--- title: "H10380 — Quenched and tempered steels" description: "H10380 in UNS: material number 1.1181, also listed as C35E. Category: Quenched and tempered steels. Designations recorded for this grade: 36." canonical: https://steelequivalents.com/materials/uns/h10380 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/h10380.md cs: https://steelequivalents.com/cs/materiály/uns/h10380.md de: https://steelequivalents.com/de/werkstoffe/uns/h10380.md es: https://steelequivalents.com/es/materiales/uns/h10380.md fr: https://steelequivalents.com/fr/matériaux/uns/h10380.md hu: https://steelequivalents.com/hu/anyagok/uns/h10380.md it: https://steelequivalents.com/it/materiali/uns/h10380.md nl: https://steelequivalents.com/nl/materialen/uns/h10380.md pl: https://steelequivalents.com/pl/materiały/uns/h10380.md pt: https://steelequivalents.com/pt/materiais/uns/h10380.md ru: https://steelequivalents.com/ru/материалы/uns/h10380.md tr: https://steelequivalents.com/tr/malzemeler/uns/h10380.md zh: https://steelequivalents.com/zh/材料/uns/h10380.md ja: https://steelequivalents.com/ja/材料/uns/h10380.md ar: https://steelequivalents.com/ar/المواد/uns/h10380.md ko: https://steelequivalents.com/ko/재료/uns/h10380.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/h10380.md hi: https://steelequivalents.com/hi/सामग्री/uns/h10380.md content_hash: sha256:275afb963d2a167dcf54240745b36909e3ef2989beb39b2fc461895590b85759 generated: 2026-09-22 --- > **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/uns/h10380 > Canonical URL: https://steelequivalents.com/materials/uns/h10380 > 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. UNS · United States · 36 designations # H10380 H10380 is a designation in UNS for the material held under material number 1.1181, also listed as C35E. It is a material in the category Quenched and tempered steels. We list 36 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, ABNT NBR, COPANT, STN, PN, MKE, MSZ, STAS and SFS. - [*Material no.* **1.1181**](/materials/material-no/1.1181 "Material no.: 1.1181") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **36** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=ed6cfedd-f99c-4d68-a93b-eb1d92f91bbd&designation=df33d253-d399-44d6-b46c-ddc30fff3448 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/h10380.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C35E This grade’s own name](/materials/din-en/c35e "DIN / EN C35E") - [UNS G10340 This grade’s own name · 3 grades on that route](/materials/uns/g10340 "UNS G10340") - [AISI / SAE 1034 This grade’s own name · 3 grades on that route](/materials/aisi-sae/1034 "AISI / SAE 1034") - [AFNOR XC 32 This grade’s own name · 8 grades on that route](/materials/afnor/xc32 "AFNOR XC 32") - [SS SIS 14 1572 This grade’s own name](/materials/ss/sis-14-1572 "SS SIS 14 1572") ## 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 36 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 - [C35E This grade’s own name](/materials/din-en/c35e "DIN / EN C35E") - [Ck 35 This grade’s own name Withdrawn](/materials/din-en/ck35 "DIN / EN Ck 35") UNS United States · 4 - [G10340 This grade’s own name](/materials/uns/g10340 "UNS G10340") - [G10350 This grade’s own name](/materials/uns/g10350 "UNS G10350") - [G10380 This grade’s own name](/materials/uns/g10380 "UNS G10380") - **H10380 This grade’s own name** AISI / SAE United States · 5 - [1034 This grade’s own name](/materials/aisi-sae/1034 "AISI / SAE 1034") - [1035 This grade’s own name](/materials/aisi-sae/1035 "AISI / SAE 1035") - [1038 This grade’s own name](/materials/aisi-sae/1038 "AISI / SAE 1038") - [1038H This grade’s own name](/materials/aisi-sae/1038h "AISI / SAE 1038H") - [C1034 This grade’s own name](/materials/aisi-sae/c1034 "AISI / SAE C1034") BS United Kingdom · 2 - [080M36 Indicative](/materials/bs/080m36 "BS 080M36") - [CFS6 Indicative](/materials/bs/cfs6 "BS CFS6") AFNOR France · 3 - [XC 32 This grade’s own name](/materials/afnor/xc32 "AFNOR XC 32") - [XC 38H1 This grade’s own name](/materials/afnor/xc38h1 "AFNOR XC 38H1") - [XC38 Indicative](/materials/afnor/xc38 "AFNOR XC38") UNE Spain · 2 - [C35k Indicative](/materials/une/c35k "UNE C35k") - [F1130 Indicative](/materials/une/f1130 "UNE F1130") ISO International · 1 - [C35E4 Indicative](/materials/iso/c35e4 "ISO C35E4") JIS Japan · 2 - [S35C Indicative](/materials/jis/s35c "JIS S35C") - [S38C Indicative](/materials/jis/s38c "JIS S38C") GB China · 1 - [35 Indicative](/materials/gb/35 "GB 35") GOST Russia / CIS · 2 - [35 Indicative](/materials/gb/35 "GOST 35") - [ct35 Indicative](/materials/gost/ct35 "GOST ct35") UNI Italy · 1 - [C35 Indicative](/materials/din-en/c35 "UNI C35") SS Sweden · 2 - [1572 Indicative](/materials/gost/1572 "SS 1572") - [SIS 14 1572 This grade’s own name](/materials/ss/sis-14-1572 "SS SIS 14 1572") ČSN Czechia · 1 - [12040 Indicative](/materials/csn/12040 "ČSN 12040") ABNT NBR Brazil · 1 - [1035 Indicative](/materials/aisi-sae/1035 "ABNT NBR 1035") COPANT Latin America · 1 - [1038 Indicative](/materials/aisi-sae/1038 "COPANT 1038") STN Slovakia · 1 - [12 040 Indicative](/materials/csn/12040 "STN 12 040") PN Poland · 1 - [35 Indicative](/materials/gb/35 "PN 35") MKE Türkiye · 1 - [Ç 1030 Indicative](/materials/mke/c-1030 "MKE Ç 1030") MSZ Hungary · 1 - [C 35 Indicative](/materials/din-en/c35 "MSZ C 35") STAS Romania · 1 - [OLC35X Indicative](/materials/stas/olc35x "STAS OLC35X") SFS Finland · 1 - [C35 Indicative](/materials/din-en/c35 "SFS C35") 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 Si Cr Iron — the balance, never listed by a standard — 97.6 % Mn — 0.7 % Si — 0.4 % Cr — 0.4 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.32–0.39 | | Si | ≤ 0.4 | | Mn | 0.5–0.8 | | P | 0.03 | | S | 0.035 | | 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 | 0,32-0,39 | 0.320 | 0.390 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | ≤0,40 | — | 0.400 | Max | | Mn | 0,50-0,80 | 0.500 | 0.800 | 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 computed from composition · °C Predicted Ae3 783 °C Predicted Ae1 724 °C Predicted Acm 572 °C Predicted Bs 563 °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 7,73 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 9 conditions · 38 values By thickness**Normalized** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | ≤ 16 | 550 | 18 | | 16 – 100 | 520 | 19 | | 100 – 250 | 500 | 19 | | 250 – 500 | 480 | — | | 500 – 1000 | 470 | — | By thickness**Cold drawn / hard** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 5 – 10 | 650 – 1000 | 6 | | 10 – 16 | 600 – 950 | 7 | | 16 – 40 | 580 – 880 | 8 | | 40 – 63 | 550 – 840 | 9 | | 63 – 100 | 520 – 800 | 9 | By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | ReH N/mm² | Rm N/mm² | A% | |---|---|---|---| | ≤ 8 | 430 | 630 | 17 | | 8 – 20 | 380 | 600 | 19 | | 20 – 50 | 320 | 550 | 20 | | 50 – 80 | 290 | 500 | 20 | By thickness**Soft annealed** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | 0.3 – 3 | 540 | By thickness**Cold rolled** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | 0.3 – 3 | 930 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 154 – 207 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | HV | |---|---|---| | Soft annealed | 183 | 170 | By delivery state**Cold rolled** source `steelnumber` | Delivery state | HV | |---|---| | Cold rolled | 275 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Electrical resistivity nΩ·m | |---|---|---| | 20 | 7.55 | 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. [C30E 1.1178 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 19 designations](/materials/din-en/c30e "C30E")[C30R 1.1179 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 11 designations](/materials/din-en/c30r "C30R")[C35 1.1180 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 17 designations](/materials/din-en/c35 "C35")[C40E 1.1186 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 25 designations](/materials/din-en/c40e "C40E")[C40R 1.1189 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 14 designations](/materials/din-en/c40r "C40R")[1.1191 1.1191 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 39 designations](/materials/material-no/1.1191 "1.1191") ## 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=ed6cfedd-f99c-4d68-a93b-eb1d92f91bbd&designation=df33d253-d399-44d6-b46c-ddc30fff3448 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/h10380.pdf "Datasheet as PDF")