--- title: "H10450 — Quenched and tempered steels" description: "H10450 in UNS: material number 1.1191, also listed as C45E. Category: Quenched and tempered steels. Designations recorded for this grade: 39." canonical: https://steelequivalents.com/materials/uns/h10450 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/h10450.md cs: https://steelequivalents.com/cs/materiály/uns/h10450.md de: https://steelequivalents.com/de/werkstoffe/uns/h10450.md es: https://steelequivalents.com/es/materiales/uns/h10450.md fr: https://steelequivalents.com/fr/matériaux/uns/h10450.md hu: https://steelequivalents.com/hu/anyagok/uns/h10450.md it: https://steelequivalents.com/it/materiali/uns/h10450.md nl: https://steelequivalents.com/nl/materialen/uns/h10450.md pl: https://steelequivalents.com/pl/materiały/uns/h10450.md pt: https://steelequivalents.com/pt/materiais/uns/h10450.md ru: https://steelequivalents.com/ru/материалы/uns/h10450.md tr: https://steelequivalents.com/tr/malzemeler/uns/h10450.md zh: https://steelequivalents.com/zh/材料/uns/h10450.md ja: https://steelequivalents.com/ja/材料/uns/h10450.md ar: https://steelequivalents.com/ar/المواد/uns/h10450.md ko: https://steelequivalents.com/ko/재료/uns/h10450.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/h10450.md hi: https://steelequivalents.com/hi/सामग्री/uns/h10450.md content_hash: sha256:265b61eb3318f187d9f52b65e3709bb0c59fa46e4b0f8bbc5e8eb2c223706404 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/h10450 > Canonical URL: https://steelequivalents.com/materials/uns/h10450 > 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 · 39 designations # H10450 H10450 is a designation in UNS for the material held under material number 1.1191, also listed as C45E. It is a material in the category Quenched and tempered steels. We list 39 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, ABNT NBR, COPANT, STN, PN, HRN, MSZ, AS / NZS and SFS. - [*Material no.* **1.1191**](/materials/material-no/1.1191 "Material no.: 1.1191") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **39** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=3626b87e-5a29-4017-b9fb-9b30d450379b&designation=4736f16d-c014-44df-bc18-a4c753bb1109 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/h10450.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C45E This grade’s own name · 2 grades on that route](/materials/din-en/c45e "DIN / EN C45E") - [UNS G10420 This grade’s own name · 5 grades on that route](/materials/uns/g10420 "UNS G10420") - [AISI / SAE 1042 This grade’s own name · 8 grades on that route](/materials/aisi-sae/1042 "AISI / SAE 1042") - [ASTM A 194 Gr. 2 This grade’s own name](/materials/astm/a-194-gr-2 "ASTM A 194 Gr. 2") - [SS SIS 1672 This grade’s own name](/materials/ss/sis-1672 "SS SIS 1672") ## 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 39 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 - [1.1191 Indicative](/materials/material-no/1.1191 "DIN / EN 1.1191") - [C45E This grade’s own name](/materials/din-en/c45e "DIN / EN C45E") - [Ck 45 This grade’s own name Withdrawn](/materials/snv/ck45 "DIN / EN Ck 45") UNS United States · 3 - [G10420 This grade’s own name](/materials/uns/g10420 "UNS G10420") - [G10450 This grade’s own name](/materials/uns/g10450 "UNS G10450") - **H10450 This grade’s own name** AISI / SAE United States · 3 - [1042 This grade’s own name](/materials/aisi-sae/1042 "AISI / SAE 1042") - [1045 This grade’s own name](/materials/aisi-sae/1045 "AISI / SAE 1045") - [1045H This grade’s own name](/materials/aisi-sae/1045h "AISI / SAE 1045H") ASTM United States · 2 - [A 194 Gr. 2 This grade’s own name](/materials/astm/a-194-gr-2 "ASTM A 194 Gr. 2") - [A830 Indicative](/materials/astm/a830 "ASTM A830") BS United Kingdom · 3 - [060A47 Indicative](/materials/bs/060a47 "BS 060A47") - [080M46 Indicative](/materials/bs/080m46 "BS 080M46") - [CFS8 Indicative](/materials/bs/cfs8 "BS CFS8") AFNOR France · 4 - [XC42 Indicative](/materials/afnor/xc42 "AFNOR XC42") - [XC42H1 Indicative](/materials/afnor/xc42h1 "AFNOR XC42H1") - [XC45 Indicative](/materials/afnor/xc45 "AFNOR XC45") - [XC48H1 Indicative](/materials/afnor/xc48h1 "AFNOR XC48H1") UNE Spain · 3 - [C45K Indicative](/materials/une/c45k "UNE C45K") - [F.1140-C45k Indicative](/materials/une/f-1140-c45k "UNE F.1140-C45k") - [F1140 Indicative](/materials/une/f1140 "UNE F1140") ISO International · 1 - [C45E4 Indicative](/materials/iso/c45e4 "ISO C45E4") JIS Japan · 1 - [S45C Indicative](/materials/jis/s45c "JIS S45C") GB China · 3 - [45 Indicative](/materials/gb/45 "GB 45") - [45H Indicative](/materials/pn/45h "GB 45H") - [Ck45 Indicative](/materials/snv/ck45 "GB Ck45") GOST Russia / CIS · 1 - [45 Indicative](/materials/gb/45 "GOST 45") UNI Italy · 1 - [C45 Indicative](/materials/din-en/c45 "UNI C45") SS Sweden · 2 - [1672 Indicative](/materials/ss/1672 "SS 1672") - [SIS 1672 This grade’s own name](/materials/ss/sis-1672 "SS SIS 1672") ČSN Czechia · 1 - [12050 Indicative](/materials/csn/12050 "ČSN 12050") ABNT NBR Brazil · 1 - [1045 Indicative](/materials/aisi-sae/1045 "ABNT NBR 1045") COPANT Latin America · 1 - [1045 Indicative](/materials/aisi-sae/1045 "COPANT 1045") STN Slovakia · 1 - [12 050 Indicative](/materials/csn/12050 "STN 12 050") PN Poland · 1 - [45 Indicative](/materials/gb/45 "PN 45") HRN Croatia · 1 - [Č.1531 Indicative](/materials/hrn/c-1531 "HRN Č.1531") MSZ Hungary · 1 - [C 45 Indicative](/materials/din-en/c45 "MSZ C 45") AS / NZS Australia / New Zealand · 1 - [K1045 Indicative](/materials/as-nzs/k1045 "AS / NZS K1045") SFS Finland · 1 - [C45 Indicative](/materials/din-en/c45 "SFS C45") 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 — 97.5 % Mn — 0.7 % C — 0.5 % Si — 0.4 % Traces & impurities · 1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.42–0.5 | | 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 | 0,42-0,50 | 0.420 | 0.500 | 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 764 °C Predicted Ae1 724 °C Predicted Acm 637 °C Predicted Bs 556 °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 7,7 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 | 620 | 14 | | 16 – 100 | 580 | 16 | | 100 – 250 | 560 | 16 | | 250 – 500 | 540 | — | | 500 – 1000 | 530 | — | By thickness**Cold drawn / hard** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 5 – 10 | 750 – 1050 | 5 | | 10 – 16 | 710 – 1030 | 6 | | 16 – 40 | 650 – 1000 | 7 | | 40 – 63 | 630 – 900 | 8 | | 63 – 100 | 580 – 850 | 8 | By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | ReH N/mm² | Rm N/mm² | A% | |---|---|---|---| | ≤ 8 | 490 | 700 | 14 | | 8 – 20 | 430 | 650 | 16 | | 20 – 50 | 370 | 630 | 17 | | 50 – 80 | 340 | 600 | 17 | By thickness**Soft annealed** source `steelnumber` | Thickness mm | Rm N/mm² | A80% | |---|---|---| | 0.3 – 3 | 570 | 18 | By thickness**Cold rolled** source `steelnumber` | Thickness mm | Rm N/mm² | |---|---| | 0.3 – 3 | 1020 | By delivery state**Treated to improve shearability** source `steelnumber` | Delivery state | HB | |---|---| | Treated to improve shearability | 255 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | HV | |---|---|---| | Soft annealed | 207 | 180 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 172 – 242 | By delivery state**Cold rolled** source `steelnumber` | Delivery state | HV | |---|---| | Cold rolled | 290 | 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")[C35E 1.1181 Mn 0,50-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 36 designations](/materials/din-en/c35e "C35E")[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") ## 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=3626b87e-5a29-4017-b9fb-9b30d450379b&designation=4736f16d-c014-44df-bc18-a4c753bb1109 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/h10450.pdf "Datasheet as PDF")