--- title: "17618 — Quenched and tempered steels" description: "17618 in ČSN: material number 1.3401, also listed as X120Mn12. Category: Quenched and tempered steels. Designations recorded for this grade: 57." canonical: https://steelequivalents.com/materials/csn/17618 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/17618.md cs: https://steelequivalents.com/cs/materiály/csn/17618.md de: https://steelequivalents.com/de/werkstoffe/csn/17618.md es: https://steelequivalents.com/es/materiales/csn/17618.md fr: https://steelequivalents.com/fr/matériaux/csn/17618.md hu: https://steelequivalents.com/hu/anyagok/csn/17618.md it: https://steelequivalents.com/it/materiali/csn/17618.md nl: https://steelequivalents.com/nl/materialen/csn/17618.md pl: https://steelequivalents.com/pl/materiały/csn/17618.md pt: https://steelequivalents.com/pt/materiais/csn/17618.md ru: https://steelequivalents.com/ru/материалы/csn/17618.md tr: https://steelequivalents.com/tr/malzemeler/csn/17618.md zh: https://steelequivalents.com/zh/材料/csn/17618.md ja: https://steelequivalents.com/ja/材料/csn/17618.md ar: https://steelequivalents.com/ar/المواد/csn/17618.md ko: https://steelequivalents.com/ko/재료/csn/17618.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/17618.md hi: https://steelequivalents.com/hi/सामग्री/csn/17618.md content_hash: sha256:f25ec18907e58232a6d2109ad67ec58d512a377a984150c1d87399bb3846da9b 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/csn/17618 > Canonical URL: https://steelequivalents.com/materials/csn/17618 > 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. ČSN · Czechia · 57 designations # 17618 17618 is a designation in ČSN for the material held under material number 1.3401, also listed as X120Mn12. It is a material in the category Quenched and tempered steels. We list 57 designations recorded for this grade, in the standards DIN / EN, AISI / SAE, ASTM, BS, AFNOR, UNE, JIS, GB, GOST, UNI, SS, ČSN, STN, SRPS, PN, MSZ, STAS, ÖNORM, SFS and KS. - [*Material no.* **1.3401**](/materials/material-no/1.3401 "Material no.: 1.3401") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **57** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=9a7a1f1b-1e27-4cb5-8f71-260f6152d4ad&designation=a4cca3d0-c98c-4954-b061-0a477ca44657 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/17618.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X120Mn12 This grade’s own name · 2 grades on that route](/materials/din-en/x120mn12 "DIN / EN X120Mn12") ## 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 57 designations · 20 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 - [1.3401 Indicative](/materials/material-no/1.3401 "DIN / EN 1.3401") - [X120Mn12 This grade’s own name](/materials/din-en/x120mn12 "DIN / EN X120Mn12") AISI / SAE United States · 7 - [A128 Indicative](/materials/aisi-sae/a128 "AISI / SAE A128") - [A128(A) Indicative](/materials/aisi-sae/a128-a "AISI / SAE A128(A)") - [J91109 Indicative](/materials/uns/j91109 "AISI / SAE J91109") - [J91119 Indicative](/materials/aisi-sae/j91119 "AISI / SAE J91119") - [J91129 Indicative](/materials/uns/j91129 "AISI / SAE J91129") - [J91139 Indicative](/materials/uns/j91139 "AISI / SAE J91139") - [J91149 Indicative](/materials/uns/j91149 "AISI / SAE J91149") ASTM United States · 2 - [A128 Indicative](/materials/aisi-sae/a128 "ASTM A128") - [A128(A) Indicative](/materials/aisi-sae/a128-a "ASTM A128(A)") BS United Kingdom · 6 - [BW10 Indicative](/materials/bs/bw10 "BS BW10") - [Ma2 Indicative](/materials/bs/ma2 "BS Ma2") - [Ma3 Indicative](/materials/bs/ma3 "BS Ma3") - [Ma5 Indicative](/materials/bs/ma5 "BS Ma5") - [MaZ Indicative](/materials/bs/maz "BS MaZ") - [Z120M12 Indicative](/materials/bs/z120m12 "BS Z120M12") AFNOR France · 4 - [GD 233 Indicative](/materials/afnor/gd-233 "AFNOR GD 233") - [Z120M12 Indicative](/materials/bs/z120m12 "AFNOR Z120M12") - [Z120M12M Indicative](/materials/afnor/z120m12m "AFNOR Z120M12M") - [Z120Mn12 Indicative](/materials/afnor/z120mn12 "AFNOR Z120Mn12") UNE Spain · 7 - [120 Indicative](/materials/une/120 "UNE 120") - [AM-X-120Mn12 Indicative](/materials/une/am-x-120mn12 "UNE AM-X-120Mn12") - [F.240 Indicative](/materials/une/f-240 "UNE F.240") - [F.8251 Indicative](/materials/une/f-8251 "UNE F.8251") - [F.82551-AM-X Indicative](/materials/une/f-82551-am-x "UNE F.82551-AM-X") - [Mn12 Indicative](/materials/une/mn12 "UNE Mn12") - [X120Mn12 Indicative](/materials/din-en/x120mn12 "UNE X120Mn12") JIS Japan · 5 - [SCMnH Indicative](/materials/jis/scmnh "JIS SCMnH") - [SCMnH1 Indicative](/materials/jis/scmnh1 "JIS SCMnH1") - [SCMnH11 Indicative](/materials/jis/scmnh11 "JIS SCMnH11") - [SCMnH2 Indicative](/materials/jis/scmnh2 "JIS SCMnH2") - [SCMnH3 Indicative](/materials/jis/scmnh3 "JIS SCMnH3") GB China · 4 - [ZGMn13-1 Indicative](/materials/gb/zgmn13-1 "GB ZGMn13-1") - [ZGMn13-1-4 Indicative](/materials/gb/zgmn13-1-4 "GB ZGMn13-1-4") - [ZGMn13-2 Indicative](/materials/gb/zgmn13-2 "GB ZGMn13-2") - [ZGMn13-3 Indicative](/materials/gb/zgmn13-3 "GB ZGMn13-3") GOST Russia / CIS · 5 - [110G13L Indicative](/materials/gost/110g13l "GOST 110G13L") - [110Г13Л Indicative](/materials/gost/110g13l "GOST 110Г13Л") - [120G13 Indicative](/materials/gost/120g13 "GOST 120G13") - [El256 Indicative](/materials/gost/el256 "GOST El256") - [G13 Indicative](/materials/gost/g13 "GOST G13") UNI Italy · 2 - [GX120Mn12 Indicative](/materials/din-en/gx120mn12 "UNI GX120Mn12") - [XG120Mn12 Indicative](/materials/uni/xg120mn12 "UNI XG120Mn12") SS Sweden · 1 - [2183 Indicative](/materials/ss/2183 "SS 2183") ČSN Czechia · 2 - **17618 Indicative** - [422920 Indicative](/materials/csn/422920 "ČSN 422920") STN Slovakia · 1 - **17 618 Indicative** SRPS Serbia · 1 - [Č.3160 Indicative](/materials/srps/c-3160 "SRPS Č.3160") PN Poland · 2 - [C120G13 Indicative](/materials/pn/c120g13 "PN C120G13") - [L120G13 Indicative](/materials/pn/l120g13 "PN L120G13") MSZ Hungary · 1 - [X120Mn13 Indicative](/materials/msz/x120mn13 "MSZ X120Mn13") STAS Romania · 2 - [T105Mn120 Indicative](/materials/stas/t105mn120 "STAS T105Mn120") - [T130Mn135 Indicative](/materials/stas/t130mn135 "STAS T130Mn135") ÖNORM Austria · 1 - [BOHLERK700 Indicative](/materials/onorm/bohlerk700 "ÖNORM BOHLERK700") SFS Finland · 1 - [G-X120Mn13 Indicative](/materials/din-en/g-x120mn13 "SFS G-X120Mn13") KS South Korea · 1 - [SCMnH1 Indicative](/materials/jis/scmnh1 "KS SCMnH1") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn Cr C Iron — the balance, never listed by a standard — 84.3 % Mn — 12.5 % Cr — 1.5 % C — 1.2 % Traces & impurities · 0.5 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1.1–1.3 — Unusual | | Si | 0.3–0.5 | | Mn | 12–13 — Unusual | | P | 0.1 — Unusual | | S | 0.04 | | Cr | ≤ 1.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 1,10-1,30 | 1.100 | 1.300 | Range | | Si | 0,30-0,50 | 0.300 | 0.500 | Range | | P | 0,1 | 0.100 | 0.100 | Exact | | S | 0,04 | 0.040 | 0.040 | Exact | | Cr | ≤1,50 | — | 1.500 | Max | | Mn | 12,0-13,0 | 12.000 | 13.000 | 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, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact Weldability not suitable for welding As published: is not used. Flake sensitivity not susceptible As published: not 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 1 conditions · 4 values By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | Casting, GOST 21357-87 | 800 | 400 | 25 | 35 | 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. ## 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=9a7a1f1b-1e27-4cb5-8f71-260f6152d4ad&designation=a4cca3d0-c98c-4954-b061-0a477ca44657 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/17618.pdf "Datasheet as PDF")