--- title: "40CrMo41 — Quenched and tempered steels" description: "40CrMo41 in UNE: material number 1.7227, also listed as 42CrMoS4. Category: Quenched and tempered steels. Designations recorded for this grade: 28." canonical: https://steelequivalents.com/materials/une/40crmo41 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/une/40crmo41.md cs: https://steelequivalents.com/cs/materiály/une/40crmo41.md de: https://steelequivalents.com/de/werkstoffe/une/40crmo41.md es: https://steelequivalents.com/es/materiales/une/40crmo41.md fr: https://steelequivalents.com/fr/matériaux/une/40crmo41.md hu: https://steelequivalents.com/hu/anyagok/une/40crmo41.md it: https://steelequivalents.com/it/materiali/une/40crmo41.md nl: https://steelequivalents.com/nl/materialen/une/40crmo41.md pl: https://steelequivalents.com/pl/materiały/une/40crmo41.md pt: https://steelequivalents.com/pt/materiais/une/40crmo41.md ru: https://steelequivalents.com/ru/материалы/une/40crmo41.md tr: https://steelequivalents.com/tr/malzemeler/une/40crmo41.md zh: https://steelequivalents.com/zh/材料/une/40crmo41.md ja: https://steelequivalents.com/ja/材料/une/40crmo41.md ar: https://steelequivalents.com/ar/المواد/une/40crmo41.md ko: https://steelequivalents.com/ko/재료/une/40crmo41.md pt-br: https://steelequivalents.com/pt-br/materiais/une/40crmo41.md hi: https://steelequivalents.com/hi/सामग्री/une/40crmo41.md content_hash: sha256:8165ee27ef97319a3222a368676adbdc36d709189171473eaa3ab71bdc865241 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/une/40crmo41 > Canonical URL: https://steelequivalents.com/materials/une/40crmo41 > 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. UNE · Spain · 28 designations # 40CrMo41 40CrMo41 is a designation in UNE for the material held under material number 1.7227, also listed as 42CrMoS4. It is a material in the category Quenched and tempered steels. We list 28 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, SAE AMS, JIS, GOST, UNI, PN, SRPS, MSZ and STAS. - [*Material no.* **1.7227**](/materials/material-no/1.7227 "Material no.: 1.7227") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **28** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=96f4a9cb-35ff-4781-a529-b6d0d1353160&designation=72609038-21f7-427d-aad1-c0ee5d07dfee "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/une/40crmo41.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 42CrMoS4 This grade’s own name](/materials/din-en/42crmos4 "DIN / EN 42CrMoS4") - [UNS G41400 This grade’s own name · 2 grades on that route](/materials/uns/g41400 "UNS G41400") - [AISI / SAE 4140 This grade’s own name · 4 grades on that route](/materials/aisi-sae/4140 "AISI / SAE 4140") ## About Quenched and tempered steels Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 28 designations · 16 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 - [42CrMoS4 This grade’s own name](/materials/din-en/42crmos4 "DIN / EN 42CrMoS4") UNS United States · 2 - [G41400 This grade’s own name](/materials/uns/g41400 "UNS G41400") - [G4145 Indicative](/materials/uns/g4145 "UNS G4145") AISI / SAE United States · 2 - [4140 This grade’s own name](/materials/aisi-sae/4140 "AISI / SAE 4140") - [4145 Indicative](/materials/aisi-sae/4145 "AISI / SAE 4145") ASTM United States · 1 - [A829 Indicative](/materials/astm/a829 "ASTM A829") BS United Kingdom · 2 - [708M40 Indicative](/materials/bs/708m40 "BS 708M40") - [709M40 Indicative](/materials/bs/709m40 "BS 709M40") AFNOR France · 4 - [40CD4 Indicative](/materials/afnor/40cd4 "AFNOR 40CD4") - [42CD4 Indicative](/materials/afnor/42cd4 "AFNOR 42CD4") - [42CD4S Indicative](/materials/afnor/42cd4s "AFNOR 42CD4S") - [42CD4u Indicative](/materials/afnor/42cd4u "AFNOR 42CD4u") UNE Spain · 1 - **40CrMo41 Indicative** ISO International · 1 - [42CrMoS4 Indicative](/materials/din-en/42crmos4 "ISO 42CrMoS4") SAE AMS United States / Aerospace · 4 - [6349 Indicative](/materials/ams/6349 "SAE AMS 6349") - [6381 Indicative](/materials/ams/6381 "SAE AMS 6381") - [6382 Indicative](/materials/ams/6382 "SAE AMS 6382") - [6395 Indicative](/materials/ams/6395 "SAE AMS 6395") JIS Japan · 1 - [SCM4 Indicative](/materials/jis/scm4 "JIS SCM4") GOST Russia / CIS · 4 - [38ChM Indicative](/materials/bds/38chm "GOST 38ChM") - [38ChMA Indicative](/materials/gost/38chma "GOST 38ChMA") - [38ХМ Indicative](/materials/gost/38khm "GOST 38ХМ") - [38ХМА Indicative](/materials/gost/38khma "GOST 38ХМА") UNI Italy · 1 - [42CrMo4 Indicative](/materials/din-en/42crmo4 "UNI 42CrMo4") PN Poland · 1 - [40HM Indicative](/materials/pn/40hm "PN 40HM") SRPS Serbia · 1 - [Č.4782 Indicative](/materials/srps/c-4782 "SRPS Č.4782") MSZ Hungary · 1 - [CMo4 E Indicative](/materials/msz/cmo4-e "MSZ CMo4 E") STAS Romania · 1 - [41MoCr11 Indicative](/materials/stas/41mocr11 "STAS 41MoCr11") 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 Mn C Iron — the balance, never listed by a standard — 97.1 % Cr — 1.1 % Mn — 0.8 % C — 0.4 % Traces & impurities · 0.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.38–0.45 | | Si | ≤ 0.4 | | Mn | 0.6–0.9 | | P | 0.025 | | S | 0.02–0.04 | | Cr | 0.9–1.2 | | Mo | 0.15–0.3 | 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 | 0,38-0,45 | 0.380 | 0.450 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,020-0,040 | 0.020 | 0.040 | Range | | Cr | 0,90-1,20 | 0.900 | 1.200 | Range | | Mn | 0,60-0,90 | 0.600 | 0.900 | Range | | Mo | 0,15-0,30 | 0.150 | 0.300 | 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 7,72 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 3 conditions · 7 values By thickness**Quenched and tempered · round products** source `steelnumber` | Thickness mm | A% · Lo = 5,65 √So | |---|---| | ≤ 16 | 10 | | 16 – 40 | 11 | | 40 – 100 | 12 | | 100 – 160 | 13 | | 160 – 250 | 14 | By delivery state**Treated to improve shearability** source `steelnumber` | Delivery state | HB | |---|---| | Treated to improve shearability | 255 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 241 | 5 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition. 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. ## Heat treatment Supply condition - Soft annealing Steel product - Quenching and Tempering Steel product d ≤ 16mm t ≤ 8mm Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied. Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxMTk5ODg_ "Source: www.caishuku.com") ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.7, a shared category, and a published range for Cr / Mn 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. [28Cr4 1.7030 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 28 designations](/materials/din-en/28cr4 "28Cr4")[1.7033 1.7033 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 56 designations](/materials/material-no/1.7033 "1.7033")[37Cr4 1.7034 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 104 designations](/materials/din-en/37cr4 "37Cr4")[1.7035 1.7035 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 67 designations](/materials/material-no/1.7035 "1.7035")[34CrS4 1.7037 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 13 designations](/materials/din-en/34crs4 "34CrS4")[37CrS4 1.7038 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 10 designations](/materials/din-en/37crs4 "37CrS4") ## 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=96f4a9cb-35ff-4781-a529-b6d0d1353160&designation=72609038-21f7-427d-aad1-c0ee5d07dfee "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/une/40crmo41.pdf "Datasheet as PDF")