--- title: "1.4712 — Heat resistant steels" description: "1.4712 is the material number of the grade also listed as X10CrSi6. Category: Heat resistant steels. Designations recorded for this grade: 4." canonical: https://steelequivalents.com/materials/material-no/1.4712 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.4712.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.4712.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.4712.md es: https://steelequivalents.com/es/materiales/número-de-material/1.4712.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.4712.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.4712.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.4712.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.4712.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.4712.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.4712.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.4712.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.4712.md zh: https://steelequivalents.com/zh/材料/材料编号/1.4712.md ja: https://steelequivalents.com/ja/材料/材料番号/1.4712.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.4712.md ko: https://steelequivalents.com/ko/재료/재료번호/1.4712.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.4712.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.4712.md content_hash: sha256:fae66bae5e126d28f8defcea9e1b08155953d15834893fdaf75f9e8659f08b5f 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/1.4712 > Canonical URL: https://steelequivalents.com/materials/material-no/1.4712 > 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 · 4 designations # 1.4712 1.4712 is the material number of the grade also listed as X10CrSi6. It is a material in the category Heat resistant steels. We list 4 designations recorded for this grade, in the standards DIN / EN, UNS, GOST and PN. - ***Material no.* **1.4712**** - [*Category* **Heat resistant steels · 64 grades**](/categories/heat-resistant-steels "Category: Heat resistant steels · 64 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=a7ee166b-4f16-48ff-afcb-e06e371554f8 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4712.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X10CrSi6 This grade’s own name](/materials/din-en/x10crsi6 "DIN / EN X10CrSi6") - [UNS K51255 This grade’s own name](/materials/uns/k51255 "UNS K51255") ## 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 4 designations · 4 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 - [X10CrSi6 This grade’s own name](/materials/din-en/x10crsi6 "DIN / EN X10CrSi6") UNS United States · 1 - [K51255 This grade’s own name](/materials/uns/k51255 "UNS K51255") GOST Russia / CIS · 1 - [15Х6СЮ Indicative](/materials/gost/15kh6syu "GOST 15Х6СЮ") PN Poland · 1 - [H6S2 Indicative](/materials/pn/h6s2 "PN H6S2") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Cr Si Mn Iron — the balance, never listed by a standard — 90.6 % Cr — 6 % Si — 2.3 % Mn — 1 % Traces & impurities · 0.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.12 | | Si | 2–2.5 | | Mn | ≤ 1 | | P | 0.045 | | S | 0.03 | | Cr | 5.5–6.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | ≤0,12 | — | 0.120 | Max | | Si | 2,00-2,50 | 2.000 | 2.500 | Range | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 5,50-6,50 | 5.500 | 6.500 | 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. ## 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=a7ee166b-4f16-48ff-afcb-e06e371554f8 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4712.pdf "Datasheet as PDF")