--- title: "Č.4579 — Heat resistant steels" description: "Č.4579 in JUS: material number 1.4864, also listed as X12NiCrSi35-16. Category: Heat resistant steels. Designations recorded for this grade: 26." canonical: https://steelequivalents.com/materials/jus/c-4579 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jus/c-4579.md cs: https://steelequivalents.com/cs/materiály/jus/c-4579.md de: https://steelequivalents.com/de/werkstoffe/jus/c-4579.md es: https://steelequivalents.com/es/materiales/jus/c-4579.md fr: https://steelequivalents.com/fr/matériaux/jus/c-4579.md hu: https://steelequivalents.com/hu/anyagok/jus/c-4579.md it: https://steelequivalents.com/it/materiali/jus/c-4579.md nl: https://steelequivalents.com/nl/materialen/jus/c-4579.md pl: https://steelequivalents.com/pl/materiały/jus/c-4579.md pt: https://steelequivalents.com/pt/materiais/jus/c-4579.md ru: https://steelequivalents.com/ru/материалы/jus/c-4579.md tr: https://steelequivalents.com/tr/malzemeler/jus/c-4579.md zh: https://steelequivalents.com/zh/材料/jus/c-4579.md ja: https://steelequivalents.com/ja/材料/jus/c-4579.md ar: https://steelequivalents.com/ar/المواد/jus/c-4579.md ko: https://steelequivalents.com/ko/재료/jus/c-4579.md pt-br: https://steelequivalents.com/pt-br/materiais/jus/c-4579.md hi: https://steelequivalents.com/hi/सामग्री/jus/c-4579.md content_hash: sha256:a0b64c7b804b65715255f08df4fa4b20ed2f3500345a897be691a01e00e90fdb 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/jus/c-4579 > Canonical URL: https://steelequivalents.com/materials/jus/c-4579 > 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. JUS · former Yugoslavia · 26 designations # Č.4579 Č.4579 is a designation in JUS for the material held under material number 1.4864, also listed as X12NiCrSi35-16. It is a material in the category Heat resistant steels. We list 26 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, JIS, GB, GOST, ČSN, JUS, PN and STAS. - [*Material no.* **1.4864**](/materials/material-no/1.4864 "Material no.: 1.4864") - [*Category* **Heat resistant steels · 64 grades**](/categories/heat-resistant-steels "Category: Heat resistant steels · 64 grades") - *Designations* **26** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=7436792f-1a76-453d-b970-d2cb0863037a&designation=5fc068e7-fba9-4de8-8469-94250db3a166 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jus/c-4579.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X12NiCrSi35-16 This grade’s own name](/materials/din-en/x12nicrsi35-16 "DIN / EN X12NiCrSi35-16") ## About Heat resistant steels Heat resistant steels are alloyed materials designed to retain useful mechanical properties and resist oxidation or scaling during service at elevated temperatures. They are used for components in furnaces, boilers, heat exchangers and power-generation equipment exposed to hot gases or sustained heat. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 26 designations · 15 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 · 4 - [1.4864 Indicative](/materials/material-no/1.4864 "DIN / EN 1.4864") - [X12NiCrSi35-16 This grade’s own name](/materials/din-en/x12nicrsi35-16 "DIN / EN X12NiCrSi35-16") - [X12NiCrSi36-16 This grade’s own name Withdrawn](/materials/din-en/x12nicrsi36-16 "DIN / EN X12NiCrSi36-16") - [X13NiCr35-16 This grade’s own name](/materials/din-en/x13nicr35-16 "DIN / EN X13NiCr35-16") UNS United States · 2 - [N08303 Indicative](/materials/uns/n08303 "UNS N08303") - [N08330 Indicative](/materials/uns/n08330 "UNS N08330") AISI / SAE United States · 2 - [330 Indicative](/materials/aisi-sae/330 "AISI / SAE 330") - [N08330 Indicative](/materials/uns/n08330 "AISI / SAE N08330") ASTM United States · 1 - [N08330 Indicative](/materials/uns/n08330 "ASTM N08330") BS United Kingdom · 3 - [3076 NA 17 Indicative](/materials/bs/3076-na-17 "BS 3076 NA 17") - [INCOLOY alloy DS Indicative](/materials/bs/incoloy-alloy-ds "BS INCOLOY alloy DS") - [NA17 Indicative](/materials/bs/na17 "BS NA17") AFNOR France · 4 - [Z12NCS35.16 Indicative](/materials/afnor/z12ncs35-16 "AFNOR Z12NCS35.16") - [Z12NCS37-18 Indicative](/materials/afnor/z12ncs37-18 "AFNOR Z12NCS37-18") - [Z20NCS33-16 Indicative](/materials/afnor/z20ncs33-16 "AFNOR Z20NCS33-16") - [ZI2NCS37.18 Indicative](/materials/afnor/zi2ncs37-18 "AFNOR ZI2NCS37.18") UNE Spain · 2 - [F.3313 Indicative](/materials/une/f-3313 "UNE F.3313") - [F.3313-X 12 CrNi 36-16 Indicative](/materials/une/f-3313-x-12-crni-36-16 "UNE F.3313-X 12 CrNi 36-16") ISO International · 1 - [H17 Indicative](/materials/pn/h17 "ISO H17") JIS Japan · 1 - [SUH330 Indicative](/materials/jis/suh330 "JIS SUH330") GB China · 1 - [1Cr16Ni35 Indicative](/materials/gb/1cr16ni35 "GB 1Cr16Ni35") GOST Russia / CIS · 1 - [ХН35ВТ Indicative](/materials/gost/khn35vt "GOST ХН35ВТ") ČSN Czechia · 1 - [17 253 Indicative](/materials/csn/17253 "ČSN 17 253") JUS former Yugoslavia · 1 - **Č.4579 Indicative** PN Poland · 1 - [H16N36S2 Indicative](/materials/pn/h16n36s2 "PN H16N36S2") STAS Romania · 1 - [12SiCrNi360 Indicative](/materials/stas/12sicrni360 "STAS 12SiCrNi360") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 8 elements on file · weight % What this alloy is Fe Ni Cr Mn Iron — the balance, never listed by a standard — 45.2 % Ni — 35 % Cr — 16 % Mn — 2 % Traces & impurities · 1.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.15 | | Si | 1–2 | | Mn | ≤ 2 | | P | 0.045 | | S | 0.015 | | Cr | 15–17 | | Ni | 33–37 | | N | 0.11 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel Nitrogen 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 | ≤0,15 | — | 0.150 | Max | | N | 0,11 | 0.110 | 0.110 | Exact | | Si | 1,00-2,00 | 1.000 | 2.000 | Range | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | 15,0-17,0 | 15.000 | 17.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 33,0-37,0 | 33.000 | 37.000 | 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 8 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. ## Properties by condition 1 conditions · 1 values By delivery state**Solution annealed** source `steelnumber` | Delivery state | HB | |---|---| | Solution annealed | 223 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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. [X8NiCrSi38-18 1.4862 Ni 35,0-39,0 · Cr 17,0-19,0 - ΔNi 2.00 - ΔCr 2.00 - 7 designations](/materials/din-en/x8nicrsi38-18 "X8NiCrSi38-18") ## 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=7436792f-1a76-453d-b970-d2cb0863037a&designation=5fc068e7-fba9-4de8-8469-94250db3a166 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jus/c-4579.pdf "Datasheet as PDF")