--- title: "F 1207 — Quenched and tempered steels" description: "F 1207 in UNE: material number 1.7039, also listed as 41CrS4. Category: Quenched and tempered steels. Designations recorded for this grade: 20." canonical: https://steelequivalents.com/materials/une/f-1207 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/une/f-1207.md cs: https://steelequivalents.com/cs/materiály/une/f-1207.md de: https://steelequivalents.com/de/werkstoffe/une/f-1207.md es: https://steelequivalents.com/es/materiales/une/f-1207.md fr: https://steelequivalents.com/fr/matériaux/une/f-1207.md hu: https://steelequivalents.com/hu/anyagok/une/f-1207.md it: https://steelequivalents.com/it/materiali/une/f-1207.md nl: https://steelequivalents.com/nl/materialen/une/f-1207.md pl: https://steelequivalents.com/pl/materiały/une/f-1207.md pt: https://steelequivalents.com/pt/materiais/une/f-1207.md ru: https://steelequivalents.com/ru/материалы/une/f-1207.md tr: https://steelequivalents.com/tr/malzemeler/une/f-1207.md zh: https://steelequivalents.com/zh/材料/une/f-1207.md ja: https://steelequivalents.com/ja/材料/une/f-1207.md ar: https://steelequivalents.com/ar/المواد/une/f-1207.md ko: https://steelequivalents.com/ko/재료/une/f-1207.md pt-br: https://steelequivalents.com/pt-br/materiais/une/f-1207.md hi: https://steelequivalents.com/hi/सामग्री/une/f-1207.md content_hash: sha256:d9857bf4095048c5d8b1e018b5926bcfbd115bdc180ebf81dc76402776efe7ad 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/une/f-1207 > Canonical URL: https://steelequivalents.com/materials/une/f-1207 > 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 · 20 designations # F 1207 F 1207 is a designation in UNE for the material held under material number 1.7039, also listed as 41CrS4. It is a material in the category Quenched and tempered steels. We list 20 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GOST, UNI, SS, ČSN, SRPS and MSZ. - [*Material no.* **1.7039**](/materials/material-no/1.7039 "Material no.: 1.7039") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **20** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=6df1251a-521b-4ac6-a3dd-de7c74ce55c5&designation=e880268c-40f9-4c0c-94a5-7ef680cb7af9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/une/f-1207.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 41CrS4 This grade’s own name](/materials/din-en/41crs4 "DIN / EN 41CrS4") - [UNS H51400 This grade’s own name · 2 grades on that route](/materials/uns/h51400 "UNS H51400") - [AISI / SAE 5140H This grade’s own name · 3 grades on that route](/materials/aisi-sae/5140h "AISI / SAE 5140H") - [BS 530H40 This grade’s own name · 2 grades on that route](/materials/bs/530h40 "BS 530H40") - [JIS SCR 440H This grade’s own name](/materials/ks/scr440h "JIS SCR 440H") ## 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 20 designations · 14 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 - [41CrS4 This grade’s own name](/materials/din-en/41crs4 "DIN / EN 41CrS4") UNS United States · 2 - [G51400 Indicative](/materials/uns/g51400 "UNS G51400") - [H51400 This grade’s own name](/materials/uns/h51400 "UNS H51400") AISI / SAE United States · 2 - [5140 Indicative](/materials/aisi-sae/5140 "AISI / SAE 5140") - [5140H This grade’s own name](/materials/aisi-sae/5140h "AISI / SAE 5140H") BS United Kingdom · 2 - [530H40 This grade’s own name](/materials/bs/530h40 "BS 530H40") - [EN18 This grade’s own name](/materials/bs/en18 "BS EN18") AFNOR France · 1 - [42C4u Indicative](/materials/afnor/42c4u "AFNOR 42C4u") UNE Spain · 2 - [42Cr41 Indicative](/materials/une/42cr41 "UNE 42Cr41") - **F 1207 This grade’s own name** ISO International · 1 - [41CrS4 Indicative](/materials/din-en/41crs4 "ISO 41CrS4") JIS Japan · 1 - [SCR 440H This grade’s own name](/materials/ks/scr440h "JIS SCR 440H") GOST Russia / CIS · 2 - [40CH This grade’s own name](/materials/gost/40ch "GOST 40CH") - [40KH Indicative](/materials/gost/40kh "GOST 40KH") UNI Italy · 1 - [41Cr4 Indicative](/materials/din-en/41cr4 "UNI 41Cr4") SS Sweden · 2 - [2245 Indicative](/materials/ss/2245 "SS 2245") - [SIS 2245 This grade’s own name](/materials/ss/sis-2245 "SS SIS 2245") ČSN Czechia · 1 - [14146ŽH Indicative](/materials/csn/14146zh "ČSN 14146ŽH") SRPS Serbia · 1 - [Č.4181 Indicative](/materials/srps/c-4181 "SRPS Č.4181") MSZ Hungary · 1 - [Cr 3 E Indicative](/materials/msz/cr-3-e "MSZ Cr 3 E") 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 Cr Mn C Iron — the balance, never listed by a standard — 97.3 % Cr — 1.1 % Mn — 0.8 % C — 0.4 % Traces & impurities · 0.5 % 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 | 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 | 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 | 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 7,72 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 · 5 values By thickness**Quenched and tempered · round products** source `steelnumber` | Thickness mm | A% · Lo = 5,65 √So | |---|---| | ≤ 16 | 11 | | 16 – 40 | 12 | | 40 – 100 | 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/azhlNWIxMTk5Nzk_ "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=6df1251a-521b-4ac6-a3dd-de7c74ce55c5&designation=e880268c-40f9-4c0c-94a5-7ef680cb7af9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/une/f-1207.pdf "Datasheet as PDF")