--- title: "1.0614 — Spring steels" description: "1.0614 is the material number of the grade also listed as C76D. It is a material in the category Spring steels. Designations recorded for this grade: 8." canonical: https://steelequivalents.com/materials/material-no/1.0614 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0614.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0614.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0614.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0614.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0614.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0614.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0614.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0614.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0614.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0614.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0614.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0614.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0614.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0614.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0614.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0614.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0614.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0614.md content_hash: sha256:5c316999cd748e342c241ae38ae93eb7f507e6e13871c878300c415b6be272e8 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/1.0614 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0614 > 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 · 8 designations # 1.0614 1.0614 is the material number of the grade also listed as C76D. It is a material in the category Spring steels. We list 8 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, GB, GOST and BDS. - ***Material no.* **1.0614**** - [*Category* **Spring steels · 52 grades**](/categories/spring-steels "Category: Spring steels · 52 grades") - *Designations* **8** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=dbe0a4bf-d6fc-46c1-be33-25d6c4ff46dc "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0614.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C76D This grade’s own name](/materials/din-en/c76d "DIN / EN C76D") - [UNS G10740 This grade’s own name · 6 grades on that route](/materials/uns/g10740 "UNS G10740") - [AISI / SAE 1074 This grade’s own name · 7 grades on that route](/materials/aisi-sae/1074 "AISI / SAE 1074") ## About Spring steels Spring steels are alloy steels designed to store and release elastic energy repeatedly without permanent deformation. They are characterised by a combination of strength, hardness and resilience, making them suitable for springs, clips, washers and other components subjected to repeated flexing or shock. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 8 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. DIN / EN Europe · 1 - [C76D This grade’s own name](/materials/din-en/c76d "DIN / EN C76D") UNS United States · 2 - [G10740 This grade’s own name](/materials/uns/g10740 "UNS G10740") - [G10750 This grade’s own name](/materials/uns/g10750 "UNS G10750") AISI / SAE United States · 2 - [1074 This grade’s own name](/materials/aisi-sae/1074 "AISI / SAE 1074") - [1075 This grade’s own name](/materials/aisi-sae/1075 "AISI / SAE 1075") GB China · 1 - [75 Indicative](/materials/gost/75 "GB 75") GOST Russia / CIS · 1 - [75 Indicative](/materials/gost/75 "GOST 75") BDS Bulgaria · 1 - [75 Indicative](/materials/gost/75 "BDS 75") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe C Mn Cu Iron — the balance, never listed by a standard — 97.7 % C — 0.8 % Mn — 0.7 % Cu — 0.3 % Traces & impurities · 0.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.73–0.78 | | Si | 0.1–0.3 | | Mn | 0.5–0.8 | | P | 0.03 | | S | 0.03 | | Cr | ≤ 0.15 | | Mo | ≤ 0.05 | | Ni | ≤ 0.2 | | Cu | ≤ 0.25 | | Al | ≤ 0.01 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper Aluminium 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 | 0,73-0,78 | 0.730 | 0.780 | Range | | Al | ≤0,01 | — | 0.010 | Max | | Si | 0,10-0,30 | 0.100 | 0.300 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | ≤0,15 | — | 0.150 | Max | | Mn | 0,50-0,80 | 0.500 | 0.800 | Range | | Ni | ≤0,20 | — | 0.200 | Max | | Cu | ≤0,25 | — | 0.250 | Max | | Mo | ≤0,05 | — | 0.050 | Max | 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 Transformation point Ac1 720 °C Exact Transformation point Ac3 735 °C Exact · Ac3(Acm) Transformation point Ar1 700 °C Exact Weldability not suitable for welding As published: is not used. Flake sensitivity slightly susceptible As published: weakly predisposed Temper brittleness not susceptible As published: not predisposed 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 delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (without heat treatment) , Rolled stock GOST 14959-79 | 285 | | (heat treatment) , Rolled stock GOST 14959-79 | 241 | By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | Rolled stock, GOST 14959-79 | 1080 | 885 | 9 | 30 | At temperature**no delivery state stated** source `splav` | Temperature °C | Elastic modulus GPa | |---|---| | 20 | 191 | 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.0, a shared category, and a published range for Mn / Si 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. [C86D 1.0616 Mn 0,50-0,80 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 14 designations](/materials/din-en/c86d "C86D")[C75 1.0605 Mn 0,60-0,80 · Si 0,15-0,35 - ΔMn 0.05 - ΔSi 0.05 - 14 designations](/materials/din-en/c75 "C75")[C67 1.0603 Mn 0,60-0,90 · Si 0,15-0,35 - ΔMn 0.10 - ΔSi 0.05 - 15 designations](/materials/din-en/c67 "C67") ## 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=dbe0a4bf-d6fc-46c1-be33-25d6c4ff46dc "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0614.pdf "Datasheet as PDF")