--- title: "1.0401 — Case hardening steels" description: "1.0401 is the material number of the grade also listed as C15. It is a material in the category Case hardening steels. Designations recorded for this grade: 62." canonical: https://steelequivalents.com/materials/material-no/1.0401 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0401.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0401.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0401.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0401.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0401.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0401.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0401.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0401.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0401.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0401.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0401.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0401.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0401.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0401.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0401.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0401.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0401.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0401.md content_hash: sha256:3e06fde1234af72b9a924fbac5f91e95067aec857619624aeb0b6156c735c4f6 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/1.0401 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0401 > 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 · 62 designations # 1.0401 1.0401 is the material number of the grade also listed as C15. It is a material in the category Case hardening steels. We list 62 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GB, GOST, UNI, SS, ČSN, COPANT, PN, SRPS, HRN, MSZ, AS / NZS, STAS, BDS, ÖNORM, NBN, SNV and KS. - ***Material no.* **1.0401**** - [*Category* **Case hardening steels · 60 grades**](/categories/case-hardening-steels "Category: Case hardening steels · 60 grades") - *Designations* **62** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f16a039f-e315-4978-bcd6-04d02576c967 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0401.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C15 This grade’s own name · 2 grades on that route](/materials/is/c15 "DIN / EN C15") - [UNS G10150 This grade’s own name · 8 grades on that route](/materials/uns/g10150 "UNS G10150") - [AISI / SAE 1015 This grade’s own name · 9 grades on that route](/materials/aisi-sae/1015 "AISI / SAE 1015") ## About Case hardening steels Case hardening steels are steels designed to develop a hard, wear-resistant surface while retaining a tough and ductile core. They are used for components such as gears, shafts and other machine parts exposed to contact wear and cyclic loading. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 62 designations · 24 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 - **1.0401 Indicative** - [C15 This grade’s own name](/materials/is/c15 "DIN / EN C15") - [Ck15 Indicative](/materials/snv/ck15 "DIN / EN Ck15") UNS United States · 2 - [G10150 This grade’s own name](/materials/uns/g10150 "UNS G10150") - [G10170 This grade’s own name](/materials/uns/g10170 "UNS G10170") AISI / SAE United States · 8 - [1015 This grade’s own name](/materials/aisi-sae/1015 "AISI / SAE 1015") - [1016 Indicative](/materials/aisi-sae/1016 "AISI / SAE 1016") - [1017 This grade’s own name](/materials/aisi-sae/1017 "AISI / SAE 1017") - [1018 Indicative](/materials/aisi-sae/1018 "AISI / SAE 1018") - [G10150 Indicative](/materials/uns/g10150 "AISI / SAE G10150") - [G10170 Indicative](/materials/uns/g10170 "AISI / SAE G10170") - [M1015 Indicative](/materials/aisi-sae/m1015 "AISI / SAE M1015") - [M1017 Indicative](/materials/aisi-sae/m1017 "AISI / SAE M1017") BS United Kingdom · 5 - [040A15 Indicative](/materials/bs/040a15 "BS 040A15") - [080A15 Indicative](/materials/bs/080a15 "BS 080A15") - [080M15 Indicative](/materials/bs/080m15 "BS 080M15") - [095M15 Indicative](/materials/bs/095m15 "BS 095M15") - [C15E Indicative](/materials/din-en/c15e "BS C15E") AFNOR France · 6 - [AF37C12 Indicative](/materials/afnor/af37c12 "AFNOR AF37C12") - [C18RR Indicative](/materials/afnor/c18rr "AFNOR C18RR") - [CC12 Indicative](/materials/afnor/cc12 "AFNOR CC12") - [XC12 Indicative](/materials/afnor/xc12 "AFNOR XC12") - [XC15 Indicative](/materials/afnor/xc15 "AFNOR XC15") - [XC18 Indicative](/materials/afnor/xc18 "AFNOR XC18") UNE Spain · 6 - [C15E Indicative](/materials/din-en/c15e "UNE C15E") - [C15k Indicative](/materials/une/c15k "UNE C15k") - [C16k Indicative](/materials/une/c16k "UNE C16k") - [F.111 Indicative](/materials/une/f-111 "UNE F.111") - [F.1110 Indicative](/materials/une/f-1110 "UNE F.1110") - [F.1511 Indicative](/materials/une/f-1511 "UNE F.1511") JIS Japan · 4 - [S15 Indicative](/materials/jis/s15 "JIS S15") - [S15C Indicative](/materials/jis/s15c "JIS S15C") - [S15CK Indicative](/materials/jis/s15ck "JIS S15CK") - [S17C Indicative](/materials/jis/s17c "JIS S17C") GB China · 3 - [15 Indicative](/materials/gb/15 "GB 15") - [H15A Indicative](/materials/gb/h15a "GB H15A") - [ZG200-400 Indicative](/materials/gb/zg200-400 "GB ZG200-400") GOST Russia / CIS · 2 - [15 Indicative](/materials/gb/15 "GOST 15") - [ct15 Indicative](/materials/gost/ct15 "GOST ct15") UNI Italy · 2 - [C15 Indicative](/materials/is/c15 "UNI C15") - [C16 Indicative](/materials/din-en/c16 "UNI C16") SS Sweden · 2 - [1350 Indicative](/materials/ss/1350 "SS 1350") - [1370 Indicative](/materials/ss/1370 "SS 1370") ČSN Czechia · 2 - [12020 Indicative](/materials/csn/12020 "ČSN 12020") - [12023 Indicative](/materials/csn/12023 "ČSN 12023") COPANT Latin America · 1 - [1016 Indicative](/materials/aisi-sae/1016 "COPANT 1016") PN Poland · 1 - [15 Indicative](/materials/gb/15 "PN 15") SRPS Serbia · 1 - [Č.1220 Indicative](/materials/srps/c-1220 "SRPS Č.1220") HRN Croatia · 1 - [Č.1220 Indicative](/materials/srps/c-1220 "HRN Č.1220") MSZ Hungary · 1 - [C15 Indicative](/materials/is/c15 "MSZ C15") AS / NZS Australia / New Zealand · 3 - [K1015 Indicative](/materials/as-nzs/k1015 "AS / NZS K1015") - [K1018 Indicative](/materials/as-nzs/k1018 "AS / NZS K1018") - [K1020 Indicative](/materials/as-nzs/k1020 "AS / NZS K1020") STAS Romania · 3 - [OLC15 Indicative](/materials/stas/olc15 "STAS OLC15") - [OLC15AT Indicative](/materials/stas/olc15at "STAS OLC15AT") - [OLC15X Indicative](/materials/stas/olc15x "STAS OLC15X") BDS Bulgaria · 1 - [15 Indicative](/materials/gb/15 "BDS 15") ÖNORM Austria · 1 - [RC15 Indicative](/materials/onorm/rc15 "ÖNORM RC15") NBN Belgium · 1 - [C16-2 Indicative](/materials/nbn/c16-2 "NBN C16-2") SNV Switzerland · 1 - [Ck15 Indicative](/materials/snv/ck15 "SNV Ck15") KS South Korea · 2 - [SM15C Indicative](/materials/ks/sm15c "KS SM15C") - [SM15CK Indicative](/materials/ks/sm15ck "KS SM15CK") 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 Si C Iron — the balance, never listed by a standard — 98.8 % Mn — 0.6 % Si — 0.4 % C — 0.2 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.12–0.18 | | Si | ≤ 0.4 | | Mn | 0.3–0.8 | | 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 | 0,12-0,18 | 0.120 | 0.180 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,045 | 0.045 | 0.045 | Exact | | Mn | 0,30-0,80 | 0.300 | 0.800 | 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. ## Properties by condition 2 conditions · 11 values By thickness**Cold drawn / hard** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 5 – 10 | 500 – 800 | 7 | | 10 – 16 | 480 – 780 | 8 | | 16 – 40 | 430 – 730 | 9 | | 40 – 63 | 380 – 670 | 11 | | 63 – 100 | 340 – 600 | 12 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 98 – 178 | 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 1.0, 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. [C15GPb 1.0403 Mn 0,30-0,80 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 2 designations](/materials/din-en/c15gpb "C15GPb")[C10 1.0301 Mn 0,30-0,60 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 63 designations](/materials/din-en/c10 "C10")[C10GPb 1.0302 Mn 0,30-0,60 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 2 designations](/materials/din-en/c10gpb "C10GPb") ## 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=f16a039f-e315-4978-bcd6-04d02576c967 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0401.pdf "Datasheet as PDF")