--- title: "1.4314 — Special steels for aviation and aerospace" description: "1.4314 is the material number of the grade also listed as S30400. It is a material in the category Special steels for aviation and aerospace." canonical: https://steelequivalents.com/materials/material-no/1.4314 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.4314.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.4314.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.4314.md es: https://steelequivalents.com/es/materiales/número-de-material/1.4314.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.4314.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.4314.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.4314.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.4314.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.4314.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.4314.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.4314.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.4314.md zh: https://steelequivalents.com/zh/材料/材料编号/1.4314.md ja: https://steelequivalents.com/ja/材料/材料番号/1.4314.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.4314.md ko: https://steelequivalents.com/ko/재료/재료번호/1.4314.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.4314.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.4314.md content_hash: sha256:570b3e4cf9ecaec3bf3c233963ca6f3a366366b682364bafa1cd303066625e2b 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/1.4314 > Canonical URL: https://steelequivalents.com/materials/material-no/1.4314 > 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 · 86 designations # 1.4314 1.4314 is the material number of the grade also listed as S30400. It is a material in the category Special steels for aviation and aerospace. We list 86 designations recorded for this grade, in the standards UNS, AISI / SAE, ASTM, SAE AMS and ABNT NBR. - ***Material no.* **1.4314**** - [*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") - *Designations* **86** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=73f71577-75b9-4f4d-b06f-18846e4b9a78 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4314.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS S30400 This grade’s own name · 7 grades on that route](/materials/uns/s30400 "UNS S30400") - [AISI / SAE 304 This grade’s own name · 7 grades on that route](/materials/aisi-sae/304 "AISI / SAE 304") ## About Special steels for aviation and aerospace Special steels for aviation and aerospace are engineered steels designed to provide controlled mechanical properties and reliable performance in demanding service. Their alloying and heat-treatment capabilities support components that require a combination of strength, toughness and fatigue resistance, including aircraft structures and engine parts. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 86 designations · 5 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. UNS United States · 2 - [S30400 This grade’s own name](/materials/uns/s30400 "UNS S30400") - [S30500 Indicative](/materials/uns/s30500 "UNS S30500") AISI / SAE United States · 4 - [30304 Indicative](/materials/aisi-sae/30304 "AISI / SAE 30304") - [30305 Indicative](/materials/aisi-sae/30305 "AISI / SAE 30305") - [304 This grade’s own name](/materials/aisi-sae/304 "AISI / SAE 304") - [305 Indicative](/materials/aisi-sae/305 "AISI / SAE 305") ASTM United States · 59 - [A1012 Indicative](/materials/astm/a1012 "ASTM A1012") - [A1022 Indicative](/materials/astm/a1022 "ASTM A1022") - [A1049 Indicative](/materials/astm/a1049 "ASTM A1049") - [A182 Indicative](/materials/aisi-sae/a182 "ASTM A182") - [A193 Indicative](/materials/astm/a193 "ASTM A193") - [A194 Indicative](/materials/astm/a194 "ASTM A194") - [A213 Indicative](/materials/astm/a213 "ASTM A213") - [A240 Indicative](/materials/astm/a240 "ASTM A240") - [A249 Indicative](/materials/astm/a249 "ASTM A249") - [A269 Indicative](/materials/astm/a269 "ASTM A269") - [A270 Indicative](/materials/astm/a270 "ASTM A270") - [A276 Indicative](/materials/astm/a276 "ASTM A276") - [A312 Indicative](/materials/astm/a312 "ASTM A312") - [A313 Indicative](/materials/astm/a313 "ASTM A313") - [A314 Indicative](/materials/astm/a314 "ASTM A314") - [A320 Indicative](/materials/nbn/a320 "ASTM A320") - [A336 Indicative](/materials/astm/a336 "ASTM A336") - [A358 Indicative](/materials/astm/a358 "ASTM A358") - [A368 Indicative](/materials/astm/a368 "ASTM A368") - [A376 Indicative](/materials/astm/a376 "ASTM A376") - [A403 Indicative](/materials/astm/a403 "ASTM A403") - [A409 Indicative](/materials/astm/a409 "ASTM A409") - [A430 Indicative](/materials/astm/a430 "ASTM A430") - [A473 Indicative](/materials/astm/a473 "ASTM A473") - [A478 Indicative](/materials/astm/a478 "ASTM A478") - [A479 Indicative](/materials/astm/a479 "ASTM A479") - [A492 Indicative](/materials/astm/a492 "ASTM A492") - [A493 Indicative](/materials/astm/a493 "ASTM A493") - [A511 Indicative](/materials/astm/a511 "ASTM A511") - [A554 Indicative](/materials/astm/a554 "ASTM A554") - [A580 Indicative](/materials/astm/a580 "ASTM A580") - [A593 Indicative](/materials/astm/a593 "ASTM A593") - [A632 Indicative](/materials/astm/a632 "ASTM A632") - [A666 Indicative](/materials/astm/a666 "ASTM A666") - [A688 Indicative](/materials/astm/a688 "ASTM A688") - [A738 Indicative](/materials/aisi-sae/a738 "ASTM A738") - [A774 Indicative](/materials/astm/a774 "ASTM A774") - [A793 Indicative](/materials/astm/a793 "ASTM A793") - [A813 Indicative](/materials/astm/a813 "ASTM A813") - [A814 Indicative](/materials/astm/a814 "ASTM A814") - [A836 Indicative](/materials/astm/a836 "ASTM A836") - [A837 Indicative](/materials/astm/a837 "ASTM A837") - [A851 Indicative](/materials/astm/a851 "ASTM A851") - [A879 Indicative](/materials/astm/a879 "ASTM A879") - [A880 Indicative](/materials/astm/a880 "ASTM A880") - [A899 Indicative](/materials/astm/a899 "ASTM A899") - [A908 Indicative](/materials/astm/a908 "ASTM A908") - [A943 Indicative](/materials/astm/a943 "ASTM A943") - [A965 Indicative](/materials/astm/a965 "ASTM A965") - [A988 Indicative](/materials/astm/a988 "ASTM A988") - [F1667 Indicative](/materials/astm/f1667 "ASTM F1667") - [F2215 Indicative](/materials/astm/f2215 "ASTM F2215") - [F593 Indicative](/materials/astm/f593 "ASTM F593") - [F594 Indicative](/materials/astm/f594 "ASTM F594") - [F738 Indicative](/materials/astm/f738 "ASTM F738") - [F836 Indicative](/materials/astm/f836 "ASTM F836") - [F837 Indicative](/materials/astm/f837 "ASTM F837") - [F879 Indicative](/materials/astm/f879 "ASTM F879") - [F880 Indicative](/materials/astm/f880 "ASTM F880") SAE AMS United States / Aerospace · 20 - [5501 Indicative](/materials/ams/5501 "SAE AMS 5501") - [5511 Indicative](/materials/ams/5511 "SAE AMS 5511") - [5513 Indicative](/materials/ams/5513 "SAE AMS 5513") - [5514 Indicative](/materials/ams/5514 "SAE AMS 5514") - [5560 Indicative](/materials/ams/5560 "SAE AMS 5560") - [5563 Indicative](/materials/ams/5563 "SAE AMS 5563") - [5564 Indicative](/materials/ams/5564 "SAE AMS 5564") - [5565 Indicative](/materials/ams/5565 "SAE AMS 5565") - [5566 Indicative](/materials/ams/5566 "SAE AMS 5566") - [5567 Indicative](/materials/ams/5567 "SAE AMS 5567") - [5639 Indicative](/materials/ams/5639 "SAE AMS 5639") - [5685 Indicative](/materials/ams/5685 "SAE AMS 5685") - [5686 Indicative](/materials/ams/5686 "SAE AMS 5686") - [5697 Indicative](/materials/ams/5697 "SAE AMS 5697") - [5857 Indicative](/materials/ams/5857 "SAE AMS 5857") - [5868 Indicative](/materials/ams/5868 "SAE AMS 5868") - [5910 Indicative](/materials/ams/5910 "SAE AMS 5910") - [5911 Indicative](/materials/ams/5911 "SAE AMS 5911") - [5912 Indicative](/materials/ams/5912 "SAE AMS 5912") - [5913 Indicative](/materials/ams/5913 "SAE AMS 5913") ABNT NBR Brazil · 1 - [304 Indicative](/materials/aisi-sae/304 "ABNT NBR 304") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr Ni Mn Iron — the balance, never listed by a standard — 69.4 % Cr — 18 % Ni — 9.5 % Mn — 2 % Traces & impurities · 1.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.07 | | Si | ≤ 1 | | Mn | ≤ 2 | | P | 0.045 | | S | 0.03 | | Cr | 17–19 | | Ni | 8.5–10.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel 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 | ≤0,07 | — | 0.070 | Max | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 17,0-19,0 | 17.000 | 19.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 8,50-10,5 | 8.500 | 10.500 | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: 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 1.4, a shared category, and a published range for Cr / Ni 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. [S30347 1.4544 Cr 17,0-19,0 · Ni 9,00-11,5 - ΔCr 0.00 - ΔNi 0.75 - 69 designations](/materials/uns/s30347 "S30347")[X5CrNiNb18-10 1.4546 Cr 17,0-19,0 · Ni 9,00-11,5 - ΔCr 0.00 - ΔNi 0.75 - 70 designations](/materials/din-en/x5crninb18-10 "X5CrNiNb18-10")[S30100 1.4324 Cr 16,0-18,0 · Ni 7,00-9,00 - ΔCr 1.00 - ΔNi 1.50 - 52 designations](/materials/uns/s30100 "S30100") ## 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=73f71577-75b9-4f4d-b06f-18846e4b9a78 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4314.pdf "Datasheet as PDF")