--- title: "60Si8 — Spring steels" description: "60Si8 in AFNOR: material number 1.5026, also listed as 55Si7. It is a material in the category Spring steels. Designations recorded for this grade: 43." canonical: https://steelequivalents.com/materials/afnor/60si8 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/afnor/60si8.md cs: https://steelequivalents.com/cs/materiály/afnor/60si8.md de: https://steelequivalents.com/de/werkstoffe/afnor/60si8.md es: https://steelequivalents.com/es/materiales/afnor/60si8.md fr: https://steelequivalents.com/fr/matériaux/afnor/60si8.md hu: https://steelequivalents.com/hu/anyagok/afnor/60si8.md it: https://steelequivalents.com/it/materiali/afnor/60si8.md nl: https://steelequivalents.com/nl/materialen/afnor/60si8.md pl: https://steelequivalents.com/pl/materiały/afnor/60si8.md pt: https://steelequivalents.com/pt/materiais/afnor/60si8.md ru: https://steelequivalents.com/ru/материалы/afnor/60si8.md tr: https://steelequivalents.com/tr/malzemeler/afnor/60si8.md zh: https://steelequivalents.com/zh/材料/afnor/60si8.md ja: https://steelequivalents.com/ja/材料/afnor/60si8.md ar: https://steelequivalents.com/ar/المواد/afnor/60si8.md ko: https://steelequivalents.com/ko/재료/afnor/60si8.md pt-br: https://steelequivalents.com/pt-br/materiais/afnor/60si8.md hi: https://steelequivalents.com/hi/सामग्री/afnor/60si8.md content_hash: sha256:6835294f1abec26641c882b723115603189afaad31ece706ab7f62383502f81e 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/60si8 > Canonical URL: https://steelequivalents.com/materials/afnor/60si8 > 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 · 43 designations # 60Si8 60Si8 is a designation in AFNOR for the material held under material number 1.5026, also listed as 55Si7. It is a material in the category Spring steels. We list 43 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, Standard not established, BS, AFNOR, UNE, JIS, GB, GOST, UNI, SS, ČSN, PN, COPANT, SRPS, MSZ, STAS, AS / NZS, BDS and NBN. - [*Material no.* **1.5026**](/materials/material-no/1.5026 "Material no.: 1.5026") - [*Category* **Spring steels · 52 grades**](/categories/spring-steels "Category: Spring steels · 52 grades") - *Designations* **43** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=57db0286-ef2e-4718-ad7f-bacf16806b32&designation=0b2d16d7-6873-43bb-a7e9-19191447f4d0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/afnor/60si8.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 56Si7 This grade’s own name](/materials/din-en/56si7 "DIN / EN 56Si7") - [UNS G92550 This grade’s own name · 2 grades on that route](/materials/uns/g92550 "UNS G92550") - [AISI / SAE 9255 This grade’s own name · 2 grades on that route](/materials/aisi-sae/9255 "AISI / SAE 9255") - [BS 250A58 This grade’s own name · 3 grades on that route](/materials/bs/250a58 "BS 250A58") - [SS SIS 14 2090 This grade’s own name](/materials/ss/sis-14-2090 "SS SIS 14 2090") ## 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 43 designations · 21 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 - [55Si7 This grade’s own name Withdrawn](/materials/din-en/55si7 "DIN / EN 55Si7") - [56Si7 This grade’s own name](/materials/din-en/56si7 "DIN / EN 56Si7") UNS United States · 2 - [G92540 Indicative](/materials/uns/g92540 "UNS G92540") - [G92550 This grade’s own name](/materials/uns/g92550 "UNS G92550") AISI / SAE United States · 2 - [9255 This grade’s own name](/materials/aisi-sae/9255 "AISI / SAE 9255") - [G92550 Indicative](/materials/uns/g92550 "AISI / SAE G92550") Standard not established United Kingdom / France · 1 - 56Si7 This grade’s own name BS United Kingdom · 6 - [250A53 Indicative](/materials/bs/250a53 "BS 250A53") - [250A58 This grade’s own name](/materials/bs/250a58 "BS 250A58") - [250A61 This grade’s own name](/materials/bs/250a61 "BS 250A61") - [251A58 Indicative](/materials/bs/251a58 "BS 251A58") - [EN 45A This grade’s own name](/materials/bs/en-45a "BS EN 45A") - [EN45 This grade’s own name](/materials/bs/en45 "BS EN45") AFNOR France · 4 - [55S7 Indicative](/materials/afnor/55s7 "AFNOR 55S7") - [55Si7RR Indicative](/materials/afnor/55si7rr "AFNOR 55Si7RR") - [56SC7 Indicative](/materials/afnor/56sc7 "AFNOR 56SC7") - **60Si8 Indicative** UNE Spain · 3 - [55Si7 Indicative](/materials/din-en/55si7 "UNE 55Si7") - [56Si7 Indicative](/materials/din-en/56si7 "UNE 56Si7") - [F.1440 Indicative](/materials/une/f-1440 "UNE F.1440") JIS Japan · 1 - [SUP7 Indicative](/materials/jis/sup7 "JIS SUP7") GB China · 1 - [55Si2Mn Indicative](/materials/gb/55si2mn "GB 55Si2Mn") GOST Russia / CIS · 3 - [40С2 Indicative](/materials/gost/40s2 "GOST 40С2") - [55S2 Indicative](/materials/gost/55s2 "GOST 55S2") - [55С2 Indicative](/materials/gost/55s2 "GOST 55С2") UNI Italy · 2 - [55Si7 Indicative](/materials/din-en/55si7 "UNI 55Si7") - [55Si8 Indicative](/materials/uni/55si8 "UNI 55Si8") SS Sweden · 3 - [2085 Indicative](/materials/ss/2085 "SS 2085") - [2090 Indicative](/materials/ss/2090 "SS 2090") - [SIS 14 2090 This grade’s own name](/materials/ss/sis-14-2090 "SS SIS 14 2090") ČSN Czechia · 2 - [13261 Indicative](/materials/csn/13261 "ČSN 13261") - [13261 PH Indicative](/materials/csn/13261-ph "ČSN 13261 PH") PN Poland · 3 - [40S2 Indicative](/materials/gost/40s2 "PN 40S2") - [50S2 Indicative](/materials/gost/50s2 "PN 50S2") - [55S2 Indicative](/materials/gost/55s2 "PN 55S2") COPANT Latin America · 1 - [9254 Indicative](/materials/aisi-sae/9254 "COPANT 9254") SRPS Serbia · 1 - [Č.2133 Indicative](/materials/srps/c-2133 "SRPS Č.2133") MSZ Hungary · 1 - [55Si7 Indicative](/materials/din-en/55si7 "MSZ 55Si7") STAS Romania · 1 - [56Si17A Indicative](/materials/stas/56si17a "STAS 56Si17A") AS / NZS Australia / New Zealand · 2 - [9255 Indicative](/materials/aisi-sae/9255 "AS / NZS 9255") - [XK9258S Indicative](/materials/as-nzs/xk9258s "AS / NZS XK9258S") BDS Bulgaria · 1 - [55S2 Indicative](/materials/gost/55s2 "BDS 55S2") NBN Belgium · 1 - [55Si7 Indicative](/materials/din-en/55si7 "NBN 55Si7") 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 Si Mn C Iron — the balance, never listed by a standard — 95.9 % Si — 1.8 % Mn — 0.8 % C — 0.6 % Traces & impurities · 1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.52–0.6 | | Si | 1.6–2 — Unusual | | Mn | 0.6–0.9 | | 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 | 0,52-0,60 | 0.520 | 0.600 | Range | | Si | 1,60-2,00 | 1.600 | 2.000 | Range | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Cr | ≤0,40 | — | 0.400 | Max | | Mn | 0,60-0,90 | 0.600 | 0.900 | Range | | Ni | 0,4 | 0.400 | 0.400 | Exact | | Mo | ≤0,10 | — | 0.100 | Max | - Cu+10Sn ≤0,60 - Cu+10Sn ≤0,60 - Cu+10Sn ≤0,60 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 computed from composition · °C Predicted Ae3 815 °C Predicted Ae1 758 °C Predicted Acm 713 °C Predicted Bs 547 °C These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either. ## Physical & mechanical properties Density 7,44 g/cm³ Exact Transformation point Ac1 755 °C Exact Transformation point Ac3 810 °C Exact · Ac3(Acm) Transformation point Ar3 770 °C Exact · Ar3(Arcm) Transformation point Ar1 690 °C Exact Weldability not suitable for welding As published: is not used. Flake sensitivity not susceptible As published: not 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 10 conditions · 20 values By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (without heat treatment) , GOST 14959 | 285 | | (heat treatment) , Rolled stock GOST 14959-79 | 241 | By thickness**Soft annealed** source `steelnumber` | Thickness mm | Rm N/mm² | A80% | |---|---|---| | 0.3 – 3 | 740 | 12 | By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | 0.3 – 3 | 1200 – 1700 | By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Annealing 750 - 780°C,Cooling oven | 760 | 440 | 21 | 42 | 160 | 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 | 1270 | 1175 | 6 | 30 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | HV | |---|---|---| | Soft annealed | 248 | 230 | By delivery state**Quenched and tempered** source `steelnumber` | Delivery state | HV | |---|---| | Quenched and tempered | 370 – 520 | By delivery state**Treated to improve shearability** source `steelnumber` | Delivery state | HB | |---|---| | Treated to improve shearability | 280 | By delivery state**Annealed to achieve spheroidization of the carbides** source `steelnumber` | Delivery state | HB | |---|---| | Annealed to achieve spheroidization of the carbides | 230 | At temperature**no delivery state stated** source `splav` | Temperature °C | Elastic modulus GPa | |---|---| | 20 | 196 | 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 - Quenching and Tempering Wire and As-rolled 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/azhlNWIxODUyMw__ "Source: www.caishuku.com") ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.5, a shared category, and a published range for Si / 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. [71Si7 1.5029 Si 1,50-1,80 · Mn 0,60-0,80 - ΔSi 0.15 - ΔMn 0.05 - 1 designations](/materials/din-en/71si7 "71Si7")[38Si7 1.5023 Si 1,50-1,80 · Mn 0,50-0,80 - ΔSi 0.15 - ΔMn 0.10 - 7 designations](/materials/din-en/38si7 "38Si7")[46Si7 1.5024 Si 1,50-1,80 · Mn 0,50-0,80 - ΔSi 0.15 - ΔMn 0.10 - 11 designations](/materials/din-en/46si7 "46Si7")[51Si7 1.5025 Si 1,50-1,80 · Mn 0,50-0,80 - ΔSi 0.15 - ΔMn 0.10 - 9 designations](/materials/din-en/51si7 "51Si7")[60Si7 1.5027 Si 1,50-1,80 · Mn 0,70-1,00 - ΔSi 0.15 - ΔMn 0.10 - 18 designations](/materials/din-en/60si7 "60Si7")[65Si7 1.5028 Si 1,50-1,80 · Mn 0,70-1,00 - ΔSi 0.15 - ΔMn 0.10 - 17 designations](/materials/din-en/65si7 "65Si7") ## 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=57db0286-ef2e-4718-ad7f-bacf16806b32&designation=0b2d16d7-6873-43bb-a7e9-19191447f4d0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/afnor/60si8.pdf "Datasheet as PDF")