--- title: "X18CrN28 — Heat resistant steels" description: "X18CrN28 in DIN / EN: material number 1.4749, also listed as X15CrN26. Category: Heat resistant steels. Designations recorded for this grade: 25." canonical: https://steelequivalents.com/materials/din-en/x18crn28 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/x18crn28.md cs: https://steelequivalents.com/cs/materiály/din-en/x18crn28.md de: https://steelequivalents.com/de/werkstoffe/din-en/x18crn28.md es: https://steelequivalents.com/es/materiales/din-en/x18crn28.md fr: https://steelequivalents.com/fr/matériaux/din-en/x18crn28.md hu: https://steelequivalents.com/hu/anyagok/din-en/x18crn28.md it: https://steelequivalents.com/it/materiali/din-en/x18crn28.md nl: https://steelequivalents.com/nl/materialen/din-en/x18crn28.md pl: https://steelequivalents.com/pl/materiały/din-en/x18crn28.md pt: https://steelequivalents.com/pt/materiais/din-en/x18crn28.md ru: https://steelequivalents.com/ru/материалы/din-en/x18crn28.md tr: https://steelequivalents.com/tr/malzemeler/din-en/x18crn28.md zh: https://steelequivalents.com/zh/材料/din-en/x18crn28.md ja: https://steelequivalents.com/ja/材料/din-en/x18crn28.md ar: https://steelequivalents.com/ar/المواد/din-en/x18crn28.md ko: https://steelequivalents.com/ko/재료/din-en/x18crn28.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/x18crn28.md hi: https://steelequivalents.com/hi/सामग्री/din-en/x18crn28.md content_hash: sha256:0d8898dc46aff65e6d02ddba87daef44e12905f2c2b620ca6c5d16caf6c65d24 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/din-en/x18crn28 > Canonical URL: https://steelequivalents.com/materials/din-en/x18crn28 > 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. DIN / EN · Europe · 25 designations # X18CrN28 X18CrN28 is a designation in DIN / EN for the material held under material number 1.4749, also listed as X15CrN26. It is a material in the category Heat resistant steels. We list 25 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, ISO, JIS, GB, GOST, UNI, SS and PN. - [*Material no.* **1.4749**](/materials/material-no/1.4749 "Material no.: 1.4749") - [*Category* **Heat resistant steels · 64 grades**](/categories/heat-resistant-steels "Category: Heat resistant steels · 64 grades") - *Designations* **25** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0662a163-9589-4b0a-8a51-73bb383cc75f&designation=8974d019-76ee-4eff-a7bd-7d875a0fa00b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x18crn28.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X15CrN26 This grade’s own name](/materials/din-en/x15crn26 "DIN / EN X15CrN26") - [UNS S44600 This grade’s own name · 2 grades on that route](/materials/uns/s44600 "UNS S44600") - [AISI / SAE 446 This grade’s own name · 4 grades on that route](/materials/aisi-sae/446 "AISI / SAE 446") ## 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 25 designations · 11 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 - [X15CrN26 This grade’s own name](/materials/din-en/x15crn26 "DIN / EN X15CrN26") - **X18CrN28 This grade’s own name** UNS United States · 1 - [S44600 This grade’s own name](/materials/uns/s44600 "UNS S44600") AISI / SAE United States · 4 - [446 This grade’s own name](/materials/aisi-sae/446 "AISI / SAE 446") - [446-1 Indicative](/materials/aisi-sae/446-1 "AISI / SAE 446-1") - [51446 Indicative](/materials/aisi-sae/51446 "AISI / SAE 51446") - [S44600 Indicative](/materials/uns/s44600 "AISI / SAE S44600") ASTM United States · 9 - [A1012 Indicative](/materials/astm/a1012 "ASTM A1012") - [A176 Indicative](/materials/astm/a176 "ASTM A176") - [A268 Indicative](/materials/astm/a268 "ASTM A268") - [A276 Indicative](/materials/astm/a276 "ASTM A276") - [A314 Indicative](/materials/astm/a314 "ASTM A314") - [A473 Indicative](/materials/astm/a473 "ASTM A473") - [A511 Indicative](/materials/astm/a511 "ASTM A511") - [A580 Indicative](/materials/astm/a580 "ASTM A580") - [A815 Indicative](/materials/astm/a815 "ASTM A815") ISO International · 1 - [X15CrN26 Indicative](/materials/din-en/x15crn26 "ISO X15CrN26") JIS Japan · 1 - [SUH 446 Indicative](/materials/jis/suh446 "JIS SUH 446") GB China · 1 - [2Cr25N Indicative](/materials/gb/2cr25n "GB 2Cr25N") GOST Russia / CIS · 2 - [15Ch25T Indicative](/materials/gost/15ch25t "GOST 15Ch25T") - [15Х25Т Indicative](/materials/gost/15kh25t "GOST 15Х25Т") UNI Italy · 1 - [X16Cr26 Indicative](/materials/uni/x16cr26 "UNI X16Cr26") SS Sweden · 1 - [2322 Indicative](/materials/ss/2322 "SS 2322") PN Poland · 2 - [H25 Indicative](/materials/pn/h25 "PN H25") - [H25T Indicative](/materials/pn/h25t "PN H25T") 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 Si Mn Iron — the balance, never listed by a standard — 70.1 % Cr — 27.5 % Si — 1 % Mn — 1 % Traces & impurities · 0.4 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.15–0.2 | | Si | ≤ 1 | | Mn | ≤ 1 | | P | 0.04 | | S | 0.015 | | Cr | 26–29 — Unusual | | N | 0.15–0.25 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 0,15-0,20 | 0.150 | 0.200 | Range | | N | 0,15-0,25 | 0.150 | 0.250 | Range | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | 26,0-29,0 | 26.000 | 29.000 | Range | | Mn | ≤1,00 | — | 1.000 | Max | 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: Ni, 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. ## Properties by condition 2 conditions · 5 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | Rm N/mm² | Re N/mm² | A% | Z% | |---|---|---|---|---| | Bars/Rods Annealing | 510 | 275 | 20 | 40 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 212 | 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 Cr / Si 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. [X6NiCrNbCe32-27 1.4877 Cr 26,0-28,0 · Si ≤0,30 - ΔCr 0.50 - ΔSi 0.35 - 3 designations](/materials/din-en/x6nicrnbce32-27 "X6NiCrNbCe32-27")[X12CrNi26-5 1.4820 Cr 24,8-27,2 · Si ≤1,40 - ΔCr 1.50 - ΔSi 0.20 - 1 designations](/materials/din-en/x12crni26-5 "X12CrNi26-5")[X15CrNiSi25-4 1.4821 Cr 24,5-26,5 · Si 0,80-1,50 - ΔCr 2.00 - ΔSi 0.65 - 5 designations](/materials/din-en/x15crnisi25-4 "X15CrNiSi25-4")[X6CrNi25-20 1.4951 Cr 24,0-26,0 · Si ≤0,70 - ΔCr 2.50 - ΔSi 0.15 - 34 designations](/materials/din-en/x6crni25-20 "X6CrNi25-20")[1.4845 1.4845 Cr 24,0-26,0 · Si ≤1,50 - ΔCr 2.50 - ΔSi 0.25 - 91 designations](/materials/material-no/1.4845 "1.4845")[X8Cr30 1.4773 Cr 28,8-31,2 · Si ≤1,90 - ΔCr 2.50 - ΔSi 0.45 - 5 designations](/materials/din-en/x8cr30 "X8Cr30") ## 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=0662a163-9589-4b0a-8a51-73bb383cc75f&designation=8974d019-76ee-4eff-a7bd-7d875a0fa00b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x18crn28.pdf "Datasheet as PDF")