--- title: "1.3544 — Bearing steels" description: "1.3544 is the material number of the grade also listed as S44004. It is a material in the category Bearing steels. Designations recorded for this grade: 20." canonical: https://steelequivalents.com/materials/material-no/1.3544 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.3544.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.3544.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.3544.md es: https://steelequivalents.com/es/materiales/número-de-material/1.3544.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.3544.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.3544.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.3544.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.3544.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.3544.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.3544.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.3544.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.3544.md zh: https://steelequivalents.com/zh/材料/材料编号/1.3544.md ja: https://steelequivalents.com/ja/材料/材料番号/1.3544.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.3544.md ko: https://steelequivalents.com/ko/재료/재료번호/1.3544.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.3544.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.3544.md content_hash: sha256:df59e49a44ce375a5df2d9a2452c3163e44d4eb9d7e27be970add0bb6c074d4f 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/1.3544 > Canonical URL: https://steelequivalents.com/materials/material-no/1.3544 > 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 · 20 designations # 1.3544 1.3544 is the material number of the grade also listed as S44004. It is a material in the category Bearing steels. We list 20 designations recorded for this grade, in the standards UNS, AISI / SAE, ASTM, SAE AMS, JIS and GB. - ***Material no.* **1.3544**** - [*Category* **Bearing steels · 17 grades**](/categories/bearing-steels "Category: Bearing steels · 17 grades") - *Designations* **20** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=d95483be-2673-4352-b334-d3441013181c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3544.pdf "Datasheet as PDF") ## 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 20 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. UNS United States · 1 - [S44004 Indicative](/materials/uns/s44004 "UNS S44004") AISI / SAE United States · 2 - [440C Indicative](/materials/aisi-sae/440c "AISI / SAE 440C") - [51440C Indicative](/materials/aisi-sae/51440c "AISI / SAE 51440C") ASTM United States · 10 - [A 480 Indicative](/materials/astm/a480 "ASTM A 480") - [A276 Indicative](/materials/astm/a276 "ASTM A276") - [A314 Indicative](/materials/astm/a314 "ASTM A314") - [A473 Indicative](/materials/astm/a473 "ASTM A473") - [A493 Indicative](/materials/astm/a493 "ASTM A493") - [A580 Indicative](/materials/astm/a580 "ASTM A580") - [F116 Indicative](/materials/astm/f116 "ASTM F116") - [F1613 Indicative](/materials/astm/f1613 "ASTM F1613") - [F2215 Indicative](/materials/astm/f2215 "ASTM F2215") - [F899 Indicative](/materials/astm/f899 "ASTM F899") SAE AMS United States / Aerospace · 5 - [5618 Indicative](/materials/ams/5618 "SAE AMS 5618") - [5630 Indicative](/materials/ams/5630 "SAE AMS 5630") - [5880 Indicative](/materials/ams/5880 "SAE AMS 5880") - [5899 Indicative](/materials/ams/5899 "SAE AMS 5899") - [7445 Indicative](/materials/ams/7445 "SAE AMS 7445") JIS Japan · 1 - [SUS 440C Indicative](/materials/jis/sus440c "JIS SUS 440C") GB China · 1 - [9Cr18 Indicative](/materials/gb/9cr18 "GB 9Cr18") 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 C Si Iron — the balance, never listed by a standard — 78.9 % Cr — 17 % C — 1 % Si — 1 % Traces & impurities · 2.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.95–1.1 | | Si | ≤ 1 | | Mn | ≤ 1 | | P | 0.025 | | S | 0.015 | | Cr | 16–18 | | Mo | 0.35–0.75 | | Ni | 0.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel 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 | 0,95-1,10 | 0.950 | 1.100 | Range | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,025 | 0.025 | 0.025 | 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 | | Ni | 0,5 | 0.500 | 0.500 | Exact | | Mo | 0,35-0,75 | 0.350 | 0.750 | 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. ## 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. [X108CrMo17 1.3543 Cr 16,0-18,0 · Mo 0,40-0,80 - ΔCr 0.00 - ΔMo 0.05 - 15 designations](/materials/din-en/x108crmo17 "X108CrMo17") ## 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=d95483be-2673-4352-b334-d3441013181c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3544.pdf "Datasheet as PDF")