--- title: "1.3503 — Bearing steels" description: "1.3503 is the material number of the grade also listed as 105Cr4. It is a material in the category Bearing steels. Designations recorded for this grade: 3." canonical: https://steelequivalents.com/materials/material-no/1.3503 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.3503.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.3503.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.3503.md es: https://steelequivalents.com/es/materiales/número-de-material/1.3503.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.3503.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.3503.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.3503.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.3503.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.3503.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.3503.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.3503.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.3503.md zh: https://steelequivalents.com/zh/材料/材料编号/1.3503.md ja: https://steelequivalents.com/ja/材料/材料番号/1.3503.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.3503.md ko: https://steelequivalents.com/ko/재료/재료번호/1.3503.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.3503.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.3503.md content_hash: sha256:e3877015bcc5e8932d5e60cbbecfd593e5062c7c3bc37f1ee816f58b7357a06c 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/1.3503 > Canonical URL: https://steelequivalents.com/materials/material-no/1.3503 > 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 · 3 designations # 1.3503 1.3503 is the material number of the grade also listed as 105Cr4. It is a material in the category Bearing steels. We list 3 designations recorded for this grade, in the standards DIN / EN, UNS and AISI / SAE. - ***Material no.* **1.3503**** - [*Category* **Bearing steels · 17 grades**](/categories/bearing-steels "Category: Bearing steels · 17 grades") - *Designations* **3** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=886f1e67-d0e5-4c87-97a8-2af66ef621dc "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3503.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS G51986 This grade’s own name · 2 grades on that route](/materials/uns/g51986 "UNS G51986") - [AISI / SAE E51100 This grade’s own name · 2 grades on that route](/materials/aisi-sae/e51100 "AISI / SAE E51100") ## 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 3 designations · 3 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 - [105Cr4 This grade’s own name Withdrawn](/materials/din-en/105cr4 "DIN / EN 105Cr4") UNS United States · 1 - [G51986 This grade’s own name](/materials/uns/g51986 "UNS G51986") AISI / SAE United States · 1 - [E51100 This grade’s own name](/materials/aisi-sae/e51100 "AISI / SAE E51100") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe C Cr Mn Iron — the balance, never listed by a standard — 97.3 % C — 1.1 % Cr — 1 % Mn — 0.3 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1–1.1 | | Si | 0.15–0.35 | | Mn | 0.25–0.4 | | P | 0.03 | | S | 0.025 | | Cr | 0.9–1.15 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 1,00-1,10 | 1.000 | 1.100 | Range | | Si | 0,15-0,35 | 0.150 | 0.350 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Cr | 0,90-1,15 | 0.900 | 1.150 | Range | | Mn | 0,25-0,40 | 0.250 | 0.400 | 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, 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. ## 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=886f1e67-d0e5-4c87-97a8-2af66ef621dc "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3503.pdf "Datasheet as PDF")