--- title: "1.7104 — Spring steels" description: "1.7104 is the material number of the grade also listed as 55SiCr6-3. It is a material in the category Spring steels. Designations recorded for this grade: 4." canonical: https://steelequivalents.com/materials/material-no/1.7104 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.7104.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.7104.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.7104.md es: https://steelequivalents.com/es/materiales/número-de-material/1.7104.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.7104.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.7104.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.7104.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.7104.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.7104.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.7104.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.7104.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.7104.md zh: https://steelequivalents.com/zh/材料/材料编号/1.7104.md ja: https://steelequivalents.com/ja/材料/材料番号/1.7104.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.7104.md ko: https://steelequivalents.com/ko/재료/재료번호/1.7104.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.7104.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.7104.md content_hash: sha256:9e5c9be7b05d05f9399ac14e27abe9b9faf18dedd569e788bdfec9f0ddcf0bca 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/1.7104 > Canonical URL: https://steelequivalents.com/materials/material-no/1.7104 > 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 · 4 designations # 1.7104 1.7104 is the material number of the grade also listed as 55SiCr6-3. It is a material in the category Spring steels. We list 4 designations recorded for this grade, in the standards DIN / EN, UNS and AISI / SAE. - ***Material no.* **1.7104**** - [*Category* **Spring steels · 52 grades**](/categories/spring-steels "Category: Spring steels · 52 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=34f556af-79f5-47f8-b8dc-107502eec818 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.7104.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 55SiCr6-3 This grade’s own name](/materials/din-en/55sicr6-3 "DIN / EN 55SiCr6-3") - [UNS G92540 This grade’s own name · 3 grades on that route](/materials/uns/g92540 "UNS G92540") - [AISI / SAE 9254 This grade’s own name · 2 grades on that route](/materials/aisi-sae/9254 "AISI / SAE 9254") ## 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 4 designations · 3 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 - [55SiCr6-3 This grade’s own name](/materials/din-en/55sicr6-3 "DIN / EN 55SiCr6-3") UNS United States · 2 - [G92540 This grade’s own name](/materials/uns/g92540 "UNS G92540") - [K15590 This grade’s own name](/materials/uns/k15590 "UNS K15590") AISI / SAE United States · 1 - [9254 This grade’s own name](/materials/aisi-sae/9254 "AISI / SAE 9254") 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 Si Mn Cr Iron — the balance, never listed by a standard — 96.5 % Si — 1.4 % Mn — 0.7 % Cr — 0.7 % Traces & impurities · 0.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.5–0.6 | | Si | 1.2–1.6 | | Mn | 0.5–0.9 | | P | 0.03 | | S | 0.025 | | Cr | 0.5–0.8 | | Cu | ≤ 0.12 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Copper 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 | 0,50-0,60 | 0.500 | 0.600 | Range | | Si | 1,20-1,60 | 1.200 | 1.600 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Cr | 0,50-0,80 | 0.500 | 0.800 | Range | | Mn | 0,50-0,90 | 0.500 | 0.900 | Range | | Cu | ≤0,12 | — | 0.120 | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Mo. ## 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. ## 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 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. [54SiCr6 1.7102 Si 1,20-1,60 · Mn 0,50-0,80 - ΔSi 0.00 - ΔMn 0.05 - 32 designations](/materials/din-en/54sicr6 "54SiCr6")[67SiCr5 1.7103 Si 1,20-1,40 · Mn 0,40-0,60 - ΔSi 0.10 - ΔMn 0.20 - 2 designations](/materials/din-en/67sicr5 "67SiCr5")[56SiCr7 1.7106 Si 1,60-2,00 · Mn 0,70-1,00 - ΔSi 0.40 - ΔMn 0.15 - 3 designations](/materials/din-en/56sicr7 "56SiCr7")[61SiCr7 1.7108 Si 1,60-2,00 · Mn 0,70-1,00 - ΔSi 0.40 - ΔMn 0.15 - 20 designations](/materials/din-en/61sicr7 "61SiCr7") ## 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=34f556af-79f5-47f8-b8dc-107502eec818 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.7104.pdf "Datasheet as PDF")