--- title: "1.4657 — Nickel and cobalt alloys" description: "1.4657 is the material number of the grade also listed as X4NiCrCuMo 35-20-4-3. It is a material in the category Nickel and cobalt alloys." canonical: https://steelequivalents.com/materials/material-no/1.4657 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.4657.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.4657.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.4657.md es: https://steelequivalents.com/es/materiales/número-de-material/1.4657.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.4657.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.4657.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.4657.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.4657.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.4657.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.4657.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.4657.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.4657.md zh: https://steelequivalents.com/zh/材料/材料编号/1.4657.md ja: https://steelequivalents.com/ja/材料/材料番号/1.4657.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.4657.md ko: https://steelequivalents.com/ko/재료/재료번호/1.4657.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.4657.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.4657.md content_hash: sha256:6b3a0648ce95c8b6404ac9e83b868f4942957539f328e89389e9f9bbec14f675 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/1.4657 > Canonical URL: https://steelequivalents.com/materials/material-no/1.4657 > 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 # 1.4657 1.4657 is the material number of the grade also listed as X4NiCrCuMo 35-20-4-3. It is a material in the category Nickel and cobalt alloys. We list 3 designations recorded for this grade, in the standards DIN / EN and UNS. - ***Material no.* **1.4657**** - [*Category* **Nickel and cobalt alloys · 87 grades**](/categories/nickel-and-cobalt-alloys "Category: Nickel and cobalt alloys · 87 grades") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **3** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=37425b29-6246-427f-b847-7db31dc86003 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4657.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X4NiCrCuMo 35-20-4-3 This grade’s own name](/materials/din-en/x4nicrcumo35-20-4-3 "DIN / EN X4NiCrCuMo 35-20-4-3") - [UNS N08020 This grade’s own name · 2 grades on that route](/materials/uns/n08020 "UNS N08020") ## About Nickel and cobalt alloys Nickel and cobalt alloys are metallic materials whose properties are developed through nickel-, cobalt-, or combined alloying systems. They are characterised by strong resistance to corrosion, oxidation, wear, and loss of strength at elevated temperatures, making them suitable for turbine components, chemical-processing equipment, and other demanding high-temperature applications. 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 · 2 - [X4NiCrCuMo 35-20-4-3 This grade’s own name](/materials/din-en/x4nicrcumo35-20-4-3 "DIN / EN X4NiCrCuMo 35-20-4-3") - [X4NiCrCuMo35-20-4-3 This grade’s own name](/materials/din-en/x4nicrcumo35-20-4-3 "DIN / EN X4NiCrCuMo35-20-4-3") UNS United States · 1 - [N08020 This grade’s own name](/materials/uns/n08020 "UNS N08020") 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 Ni Cr Cu Iron — the balance, never listed by a standard — 35.8 % Ni — 35 % Cr — 20 % Cu — 3.5 % Traces & impurities · 5.7 % 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 — Unusual | | S | 0.035 — Unusual | | Cr | 19–21 | | Mo | 2–3 | | Ni | 32–38 | | Cu | 3–4 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper 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 | 0,035 | 0.035 | 0.035 | Exact | | Cr | 19,0-21,0 | 19.000 | 21.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 32,0-38,0 | 32.000 | 38.000 | Range | | Cu | 3,00-4,00 | 3.000 | 4.000 | Range | | Mo | 2,00-3,00 | 2.000 | 3.000 | Range | - 8xC≤1,00 - 8xC≤1,00 - 8xC≤1,00 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## 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 Ni / Cr 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. [GX40NiCrSiNb35-18 1.4807 Ni 34,0-36,0 · Cr 17,0-20,0 - ΔNi 0.00 - ΔCr 1.50 - 1 designations](/materials/din-en/gx40nicrsinb35-18 "GX40NiCrSiNb35-18")[X10NiCrSi35-19 1.4886 Ni 33,0-37,0 · Cr 17,0-20,0 - ΔNi 0.00 - ΔCr 1.50 - 21 designations](/materials/din-en/x10nicrsi35-19 "X10NiCrSi35-19")[X10NiCrSiNb35-22 1.4887 Ni 33,0-37,0 · Cr 20,0-23,0 - ΔNi 0.00 - ΔCr 1.50 - 1 designations](/materials/din-en/x10nicrsinb35-22 "X10NiCrSiNb35-22")[X12NiCr36-18 1.4863 Ni 33,5-37,5 · Cr 17,2-19,8 - ΔNi 0.50 - ΔCr 1.50 - 1 designations](/materials/din-en/x12nicr36-18 "X12NiCr36-18")[X 5 NiCr 32 21 1.4333 Ni 30,0-34,0 · Cr 19,0-22,0 - ΔNi 3.00 - ΔCr 0.50 - 5 designations](/materials/din-en/x-5-nicr-32-21 "X 5 NiCr 32 21")[X15NiCrNb32-21 1.4850 Ni 31,0-34,0 · Cr 20,0-22,0 - ΔNi 2.50 - ΔCr 1.00 - 1 designations](/materials/din-en/x15nicrnb32-21 "X15NiCrNb32-21") ## 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=37425b29-6246-427f-b847-7db31dc86003 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4657.pdf "Datasheet as PDF")