--- title: "1.0535 — Quenched and tempered steels" description: "1.0535 is the material number of the grade also listed as C55. Category: Quenched and tempered steels. Designations recorded for this grade: 101." canonical: https://steelequivalents.com/materials/material-no/1.0535 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0535.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0535.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0535.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0535.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0535.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0535.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0535.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0535.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0535.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0535.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0535.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0535.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0535.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0535.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0535.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0535.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0535.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0535.md content_hash: sha256:47d20c266cad462f019b41d33946df2bc7dcfab312f2a2f1fa9f7b53b4e7b4e6 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/1.0535 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0535 > 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 · 101 designations # 1.0535 1.0535 is the material number of the grade also listed as C55. It is a material in the category Quenched and tempered steels. We list 101 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, STN, PN, SRPS, MSZ, AS / NZS, STAS, BDS, NBN and KS. - ***Material no.* **1.0535**** - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **101** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=2a2cdc95-2f1f-4391-ad8c-978a59c88c9f "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0535.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C55 This grade’s own name](/materials/din-en/c55 "DIN / EN C55") - [UNS G10550 This grade’s own name · 10 grades on that route](/materials/uns/g10550 "UNS G10550") - [AISI / SAE 1055 This grade’s own name · 10 grades on that route](/materials/aisi-sae/1055 "AISI / SAE 1055") ## About Quenched and tempered steels Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 101 designations · 22 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 · 3 - **1.0535 Indicative** - [C55 This grade’s own name](/materials/din-en/c55 "DIN / EN C55") - [CF53 Indicative](/materials/din-en/cf53 "DIN / EN CF53") UNS United States · 2 - [G10550 This grade’s own name](/materials/uns/g10550 "UNS G10550") - [G10600 Indicative](/materials/uns/g10600 "UNS G10600") AISI / SAE United States · 7 - [1049 Indicative](/materials/aisi-sae/1049 "AISI / SAE 1049") - [1050 Indicative](/materials/aisi-sae/1050 "AISI / SAE 1050") - [1055 This grade’s own name](/materials/aisi-sae/1055 "AISI / SAE 1055") - [1060 Indicative](/materials/aisi-sae/1060 "AISI / SAE 1060") - [G10490 Indicative](/materials/uns/g10490 "AISI / SAE G10490") - [G10500 Indicative](/materials/uns/g10500 "AISI / SAE G10500") - [G10550 Indicative](/materials/uns/g10550 "AISI / SAE G10550") BS United Kingdom · 9 - [060A52 Indicative](/materials/bs/060a52 "BS 060A52") - [060A57 Indicative](/materials/bs/060a57 "BS 060A57") - [070M55 Indicative](/materials/bs/070m55 "BS 070M55") - [080A52 Indicative](/materials/bs/080a52 "BS 080A52") - [080M50 Indicative](/materials/bs/080m50 "BS 080M50") - [C50E Indicative](/materials/din-en/c50e "BS C50E") - [C55 Indicative](/materials/din-en/c55 "BS C55") - [C55E Indicative](/materials/din-en/c55e "BS C55E") - [En9 Indicative](/materials/bs/en9 "BS En9") AFNOR France · 18 - [1C55 Indicative](/materials/afnor/1c55 "AFNOR 1C55") - [2C50 Indicative](/materials/afnor/2c50 "AFNOR 2C50") - [2C55 Indicative](/materials/afnor/2c55 "AFNOR 2C55") - [AF70 Indicative](/materials/afnor/af70 "AFNOR AF70") - [AF70C55 Indicative](/materials/afnor/af70c55 "AFNOR AF70C55") - [C45E Indicative](/materials/din-en/c45e "AFNOR C45E") - [C50E Indicative](/materials/din-en/c50e "AFNOR C50E") - [C50RR Indicative](/materials/afnor/c50rr "AFNOR C50RR") - [C54 Indicative](/materials/afnor/c54 "AFNOR C54") - [C55 Indicative](/materials/din-en/c55 "AFNOR C55") - [C55E Indicative](/materials/din-en/c55e "AFNOR C55E") - [XC48H1 Indicative](/materials/afnor/xc48h1 "AFNOR XC48H1") - [XC48H1TS Indicative](/materials/afnor/xc48h1ts "AFNOR XC48H1TS") - [XC48TS Indicative](/materials/afnor/xc48ts "AFNOR XC48TS") - [XC50 Indicative](/materials/afnor/xc50 "AFNOR XC50") - [XC54 Indicative](/materials/afnor/xc54 "AFNOR XC54") - [XC55 Indicative](/materials/afnor/xc55 "AFNOR XC55") - [XC55H1 Indicative](/materials/afnor/xc55h1 "AFNOR XC55H1") UNE Spain · 5 - [C50E Indicative](/materials/din-en/c50e "UNE C50E") - [C55 Indicative](/materials/din-en/c55 "UNE C55") - [C55E Indicative](/materials/din-en/c55e "UNE C55E") - [C55k Indicative](/materials/une/c55k "UNE C55k") - [F.1150 Indicative](/materials/une/f1150 "UNE F.1150") ISO International · 3 - [C50 Indicative](/materials/din-en/c50 "ISO C50") - [C55 Indicative](/materials/din-en/c55 "ISO C55") - [C55E4 Indicative](/materials/iso/c55e4 "ISO C55E4") JIS Japan · 5 - [S40C Indicative](/materials/jis/s40c "JIS S40C") - [S50C Indicative](/materials/jis/s50c "JIS S50C") - [S53C Indicative](/materials/jis/s53c "JIS S53C") - [S55C Indicative](/materials/jis/s55c "JIS S55C") - [S55C-CSP Indicative](/materials/jis/s55c-csp "JIS S55C-CSP") GB China · 5 - [50 Indicative](/materials/bds/50 "GB 50") - [55 Indicative](/materials/bds/55 "GB 55") - [SM50 Indicative](/materials/gb/sm50 "GB SM50") - [SM55 Indicative](/materials/gb/sm55 "GB SM55") - [ZG340-640 Indicative](/materials/gb/zg340-640 "GB ZG340-640") GOST Russia / CIS · 6 - [50 Indicative](/materials/bds/50 "GOST 50") - [55 Indicative](/materials/bds/55 "GOST 55") - [55KH Indicative](/materials/gost/55kh "GOST 55KH") - [55SL Indicative](/materials/gost/55sl "GOST 55SL") - [55пп Indicative](/materials/gost/55pp "GOST 55пп") - [58 Indicative](/materials/gost/58 "GOST 58") UNI Italy · 8 - [1C55 Indicative](/materials/afnor/1c55 "UNI 1C55") - [C50 Indicative](/materials/din-en/c50 "UNI C50") - [C50E Indicative](/materials/din-en/c50e "UNI C50E") - [C50R Indicative](/materials/din-en/c50r "UNI C50R") - [C53 Indicative](/materials/nbn/c53 "UNI C53") - [C55 Indicative](/materials/din-en/c55 "UNI C55") - [C55E Indicative](/materials/din-en/c55e "UNI C55E") - [C55R Indicative](/materials/din-en/c55r "UNI C55R") SS Sweden · 2 - [1655 Indicative](/materials/ss/1655 "SS 1655") - [1674 Indicative](/materials/ss/1674 "SS 1674") ČSN Czechia · 2 - [12051 Indicative](/materials/csn/12051 "ČSN 12051") - [12060 Indicative](/materials/csn/12060 "ČSN 12060") STN Slovakia · 1 - [12 060 Indicative](/materials/csn/12060 "STN 12 060") PN Poland · 5 - [55 Indicative](/materials/bds/55 "PN 55") - [55A Indicative](/materials/pn/55a "PN 55A") - [55rs Indicative](/materials/pn/55rs "PN 55rs") - [60 Indicative](/materials/bds/60 "PN 60") - [D50 Indicative](/materials/pn/d50 "PN D50") SRPS Serbia · 1 - [Č.1630 Indicative](/materials/srps/c-1630 "SRPS Č.1630") MSZ Hungary · 2 - [C50E Indicative](/materials/din-en/c50e "MSZ C50E") - [C55E Indicative](/materials/din-en/c55e "MSZ C55E") AS / NZS Australia / New Zealand · 2 - [1050 Indicative](/materials/aisi-sae/1050 "AS / NZS 1050") - [1055 Indicative](/materials/aisi-sae/1055 "AS / NZS 1055") STAS Romania · 5 - [OLC50AT Indicative](/materials/stas/olc50at "STAS OLC50AT") - [OLC50X Indicative](/materials/stas/olc50x "STAS OLC50X") - [OLC55 Indicative](/materials/stas/olc55 "STAS OLC55") - [OLC55A Indicative](/materials/stas/olc55a "STAS OLC55A") - [OLC55X Indicative](/materials/stas/olc55x "STAS OLC55X") BDS Bulgaria · 5 - [50 Indicative](/materials/bds/50 "BDS 50") - [55 Indicative](/materials/bds/55 "BDS 55") - [C50E Indicative](/materials/din-en/c50e "BDS C50E") - [C55 Indicative](/materials/din-en/c55 "BDS C55") - [C55E Indicative](/materials/din-en/c55e "BDS C55E") NBN Belgium · 3 - [C53 Indicative](/materials/nbn/c53 "NBN C53") - [C55-1 Indicative](/materials/nbn/c55-1 "NBN C55-1") - [C55-2 Indicative](/materials/nbn/c55-2 "NBN C55-2") KS South Korea · 2 - [SM50C Indicative](/materials/ks/sm50c "KS SM50C") - [SM55C Indicative](/materials/ks/sm55c "KS SM55C") 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 Mn C Si Iron — the balance, never listed by a standard — 97.3 % Mn — 0.8 % C — 0.6 % Si — 0.4 % 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 | ≤ 0.4 | | Mn | 0.6–0.9 | | P | 0.045 | | S | 0.045 | | 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 | ≤0,40 | — | 0.400 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,045 | 0.045 | 0.045 | Exact | | Cr | ≤0,40 | — | 0.400 | Max | | Mn | 0,60-0,90 | 0.600 | 0.900 | Range | | Ni | ≤0,40 | — | 0.400 | Max | | Mo | ≤0,10 | — | 0.100 | Max | - (Cr + Mo + Ni) ≤ 0,63 - (Cr + Mo + Ni) ≤ 0,63 - (Cr + Mo + Ni) ≤ 0,63 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 744 °C Predicted Ae1 723 °C Predicted Acm 687 °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 7,85 g/cm³ Exact Transformation point Ac1 725 °C Exact Transformation point Ac3 760 °C Exact · Ac3(Acm) Transformation point Ar3 750 °C Exact · Ar3(Arcm) Transformation point Ar1 690 °C Exact Weldability difficult to weld As published: hard weldability. 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 9 conditions · 67 values By thickness**Normalized** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | ≤ 16 | 680 | 11 | | 16 – 100 | 640 | 12 | | 100 – 250 | 620 | 12 | | 250 – 500 | 600 | — | | 500 – 1000 | 590 | — | By thickness**Cold drawn / hard** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 5 – 10 | 770 – 1100 | 5 | | 10 – 16 | 730 – 1080 | 6 | | 16 – 40 | 690 – 1050 | 7 | | 40 – 63 | 650 – 1030 | 8 | By delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | A5% | Z% | HB | |---|---|---|---|---| | Rolled stock cold-worked , GOST 1050-88 | 660 | 6 | 30 | — | | Rolled stock annealed , GOST 1050-88 | 560 | 12 | 40 | — | | Bar GOST 10702-78 | — | — | — | 217 | | Rolled stock GOST 1050-88 | — | — | — | 241 | By dimension**Normalizing** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | to 80 | 630 | 375 | 14 | 40 | By delivery state**Treated to improve shearability** source `steelnumber` | Delivery state | HB | |---|---| | Treated to improve shearability | 255 | By dimension**Annealing** source `splav` | Dimension mm | Rm N/mm² | A5% | |---|---|---| | 6 - 60 | 580 | 17 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 229 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 181 – 269 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal expansion coefficient 10^-6/K | Thermal conductivity W/(m·K) | Specific heat capacity J/(kg·K) | Electrical resistivity nΩ·m | |---|---|---|---|---|---|---| | 20 | 7.81 | 216 | — | 48 | — | 272 | | 100 | — | 213 | 11.2 | 48 | 487 | — | | 200 | — | 207 | 12 | 47 | 500 | — | | 300 | — | 200 | 12.8 | 44 | 517 | — | | 400 | — | 180 | 13.4 | 41 | 533 | — | | 500 | — | 171 | 13.9 | 38 | 559 | — | | 600 | — | 154 | 14.2 | 35 | 584 | — | | 700 | — | 136 | 14.5 | 31 | — | — | | 800 | — | 123 | 13.4 | 27 | — | — | 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 - Normalizing and Tempering Supply condition 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/azhlNWIxMzUwOTE_ "Source: www.caishuku.com") ## 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. [C50 1.0540 Mn 0,60-0,90 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 25 designations](/materials/din-en/c50 "C50")[1.0601 1.0601 Mn 0,60-0,90 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 92 designations](/materials/material-no/1.0601 "1.0601")[E255 1.0408 Mn 0,40-1,10 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.03 - 10 designations](/materials/din-en/e255 "E255")[C26D 1.0415 Mn 0,50-0,80 · Si 0,10-0,30 - ΔMn 0.10 - ΔSi 0.00 - 8 designations](/materials/din-en/c26d "C26D")[1.0501 1.0501 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 123 designations](/materials/material-no/1.0501 "1.0501")[C35GPb 1.0502 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 2 designations](/materials/din-en/c35gpb "C35GPb") ## 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=2a2cdc95-2f1f-4391-ad8c-978a59c88c9f "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0535.pdf "Datasheet as PDF")