--- title: "T20Mn14 — GS-20 Mn 5, 29 equivalent designations" description: "T20Mn14 in STAS: material number 1.1120, also listed as GS-20 Mn 5. It is a material in the category Others. Designations recorded for this grade: 29." canonical: https://steelequivalents.com/materials/stas/t20mn14 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/stas/t20mn14.md cs: https://steelequivalents.com/cs/materiály/stas/t20mn14.md de: https://steelequivalents.com/de/werkstoffe/stas/t20mn14.md es: https://steelequivalents.com/es/materiales/stas/t20mn14.md fr: https://steelequivalents.com/fr/matériaux/stas/t20mn14.md hu: https://steelequivalents.com/hu/anyagok/stas/t20mn14.md it: https://steelequivalents.com/it/materiali/stas/t20mn14.md nl: https://steelequivalents.com/nl/materialen/stas/t20mn14.md pl: https://steelequivalents.com/pl/materiały/stas/t20mn14.md pt: https://steelequivalents.com/pt/materiais/stas/t20mn14.md ru: https://steelequivalents.com/ru/материалы/stas/t20mn14.md tr: https://steelequivalents.com/tr/malzemeler/stas/t20mn14.md zh: https://steelequivalents.com/zh/材料/stas/t20mn14.md ja: https://steelequivalents.com/ja/材料/stas/t20mn14.md ar: https://steelequivalents.com/ar/المواد/stas/t20mn14.md ko: https://steelequivalents.com/ko/재료/stas/t20mn14.md pt-br: https://steelequivalents.com/pt-br/materiais/stas/t20mn14.md hi: https://steelequivalents.com/hi/सामग्री/stas/t20mn14.md content_hash: sha256:211897196ecab1bf1a56f63ae8ba103e8a75c09e5ee3fcff81856608c707dbab 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/stas/t20mn14 > Canonical URL: https://steelequivalents.com/materials/stas/t20mn14 > 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. STAS · Romania · 29 designations # T20Mn14 T20Mn14 is a designation in STAS for the material held under material number 1.1120, also listed as GS-20 Mn 5. It is a material in the category Others. We list 29 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, JIS, GOST, UNI, ČSN, PN, MSZ, STAS, BDS and ÖNORM. - [*Material no.* **1.1120**](/materials/material-no/1.1120 "Material no.: 1.1120") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **29** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=72d6fd86-b6c3-4df2-804f-072c1aca337c&designation=567b3f33-e7fe-4084-b7b7-6811287218f6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/stas/t20mn14.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN G19Mn5 This grade’s own name](/materials/din-en/g19mn5 "DIN / EN G19Mn5") - [UNS J02505 This grade’s own name · 2 grades on that route](/materials/uns/j02505 "UNS J02505") ## About Others These are miscellaneous metallic alloys that do not fit a more specific material family and may be based on iron, nickel, cobalt, copper or other alloy systems. They are selected for applications requiring particular combinations of strength, hardness, toughness, wear resistance or resistance to demanding service conditions. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 29 designations · 14 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 - [G19Mn5 This grade’s own name](/materials/din-en/g19mn5 "DIN / EN G19Mn5") - [G20Mn5 This grade’s own name](/materials/din-en/g20mn5 "DIN / EN G20Mn5") - [GS-20 Mn 5 This grade’s own name Withdrawn](/materials/din-en/gs-20-mn-5 "DIN / EN GS-20 Mn 5") UNS United States · 1 - [J02505 This grade’s own name](/materials/uns/j02505 "UNS J02505") AISI / SAE United States · 8 - [1035 Indicative](/materials/aisi-sae/1035 "AISI / SAE 1035") - [1037 Indicative](/materials/aisi-sae/1037 "AISI / SAE 1037") - [A352GrLCC Indicative](/materials/aisi-sae/a352grlcc "AISI / SAE A352GrLCC") - [Gr.80-40 Indicative](/materials/aisi-sae/gr-80-40 "AISI / SAE Gr.80-40") - [GrA2Q Indicative](/materials/aisi-sae/gra2q "AISI / SAE GrA2Q") - [GrWCC Indicative](/materials/aisi-sae/grwcc "AISI / SAE GrWCC") - [J02503 Indicative](/materials/uns/j02503 "AISI / SAE J02503") - [J02505 Indicative](/materials/uns/j02505 "AISI / SAE J02505") BS United Kingdom · 1 - [Gr.A Indicative](/materials/aisi-sae/gr-a "BS Gr.A") AFNOR France · 1 - [35M5 Indicative](/materials/afnor/35m5 "AFNOR 35M5") JIS Japan · 3 - [SCA1 Indicative](/materials/jis/sca1 "JIS SCA1") - [SCMn1 Indicative](/materials/jis/scmn1 "JIS SCMn1") - [SCMn2 Indicative](/materials/jis/scmn2 "JIS SCMn2") GOST Russia / CIS · 4 - [20GL Indicative](/materials/gost/20gl "GOST 20GL") - [20ГЛ Indicative](/materials/gost/20gl "GOST 20ГЛ") - [35G Indicative](/materials/gost/35g "GOST 35G") - [35Г Indicative](/materials/gost/35g "GOST 35Г") UNI Italy · 1 - [G22Mn3 Indicative](/materials/uni/g22mn3 "UNI G22Mn3") ČSN Czechia · 2 - [422709 Indicative](/materials/csn/422709 "ČSN 422709") - [422714 Indicative](/materials/csn/422714 "ČSN 422714") PN Poland · 1 - [L20G Indicative](/materials/pn/l20g "PN L20G") MSZ Hungary · 1 - [Ao20Mn6 Indicative](/materials/msz/ao20mn6 "MSZ Ao20Mn6") STAS Romania · 1 - **T20Mn14 Indicative** BDS Bulgaria · 1 - [20L Indicative](/materials/gost/20l "BDS 20L") ÖNORM Austria · 1 - [GS21Mn5 Indicative](/materials/din-en/gs21mn5 "ÖNORM GS21Mn5") 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 Ni Iron — the balance, never listed by a standard — 97.1 % Mn — 1.3 % Si — 0.6 % Ni — 0.4 % Traces & impurities · 0.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.17–0.23 | | Si | ≤ 0.6 | | Mn | 1–1.5 | | P | 0.02 | | S | 0.015 | | Cr | ≤ 0.3 | | Mo | ≤ 0.15 | | 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 | 0,17-0,23 | 0.170 | 0.230 | Range | | Si | ≤0,60 | — | 0.600 | Max | | P | 0,02 | 0.020 | 0.020 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | 1,00-1,50 | 1.000 | 1.500 | Range | | Ni | ≤0,40 | — | 0.400 | Max | | Mo | ≤0,15 | — | 0.150 | 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 811 °C Predicted Ae1 716 °C Predicted Acm 463 °C Predicted Bs 549 °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 Flake sensitivity slightly susceptible As published: weakly predisposed Temper brittleness slightly susceptible As published: weakly 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 2 conditions · 6 values By dimension**Quenching 860°C, water, Drawing 600°C, air** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Ø 25 | 570 | 340 | 18 | 45 | 700 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 4543-71 | 207 | 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. [WStE 355 S 1.1337 Mn 0,90-1,65 · Si 0,10-0,50 - ΔMn 0.02 - ΔSi 0.00 - 1 designations](/materials/din-en/wste-355-s "WStE 355 S")[G21Mn5 1.1138 Mn 1,10-1,30 · Si ≤0,60 - ΔMn 0.05 - ΔSi 0.00 - 3 designations](/materials/din-en/g21mn5 "G21Mn5")[46Mn5 1.1128 Mn 1,15-1,35 · Si 0,25-0,45 - ΔMn 0.00 - ΔSi 0.05 - 1 designations](/materials/din-en/46mn5 "46Mn5")[G17Mn5 1.1131 Mn 1,00-1,60 · Si ≤0,60 - ΔMn 0.05 - ΔSi 0.00 - 8 designations](/materials/din-en/g17mn5 "G17Mn5")[25MnV5 1.1197 Mn 1,00-1,40 · Si 0,15-0,45 - ΔMn 0.05 - ΔSi 0.00 - 1 designations](/materials/din-en/25mnv5 "25MnV5")[G36Mn5 1.1176 Mn 1,20-1,50 · Si 0,15-0,35 - ΔMn 0.10 - ΔSi 0.05 - 1 designations](/materials/din-en/g36mn5 "G36Mn5") ## 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=72d6fd86-b6c3-4df2-804f-072c1aca337c&designation=567b3f33-e7fe-4084-b7b7-6811287218f6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/stas/t20mn14.pdf "Datasheet as PDF")