--- title: "FMR86 — Spring steels" description: "FMR86 in AFNOR: material number 1.1269, also listed as C85S. It is a material in the category Spring steels. Designations recorded for this grade: 33." canonical: https://steelequivalents.com/materials/afnor/fmr86 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/afnor/fmr86.md cs: https://steelequivalents.com/cs/materiály/afnor/fmr86.md de: https://steelequivalents.com/de/werkstoffe/afnor/fmr86.md es: https://steelequivalents.com/es/materiales/afnor/fmr86.md fr: https://steelequivalents.com/fr/matériaux/afnor/fmr86.md hu: https://steelequivalents.com/hu/anyagok/afnor/fmr86.md it: https://steelequivalents.com/it/materiali/afnor/fmr86.md nl: https://steelequivalents.com/nl/materialen/afnor/fmr86.md pl: https://steelequivalents.com/pl/materiały/afnor/fmr86.md pt: https://steelequivalents.com/pt/materiais/afnor/fmr86.md ru: https://steelequivalents.com/ru/материалы/afnor/fmr86.md tr: https://steelequivalents.com/tr/malzemeler/afnor/fmr86.md zh: https://steelequivalents.com/zh/材料/afnor/fmr86.md ja: https://steelequivalents.com/ja/材料/afnor/fmr86.md ar: https://steelequivalents.com/ar/المواد/afnor/fmr86.md ko: https://steelequivalents.com/ko/재료/afnor/fmr86.md pt-br: https://steelequivalents.com/pt-br/materiais/afnor/fmr86.md hi: https://steelequivalents.com/hi/सामग्री/afnor/fmr86.md content_hash: sha256:1f21cf5120eb41ec8a2ad70010908a9d0e8e3f5fdd7a2cdbb3e27c3299c26198 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/afnor/fmr86 > Canonical URL: https://steelequivalents.com/materials/afnor/fmr86 > 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. AFNOR · France · 33 designations # FMR86 FMR86 is a designation in AFNOR for the material held under material number 1.1269, also listed as C85S. It is a material in the category Spring steels. We list 33 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, ISO, JIS, GB, GOST, UNI, ČSN, STN, PN, STAS and BDS. - [*Material no.* **1.1269**](/materials/material-no/1.1269 "Material no.: 1.1269") - [*Category* **Spring steels · 52 grades**](/categories/spring-steels "Category: Spring steels · 52 grades") - *Designations* **33** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=9dca5559-72f0-4620-8eb0-af5fa50f8276&designation=6930ec8e-ae75-48e2-bd82-7df98204a767 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/afnor/fmr86.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C85S This grade’s own name](/materials/din-en/c85s "DIN / EN C85S") - [UNS G10860 This grade’s own name · 3 grades on that route](/materials/uns/g10860 "UNS G10860") - [AISI / SAE 1086 This grade’s own name · 4 grades on that route](/materials/aisi-sae/1086 "AISI / SAE 1086") ## 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 33 designations · 15 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 · 2 - [C85S This grade’s own name](/materials/din-en/c85s "DIN / EN C85S") - [Ck 85 This grade’s own name Withdrawn](/materials/din-en/ck-85 "DIN / EN Ck 85") UNS United States · 1 - [G10860 This grade’s own name](/materials/uns/g10860 "UNS G10860") AISI / SAE United States · 8 - [1080 Indicative](/materials/aisi-sae/1080 "AISI / SAE 1080") - [1084 Indicative](/materials/aisi-sae/1084 "AISI / SAE 1084") - [1085 Indicative](/materials/aisi-sae/1085 "AISI / SAE 1085") - [1086 This grade’s own name](/materials/aisi-sae/1086 "AISI / SAE 1086") - [A68 Indicative](/materials/aisi-sae/a68 "AISI / SAE A68") - [G10840 Indicative](/materials/uns/g10840 "AISI / SAE G10840") - [G10850 Indicative](/materials/uns/g10850 "AISI / SAE G10850") - [G10860 Indicative](/materials/uns/g10860 "AISI / SAE G10860") BS United Kingdom · 3 - [80CS Indicative](/materials/bs/80cs "BS 80CS") - [80HS Indicative](/materials/bs/80hs "BS 80HS") - [CS80 Indicative](/materials/bs/cs80 "BS CS80") AFNOR France · 4 - [C90RR Indicative](/materials/afnor/c90rr "AFNOR C90RR") - **FMR86 Indicative** - [XC85 Indicative](/materials/afnor/xc85 "AFNOR XC85") - [XC90 Indicative](/materials/afnor/xc90 "AFNOR XC90") ISO International · 1 - [CS85 Indicative](/materials/iso/cs85 "ISO CS85") JIS Japan · 2 - [SK5-CSP Indicative](/materials/jis/sk5-csp "JIS SK5-CSP") - [SUP3 Indicative](/materials/jis/sup3 "JIS SUP3") GB China · 1 - [85 Indicative](/materials/pn/85 "GB 85") GOST Russia / CIS · 1 - [85 Indicative](/materials/pn/85 "GOST 85") UNI Italy · 3 - [3CD85 Indicative](/materials/uni/3cd85 "UNI 3CD85") - [C85 Indicative](/materials/din-en/c85 "UNI C85") - [C90 Indicative](/materials/uni/c90 "UNI C90") ČSN Czechia · 1 - [12090 Indicative](/materials/csn/12090 "ČSN 12090") STN Slovakia · 1 - [12090 Indicative](/materials/csn/12090 "STN 12090") PN Poland · 3 - [85 Indicative](/materials/pn/85 "PN 85") - [D85 Indicative](/materials/pn/d85 "PN D85") - [gat. 85 Indicative](/materials/pn/gat-85 "PN gat. 85") STAS Romania · 1 - [OLC85A Indicative](/materials/stas/olc85a "STAS OLC85A") BDS Bulgaria · 1 - [85 Indicative](/materials/pn/85 "BDS 85") 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 C Mn Cr Iron — the balance, never listed by a standard — 97.4 % C — 0.9 % Mn — 0.6 % Cr — 0.4 % Traces & impurities · 0.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.8–0.9 | | Si | 0.15–0.35 | | Mn | 0.4–0.7 | | P | 0.025 | | S | 0.025 | | Cr | ≤ 0.4 | | Mo | ≤ 0.1 | | Ni | ≤ 0.4 | 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 | 0,80-0,90 | 0.800 | 0.900 | Range | | Si | 0,15-0,35 | 0.150 | 0.350 | Range | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Cr | ≤0,40 | — | 0.400 | Max | | Mn | 0,40-0,70 | 0.400 | 0.700 | Range | | Ni | ≤0,40 | — | 0.400 | Max | | Mo | ≤0,10 | — | 0.100 | 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 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 6 conditions · 7 values By thickness**Soft annealed** source `steelnumber` | Thickness mm | Rm N/mm² | A80% | |---|---|---| | 0.3 – 3 | 670 | 15 | By thickness**Cold rolled** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | 0.3 – 3 | 1190 | By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | 0.3 – 3 | 1200 – 2000 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HV | |---|---| | Soft annealed | 210 | By delivery state**Cold rolled** source `steelnumber` | Delivery state | HV | |---|---| | Cold rolled | 325 | By delivery state**Quenched and tempered** source `steelnumber` | Delivery state | HV | |---|---| | Quenched and tempered | 370 – 600 | 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 1.1, 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. [C78D2 1.1252 Mn 0,50-0,70 · Si 0,10-0,30 - ΔMn 0.05 - ΔSi 0.05 - 5 designations](/materials/din-en/c78d2 "C78D2")[C76D2 1.1253 Mn 0,50-0,70 · Si 0,10-0,30 - ΔMn 0.05 - ΔSi 0.05 - 5 designations](/materials/din-en/c76d2 "C76D2")[C86D2 1.1265 Mn 0,50-0,70 · Si 0,10-0,30 - ΔMn 0.05 - ΔSi 0.05 - 6 designations](/materials/din-en/c86d2 "C86D2")[1.1274 1.1274 Mn 0,30-0,60 · Si 0,15-0,35 - ΔMn 0.10 - ΔSi 0.00 - 26 designations](/materials/material-no/1.1274 "1.1274")[C60S 1.1211 Mn 0,60-0,90 · Si 0,15-0,35 - ΔMn 0.20 - ΔSi 0.00 - 8 designations](/materials/din-en/c60s "C60S")[C67S 1.1231 Mn 0,60-0,90 · Si 0,15-0,35 - ΔMn 0.20 - ΔSi 0.00 - 42 designations](/materials/din-en/c67s "C67S") ## 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=9dca5559-72f0-4620-8eb0-af5fa50f8276&designation=6930ec8e-ae75-48e2-bd82-7df98204a767 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/afnor/fmr86.pdf "Datasheet as PDF")