--- title: "X2CrNiMoN18-12-4 — Stainless steels" description: "X2CrNiMoN18-12-4: 8 equivalent designations across 5 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/x2crnimon18-12-4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/x2crnimon18-12-4.md cs: https://steelequivalents.com/cs/materiály/din-en/x2crnimon18-12-4.md de: https://steelequivalents.com/de/werkstoffe/din-en/x2crnimon18-12-4.md es: https://steelequivalents.com/es/materiales/din-en/x2crnimon18-12-4.md fr: https://steelequivalents.com/fr/matériaux/din-en/x2crnimon18-12-4.md hu: https://steelequivalents.com/hu/anyagok/din-en/x2crnimon18-12-4.md it: https://steelequivalents.com/it/materiali/din-en/x2crnimon18-12-4.md nl: https://steelequivalents.com/nl/materialen/din-en/x2crnimon18-12-4.md pl: https://steelequivalents.com/pl/materiały/din-en/x2crnimon18-12-4.md pt: https://steelequivalents.com/pt/materiais/din-en/x2crnimon18-12-4.md ru: https://steelequivalents.com/ru/материалы/din-en/x2crnimon18-12-4.md tr: https://steelequivalents.com/tr/malzemeler/din-en/x2crnimon18-12-4.md zh: https://steelequivalents.com/zh/材料/din-en/x2crnimon18-12-4.md ja: https://steelequivalents.com/ja/材料/din-en/x2crnimon18-12-4.md ar: https://steelequivalents.com/ar/المواد/din-en/x2crnimon18-12-4.md ko: https://steelequivalents.com/ko/재료/din-en/x2crnimon18-12-4.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/x2crnimon18-12-4.md hi: https://steelequivalents.com/hi/सामग्री/din-en/x2crnimon18-12-4.md content_hash: sha256:27f7917c17130628d6835fb460bef8c75555e4d451d18a7e762bde50c932c9ba 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/x2crnimon18-12-4 > Canonical URL: https://steelequivalents.com/materials/din-en/x2crnimon18-12-4 > 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 · 8 designations # X2CrNiMoN18-12-4 X2CrNiMoN18-12-4 is a material in the category [Stainless steels](/categories/stainless-steels "Stainless steels"), held under material number 1.4434. Its recorded composition includes C ≤ 0.03%, Cr 16.5–19.5%, Mn ≤ 2%, Ni 10.5–14% and Mo 3–4%. We list 7 designations recorded for this grade, in the standards UNS, AISI / SAE, AFNOR and JIS. Recorded mechanical properties include Rm 550 N/mm², Re 245 N/mm², A 40% and HB 217. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.4434**](/materials/material-no/1.4434 "Material no.: 1.4434") - [*Category* **Stainless steels · 468 grades**](/categories/stainless-steels "Category: Stainless steels · 468 grades") - *Designations* **8** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=8c1d4bd4-8504-4eb0-8bf4-44b9594f70eb&designation=701c9025-c700-49b6-8976-c774dd2a863a "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x2crnimon18-12-4.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS S31753 This grade’s own name · 2 grades on that route](/materials/uns/s31753 "UNS S31753") - [AISI / SAE 317LN This grade’s own name · 3 grades on that route](/materials/aisi-sae/317ln "AISI / SAE 317LN") ## About Stainless steels Stainless steels are corrosion-resistant alloy steels whose chromium content promotes a protective passive surface film. They are used for equipment, structures and components exposed to moisture, chemicals or hygienic service, with different alloy compositions selected for corrosion resistance, strength, formability or weldability. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 8 designations · 5 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 - **X2CrNiMoN18-12-4 This grade’s own name** UNS United States · 2 - [S31726 Indicative](/materials/uns/s31726 "UNS S31726") - [S31753 This grade’s own name](/materials/uns/s31753 "UNS S31753") AISI / SAE United States · 3 - [317LMN Indicative](/materials/aisi-sae/317lmn "AISI / SAE 317LMN") - [317LN This grade’s own name](/materials/aisi-sae/317ln "AISI / SAE 317LN") - [S31753 Indicative](/materials/uns/s31753 "AISI / SAE S31753") AFNOR France · 1 - [Z3CND18-14-05Az Indicative](/materials/afnor/z3cnd18-14-05az "AFNOR Z3CND18-14-05Az") JIS Japan · 1 - [SUS317LN Indicative](/materials/jis/sus317ln "JIS SUS317LN") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Ni Mo Iron — the balance, never listed by a standard — 63 % Cr — 18 % Ni — 12.3 % Mo — 3.5 % Traces & impurities · 3.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.03 | | Si | ≤ 1 | | Mn | ≤ 2 | | P | 0.045 | | S | 0.015 | | Cr | 16.5–19.5 | | Mo | 3–4 | | Ni | 10.5–14 | | N | 0.1–0.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 | ≤0,030 | — | 0.030 | Max | | N | 0,10-0,20 | 0.100 | 0.200 | Range | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | 16,5-19,5 | 16.500 | 19.500 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 10,5-14,0 | 10.500 | 14.000 | Range | | Mo | 3,00-4,00 | 3.000 | 4.000 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## 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 · 6 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | Rm N/mm² | Re N/mm² | A% | HB | HRB | HV | |---|---|---|---|---|---|---| | Plate/Sheet Hot-rolled | 550 | 245 | 40 | — | — | — | | Hot-rolled | — | — | — | 217 | 95 | 220 | 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 / Ni 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. [X4CrNi18-12 1.4303 Cr 17,0-19,0 · Ni 11,0-13,0 - ΔCr 0.00 - ΔNi 0.25 - 84 designations](/materials/din-en/x4crni18-12 "X4CrNi18-12")[X1CrNiMoTi18-13-2 1.4561 Cr 17,0-18,5 · Ni 11,5-13,5 - ΔCr 0.25 - ΔNi 0.25 - 3 designations](/materials/din-en/x1crnimoti18-13-2 "X1CrNiMoTi18-13-2")[X3CrNiMo18-12-3 1.4449 Cr 17,0-18,2 · Ni 11,5-12,5 - ΔCr 0.40 - ΔNi 0.25 - 35 designations](/materials/din-en/x3crnimo18-12-3 "X3CrNiMo18-12-3")[1.4429 1.4429 Cr 16,5-18,5 · Ni 11,0-14,0 - ΔCr 0.50 - ΔNi 0.25 - 62 designations](/materials/material-no/1.4429 "1.4429")[X2CrNiMo19-12 1.4430 Cr 17,2-19,8 · Ni 10,7-13,3 - ΔCr 0.50 - ΔNi 0.25 - 2 designations](/materials/din-en/x2crnimo19-12 "X2CrNiMo19-12")[1.4571 1.4571 Cr 16,5-18,5 · Ni 10,5-13,5 - ΔCr 0.50 - ΔNi 0.25 - 72 designations](/materials/material-no/1.4571 "1.4571") ## 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=8c1d4bd4-8504-4eb0-8bf4-44b9594f70eb&designation=701c9025-c700-49b6-8976-c774dd2a863a "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x2crnimon18-12-4.pdf "Datasheet as PDF")