--- title: "S17480 — Special steels for aviation and aerospace" description: "S17480 in UNS: material number 1.4548, also listed as X5CrNiCuNb17-4-4. It is a material in the category Special steels for aviation and aerospace." canonical: https://steelequivalents.com/materials/uns/s17480 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/s17480.md cs: https://steelequivalents.com/cs/materiály/uns/s17480.md de: https://steelequivalents.com/de/werkstoffe/uns/s17480.md es: https://steelequivalents.com/es/materiales/uns/s17480.md fr: https://steelequivalents.com/fr/matériaux/uns/s17480.md hu: https://steelequivalents.com/hu/anyagok/uns/s17480.md it: https://steelequivalents.com/it/materiali/uns/s17480.md nl: https://steelequivalents.com/nl/materialen/uns/s17480.md pl: https://steelequivalents.com/pl/materiały/uns/s17480.md pt: https://steelequivalents.com/pt/materiais/uns/s17480.md ru: https://steelequivalents.com/ru/материалы/uns/s17480.md tr: https://steelequivalents.com/tr/malzemeler/uns/s17480.md zh: https://steelequivalents.com/zh/材料/uns/s17480.md ja: https://steelequivalents.com/ja/材料/uns/s17480.md ar: https://steelequivalents.com/ar/المواد/uns/s17480.md ko: https://steelequivalents.com/ko/재료/uns/s17480.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/s17480.md hi: https://steelequivalents.com/hi/सामग्री/uns/s17480.md content_hash: sha256:62ee3998d8b0421daccb5e40fef6e93d0bfd214b14993967fd365c284895ab7e 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/s17480 > Canonical URL: https://steelequivalents.com/materials/uns/s17480 > 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 · 21 designations # S17480 S17480 is a designation in UNS for the material held under material number 1.4548, also listed as X5CrNiCuNb17-4-4. It is a material in the category Special steels for aviation and aerospace. We list 21 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM and SAE AMS. - [*Material no.* **1.4548**](/materials/material-no/1.4548 "Material no.: 1.4548") - [*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* **21** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=44fb40c5-f153-4b36-aa1a-7bb8175fa06f&designation=12491442-3915-4b29-b81c-f53b4ce274db "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/s17480.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X5CrNiCuNb17-4-4 This grade’s own name](/materials/din-en/x5crnicunb17-4-4 "DIN / EN X5CrNiCuNb17-4-4") - [UNS S17400 This grade’s own name · 3 grades on that route](/materials/uns/s17400 "UNS S17400") - [AISI / SAE 630 This grade’s own name · 3 grades on that route](/materials/aisi-sae/630 "AISI / SAE 630") ## 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 21 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. DIN / EN Europe · 1 - [X5CrNiCuNb17-4-4 This grade’s own name](/materials/din-en/x5crnicunb17-4-4 "DIN / EN X5CrNiCuNb17-4-4") UNS United States · 2 - [S17400 This grade’s own name](/materials/uns/s17400 "UNS S17400") - **S17480 This grade’s own name** AISI / SAE United States · 2 - [17-4PH Indicative](/materials/aisi-sae/17-4ph "AISI / SAE 17-4PH") - [630 This grade’s own name](/materials/aisi-sae/630 "AISI / SAE 630") ASTM United States · 11 - [A1028 Indicative](/materials/astm/a1028 "ASTM A1028") - [A564 Indicative](/materials/astm/a564 "ASTM A564") - [A564 Type 630 Indicative](/materials/astm/a564-type-630 "ASTM A564 Type 630") - [A693 Indicative](/materials/astm/a693 "ASTM A693") - [A705 Indicative](/materials/astm/a705 "ASTM A705") - [A982 Indicative](/materials/astm/a982 "ASTM A982") - [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") - [F899 Indicative](/materials/astm/f899 "ASTM F899") SAE AMS United States / Aerospace · 5 - [5604 Indicative](/materials/ams/5604 "SAE AMS 5604") - [5622 Indicative](/materials/ams/5622 "SAE AMS 5622") - [5643 Indicative](/materials/ams/5643 "SAE AMS 5643") - [5825 Indicative](/materials/ams/5825 "SAE AMS 5825") - [5827 Indicative](/materials/ams/5827 "SAE AMS 5827") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Ni Cu Iron — the balance, never listed by a standard — 73.3 % Cr — 16.3 % Ni — 4 % Cu — 4 % Traces & impurities · 2.4 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.07 | | Si | ≤ 1 | | Mn | ≤ 1 | | P | 0.025 | | S | 0.025 | | Cr | 15–17.5 | | Ni | 3–5 | | Cu | 3–5 — Unusual | | Nb | 0.15–0.45 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel Copper Niobium 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 | 0,025 | 0.025 | 0.025 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Cr | 15,0-17,5 | 15.000 | 17.500 | Range | | Mn | ≤1,00 | — | 1.000 | Max | | Ni | 3,00-5,00 | 3.000 | 5.000 | Range | | Cu | 3,00-5,00 | 3.000 | 5.000 | Range | | Nb | 0,15-,045 | 0.150 | 0.450 | 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. [GX5CrNiCuNb16-4 1.4549 Cr 15,5-16,7 · Ni 3,60-4,60 - ΔCr 0.15 - ΔNi 0.10 - 2 designations](/materials/din-en/gx5crnicunb16-4 "GX5CrNiCuNb16-4")[X5CrNiCu15-5 1.4545 Cr 15,0-15,5 · Ni 3,00-5,50 - ΔCr 1.00 - ΔNi 0.25 - 12 designations](/materials/din-en/x5crnicu15-5 "X5CrNiCu15-5")[X15CrNi17-3 1.4044 Cr 15,0-18,0 · Ni 2,00-3,00 - ΔCr 0.25 - ΔNi 1.50 - 33 designations](/materials/din-en/x15crni17-3 "X15CrNi17-3") ## 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=44fb40c5-f153-4b36-aa1a-7bb8175fa06f&designation=12491442-3915-4b29-b81c-f53b4ce274db "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/s17480.pdf "Datasheet as PDF")