 11,0-15,0 | ≤0,08 | 18,0-20,0 | 3,00-4,00 | ≤1,00 | 0,045 | | [X3CrNiMo18-12-3](/materials/din-en/x3crnimo18-12-3 "X3CrNiMo18-12-3") | [1.4449](/materials/material-no/1.4449 "1.4449") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 35 | 11,5-12,5 | ≤0,035 | 17,0-18,2 | 2,25-2,75 | ≤1,00 | 0,045 | | [X 7 CrNi 23 14](/materials/din-en/x-7-crni-23-14 "X 7 CrNi 23 14") | [1.4833](/materials/material-no/1.4833 "1.4833") 1.4 | [Heat resistant steels](/categories/heat-resistant-steels "Heat resistant steels") | 69 | 12,0-14,0 | ≤0,15 | 22,0-24,0 | — | ≤1,00 | 0,045 | | [X6CrNiSi18-13-4](/materials/din-en/x6crnisi18-13-4 "X6CrNiSi18-13-4") | [1.4884](/materials/material-no/1.4884 "1.4884") 1.4 | [Others](/categories/others "Others") | 34 | 11,5-15,0 | ≤0,08 | 15,0-20,0 | — | 3,00-5,00 | 0,045 | | [X6CrNi23-13](/materials/din-en/x6crni23-13 "X6CrNi23-13") | [1.4950](/materials/material-no/1.4950 "1.4950") 1.4 | [Heat resistant steels](/categories/heat-resistant-steels "Heat resistant steels") | 32 | 12,0-15,0 | 0,04-0,08 | 22,0-24,0 | — | ≤0,70 | 0,035 | ## 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")