--- title: "1.0603 — Spring steels" description: "1.0603 is the material number of the grade also listed as C67. It is a material in the category Spring steels. Designations recorded for this grade: 15." canonical: https://steelequivalents.com/materials/material-no/1.0603 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0603.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0603.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0603.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0603.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0603.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0603.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0603.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0603.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0603.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0603.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0603.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0603.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0603.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0603.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0603.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0603.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0603.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0603.md content_hash: sha256:ad612468832111e6b43830fd60972232d0efe3427a94342f67f1df0635a30aec 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/1.0603 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0603 > 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 · 15 designations # 1.0603 1.0603 is the material number of the grade also listed as C67. It is a material in the category Spring steels. We list 15 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, AFNOR, ISO, JIS, GOST, ČSN, STN and PN. - ***Material no.* **1.0603**** - [*Category* **Spring steels · 52 grades**](/categories/spring-steels "Category: Spring steels · 52 grades") - *Designations* **15** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=657adf88-88ab-4381-8e5c-e5d510ba1a41 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0603.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C67 This grade’s own name](/materials/din-en/c67 "DIN / EN C67") - [UNS G10700 This grade’s own name · 7 grades on that route](/materials/uns/g10700 "UNS G10700") - [AISI / SAE 1070 This grade’s own name · 7 grades on that route](/materials/aisi-sae/1070 "AISI / SAE 1070") - [ASTM 5115H This grade’s own name](/materials/astm/5115h "ASTM 5115H") ## 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 15 designations · 11 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 - [C67 This grade’s own name](/materials/din-en/c67 "DIN / EN C67") UNS United States · 1 - [G10700 This grade’s own name](/materials/uns/g10700 "UNS G10700") AISI / SAE United States · 3 - [1065 Indicative](/materials/aisi-sae/1065 "AISI / SAE 1065") - [1070 This grade’s own name](/materials/aisi-sae/1070 "AISI / SAE 1070") - [J403 Indicative](/materials/aisi-sae/j403 "AISI / SAE J403") ASTM United States · 1 - [5115H This grade’s own name](/materials/astm/5115h "ASTM 5115H") AFNOR France · 1 - [XC68 Indicative](/materials/afnor/xc68 "AFNOR XC68") ISO International · 1 - [CS65 Indicative](/materials/iso/cs65 "ISO CS65") JIS Japan · 1 - [S65CM Indicative](/materials/jis/s65cm "JIS S65CM") GOST Russia / CIS · 1 - [65 Indicative](/materials/gb/65 "GOST 65") ČSN Czechia · 2 - [12 061 Indicative](/materials/csn/12061 "ČSN 12 061") - [12071 Indicative](/materials/csn/12071 "ČSN 12071") STN Slovakia · 1 - [12061 Indicative](/materials/csn/12061 "STN 12061") PN Poland · 2 - [65 Indicative](/materials/gb/65 "PN 65") - [gat. 65 Indicative](/materials/pn/gat-65 "PN gat. 65") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 5 elements on file · weight % What this alloy is Fe Mn C Si Iron — the balance, never listed by a standard — 98.2 % Mn — 0.8 % C — 0.7 % Si — 0.3 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.65–0.72 | | Si | 0.15–0.35 | | Mn | 0.6–0.9 | | P | 0.045 | | S | 0.045 | Carbon Silicon Manganese Phosphorus Sulfur 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 | 0,65-0,72 | 0.650 | 0.720 | Range | | Si | 0,15-0,35 | 0.150 | 0.350 | Range | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,045 | 0.045 | 0.045 | Exact | | 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, Cr, 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 1.0, 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. [C75 1.0605 Mn 0,60-0,80 · Si 0,15-0,35 - ΔMn 0.05 - ΔSi 0.00 - 14 designations](/materials/din-en/c75 "C75")[C76D 1.0614 Mn 0,50-0,80 · Si 0,10-0,30 - ΔMn 0.10 - ΔSi 0.05 - 8 designations](/materials/din-en/c76d "C76D")[C86D 1.0616 Mn 0,50-0,80 · Si 0,10-0,30 - ΔMn 0.10 - ΔSi 0.05 - 14 designations](/materials/din-en/c86d "C86D") ## 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=657adf88-88ab-4381-8e5c-e5d510ba1a41 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0603.pdf "Datasheet as PDF")