--- title: "1.8519 — Nitriding steels" description: "1.8519 is the material number of the grade also listed as 31CrMoV9. It is a material in the category Nitriding steels. Designations recorded for this grade: 8." canonical: https://steelequivalents.com/materials/material-no/1.8519 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.8519.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.8519.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.8519.md es: https://steelequivalents.com/es/materiales/número-de-material/1.8519.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.8519.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.8519.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.8519.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.8519.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.8519.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.8519.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.8519.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.8519.md zh: https://steelequivalents.com/zh/材料/材料编号/1.8519.md ja: https://steelequivalents.com/ja/材料/材料番号/1.8519.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.8519.md ko: https://steelequivalents.com/ko/재료/재료번호/1.8519.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.8519.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.8519.md content_hash: sha256:93708e9372b1e90f8728437105b293da55b23c235e278eeed01b10b1b273d234 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/1.8519 > Canonical URL: https://steelequivalents.com/materials/material-no/1.8519 > 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 · 8 designations # 1.8519 1.8519 is the material number of the grade also listed as 31CrMoV9. It is a material in the category Nitriding steels. We list 8 designations recorded for this grade, in the standards DIN / EN, GOST, ČSN, STN, PN and SRPS. - ***Material no.* **1.8519**** - [*Category* **Nitriding steels · 11 grades**](/categories/nitriding-steels "Category: Nitriding steels · 11 grades") - *Designations* **8** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=4aa13d35-c004-499d-851f-1e3b757b1caf "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.8519.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 31CrMoV9 This grade’s own name](/materials/din-en/31crmov9 "DIN / EN 31CrMoV9") ## About Nitriding steels Nitriding steels are alloy steels designed for nitriding, a surface-hardening treatment that produces a hard, wear-resistant surface while retaining a tough supporting core. They are used for gears, shafts, dies and other components requiring resistance to wear, repeated loading and dimensional change in service. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 8 designations · 6 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 - [31CrMoV9 This grade’s own name](/materials/din-en/31crmov9 "DIN / EN 31CrMoV9") GOST Russia / CIS · 2 - [30Ch3MF Indicative](/materials/gost/30ch3mf "GOST 30Ch3MF") - [30Х3МФ Indicative](/materials/gost/30kh3mf "GOST 30Х3МФ") ČSN Czechia · 1 - [15330 Indicative](/materials/csn/15330 "ČSN 15330") STN Slovakia · 1 - [15 330 Indicative](/materials/csn/15330 "STN 15 330") PN Poland · 2 - [30H2MF Indicative](/materials/pn/30h2mf "PN 30H2MF") - [33H3MF Indicative](/materials/pn/33h3mf "PN 33H3MF") SRPS Serbia · 1 - [Č.4730.4 Indicative](/materials/srps/c-4730-4 "SRPS Č.4730.4") 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 Cr Mn Si Iron — the balance, never listed by a standard — 95.8 % Cr — 2.5 % Mn — 0.6 % Si — 0.4 % Traces & impurities · 0.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.27–0.34 | | Si | ≤ 0.4 | | Mn | 0.4–0.7 | | P | 0.025 | | S | 0.035 | | Cr | 2.3–2.7 | | Mo | 0.15–0.25 | | V | 0.1–0.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Vanadium 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 | 0,27-0,34 | 0.270 | 0.340 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | V | 0,10-0,20 | 0.100 | 0.200 | Range | | Cr | 2,30-2,70 | 2.300 | 2.700 | Range | | Mn | 0,40-0,70 | 0.400 | 0.700 | Range | | Mo | 0,15-0,25 | 0.150 | 0.250 | 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: Ni. ## Physical & mechanical properties Density 7,73 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 · 9 values By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 16 – 40 | 1100 – 1300 | 9 | | 40 – 100 | 1000 – 1200 | 10 | | 100 – 160 | 900 – 1100 | 11 | | 160 – 250 | 850 – 1050 | 12 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 248 | 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. ## 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=4aa13d35-c004-499d-851f-1e3b757b1caf "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.8519.pdf "Datasheet as PDF")