--- title: "X108CrMo17 — Bearing steels" description: "X108CrMo17 in DIN / EN: material number 1.3543, also listed as X102CrMo17. Category: Bearing steels. Designations recorded for this grade: 15." canonical: https://steelequivalents.com/materials/din-en/x108crmo17 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/x108crmo17.md cs: https://steelequivalents.com/cs/materiály/din-en/x108crmo17.md de: https://steelequivalents.com/de/werkstoffe/din-en/x108crmo17.md es: https://steelequivalents.com/es/materiales/din-en/x108crmo17.md fr: https://steelequivalents.com/fr/matériaux/din-en/x108crmo17.md hu: https://steelequivalents.com/hu/anyagok/din-en/x108crmo17.md it: https://steelequivalents.com/it/materiali/din-en/x108crmo17.md nl: https://steelequivalents.com/nl/materialen/din-en/x108crmo17.md pl: https://steelequivalents.com/pl/materiały/din-en/x108crmo17.md pt: https://steelequivalents.com/pt/materiais/din-en/x108crmo17.md ru: https://steelequivalents.com/ru/материалы/din-en/x108crmo17.md tr: https://steelequivalents.com/tr/malzemeler/din-en/x108crmo17.md zh: https://steelequivalents.com/zh/材料/din-en/x108crmo17.md ja: https://steelequivalents.com/ja/材料/din-en/x108crmo17.md ar: https://steelequivalents.com/ar/المواد/din-en/x108crmo17.md ko: https://steelequivalents.com/ko/재료/din-en/x108crmo17.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/x108crmo17.md hi: https://steelequivalents.com/hi/सामग्री/din-en/x108crmo17.md content_hash: sha256:6a58512660a6803177e11804e8e0076fe044020f8e301b0216b5519ddf5d272e 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/x108crmo17 > Canonical URL: https://steelequivalents.com/materials/din-en/x108crmo17 > 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 · 15 designations # X108CrMo17 X108CrMo17 is a designation in DIN / EN for the material held under material number 1.3543, also listed as X102CrMo17. It is a material in the category Bearing steels. We list 15 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, ISO, GOST and PN. - [*Material no.* **1.3543**](/materials/material-no/1.3543 "Material no.: 1.3543") - [*Category* **Bearing steels · 17 grades**](/categories/bearing-steels "Category: Bearing steels · 17 grades") - *Designations* **15** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=a0f95eee-3fef-4d20-a2d4-a83cbe9366d7&designation=3c6525cd-b23f-4a6c-97af-0551949fee93 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x108crmo17.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [ASTM A756B52 X108CrMo17 This grade’s own name](/materials/astm/a756b52-x108crmo17 "ASTM A756B52 X108CrMo17") ## About Bearing steels Bearing steels are high-carbon steels designed for rolling-element bearings and other components exposed to repeated contact loading. They are characterised by high hardness, wear resistance and resistance to rolling-contact fatigue after suitable heat treatment. They are used for bearing rings, races and rolling elements where reliable operation under cyclic loads is required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 15 designations · 7 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 - [X102CrMo17 This grade’s own name Withdrawn](/materials/din-en/x102crmo17 "DIN / EN X102CrMo17") - **X108CrMo17 This grade’s own name** UNS United States · 4 - [S44002 Indicative](/materials/uns/s44002 "UNS S44002") - [S44003 Indicative](/materials/uns/s44003 "UNS S44003") - [S44004 Indicative](/materials/uns/s44004 "UNS S44004") - [S44020 Indicative](/materials/uns/s44020 "UNS S44020") AISI / SAE United States · 4 - [440A Indicative](/materials/aisi-sae/440a "AISI / SAE 440A") - [440B Indicative](/materials/aisi-sae/440b "AISI / SAE 440B") - [440C Indicative](/materials/aisi-sae/440c "AISI / SAE 440C") - [440F Indicative](/materials/aisi-sae/440f "AISI / SAE 440F") ASTM United States · 1 - [A756B52 X108CrMo17 This grade’s own name](/materials/astm/a756b52-x108crmo17 "ASTM A756B52 X108CrMo17") ISO International · 1 - **X108CrMo17 Indicative** GOST Russia / CIS · 2 - [95Ch18 Indicative](/materials/gost/95ch18 "GOST 95Ch18") - [95Kh18 Indicative](/materials/gost/95kh18 "GOST 95Kh18") PN Poland · 1 - [H18 Indicative](/materials/pn/h18 "PN H18") 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 C Si Iron — the balance, never listed by a standard — 79.3 % Cr — 17 % C — 1.1 % Si — 1 % Traces & impurities · 1.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.95–1.2 — Unusual | | Si | ≤ 1 | | Mn | ≤ 1 | | P | 0.04 | | S | 0.015 | | Cr | 16–18 | | Mo | 0.4–0.8 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 | 0,95-1,20 | 0.950 | 1.200 | Range | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | 16,0-18,0 | 16.000 | 18.000 | Range | | Mn | ≤1,00 | — | 1.000 | Max | | Mo | 0,40-0,80 | 0.400 | 0.800 | 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 7,85 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.3, a shared category, and a published range for Cr / Mo 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. [S44004 1.3544 Cr 16,0-18,0 · Mo 0,35-0,75 - ΔCr 0.00 - ΔMo 0.05 - 20 designations](/materials/uns/s44004 "S44004") ## 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=a0f95eee-3fef-4d20-a2d4-a83cbe9366d7&designation=3c6525cd-b23f-4a6c-97af-0551949fee93 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x108crmo17.pdf "Datasheet as PDF")