--- title: "X53CrMnNiNbN21-9 — Valve steels" description: "X53CrMnNiNbN21-9: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/x53crmnninbn21-9 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/x53crmnninbn21-9.md cs: https://steelequivalents.com/cs/materiály/din-en/x53crmnninbn21-9.md de: https://steelequivalents.com/de/werkstoffe/din-en/x53crmnninbn21-9.md es: https://steelequivalents.com/es/materiales/din-en/x53crmnninbn21-9.md fr: https://steelequivalents.com/fr/matériaux/din-en/x53crmnninbn21-9.md hu: https://steelequivalents.com/hu/anyagok/din-en/x53crmnninbn21-9.md it: https://steelequivalents.com/it/materiali/din-en/x53crmnninbn21-9.md nl: https://steelequivalents.com/nl/materialen/din-en/x53crmnninbn21-9.md pl: https://steelequivalents.com/pl/materiały/din-en/x53crmnninbn21-9.md pt: https://steelequivalents.com/pt/materiais/din-en/x53crmnninbn21-9.md ru: https://steelequivalents.com/ru/материалы/din-en/x53crmnninbn21-9.md tr: https://steelequivalents.com/tr/malzemeler/din-en/x53crmnninbn21-9.md zh: https://steelequivalents.com/zh/材料/din-en/x53crmnninbn21-9.md ja: https://steelequivalents.com/ja/材料/din-en/x53crmnninbn21-9.md ar: https://steelequivalents.com/ar/المواد/din-en/x53crmnninbn21-9.md ko: https://steelequivalents.com/ko/재료/din-en/x53crmnninbn21-9.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/x53crmnninbn21-9.md hi: https://steelequivalents.com/hi/सामग्री/din-en/x53crmnninbn21-9.md content_hash: sha256:536ea87a390a5874b07c61e9e42dcb12d74959604c3498be5cdf45a86fc91892 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/din-en/x53crmnninbn21-9 > Canonical URL: https://steelequivalents.com/materials/din-en/x53crmnninbn21-9 > 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 · 1 designation # X53CrMnNiNbN21-9 X53CrMnNiNbN21-9 is a material in the category [Valve steels](/categories/valve-steels "Valve steels"), held under material number 1.4870. Its recorded composition includes C 0.48–0.58%, Cr 20–22%, Mn 8–10%, Ni 3.25–4.5% and Nb 2–3%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HRC 30. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.4870**](/materials/material-no/1.4870 "Material no.: 1.4870") - [*Category* **Valve steels · 14 grades**](/categories/valve-steels "Category: Valve steels · 14 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=4be44597-ce99-4328-bb35-8795542feeef&designation=66aa328c-d502-4360-96f0-8e1b4cd7600e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x53crmnninbn21-9.pdf "Datasheet as PDF") ## About Valve steels Valve steels are alloy steels developed for valve components exposed to heat, pressure, wear, and corrosive service conditions. They are characterised by combinations of strength, hardness, toughness, and resistance to oxidation or corrosion suited to the operating environment. Typical uses include engine valves and industrial valve parts where reliable performance and dimensional stability are required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Mn Ni Iron — the balance, never listed by a standard — 62.1 % Cr — 21 % Mn — 9 % Ni — 3.9 % Traces & impurities · 4 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.48–0.58 | | Si | ≤ 0.45 | | Mn | 8–10 — Unusual | | P | 0.045 | | S | 0.03 | | Cr | 20–22 | | Ni | 3.25–4.5 | | Nb | 2–3 — Unusual | | N | 0.38–0.5 — Unusual | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel Niobium 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 | 0,48-0,58 | 0.480 | 0.580 | Range | | N | 0,38-0,50 | 0.380 | 0.500 | Range | | Si | ≤0,45 | — | 0.450 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 20,0-22,0 | 20.000 | 22.000 | Range | | Mn | 8,00-10,0 | 8.000 | 10.000 | Range | | Ni | 3,25-4,50 | 3.250 | 4.500 | Range | | Nb | 2,00-3,00 | 2.000 | 3.000 | Range | - C+N≥0,90 - C+N≥0,90 - C+N≥0,90 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. ## Properties by condition 1 conditions · 1 values By delivery state**Solution annealed** source `steelnumber` | Delivery state | HRC | |---|---| | Solution annealed | 30 | 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 / Mn 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. [1.4871 1.4871 Cr 20,0-22,0 · Mn 8,00-10,0 - ΔCr 0.00 - ΔMn 0.00 - 37 designations](/materials/material-no/1.4871 "1.4871")[X50CrMnNiNbN21-9 1.4882 Cr 20,0-22,0 · Mn 8,00-10,0 - ΔCr 0.00 - ΔMn 0.00 - 2 designations](/materials/din-en/x50crmnninbn21-9 "X50CrMnNiNbN21-9")[X55CrMnNiN20-8 1.4875 Cr 19,5-21,5 · Mn 7,00-10,0 - ΔCr 0.50 - ΔMn 0.50 - 6 designations](/materials/din-en/x55crmnnin20-8 "X55CrMnNiN20-8")[X60CrMnMoVNbN21-10 1.4785 Cr 20,0-22,0 · Mn 9,50-11,5 - ΔCr 0.00 - ΔMn 1.50 - 1 designations](/materials/din-en/x60crmnmovnbn21-10 "X60CrMnMoVNbN21-10") ## 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=4be44597-ce99-4328-bb35-8795542feeef&designation=66aa328c-d502-4360-96f0-8e1b4cd7600e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x53crmnninbn21-9.pdf "Datasheet as PDF")