--- title: "25ChM — Quenched and tempered steels" description: "25ChM in GOST: material number 1.7218, also listed as 25CrMo4. Category: Quenched and tempered steels. Designations recorded for this grade: 111." canonical: https://steelequivalents.com/materials/gost/25chm language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/25chm.md cs: https://steelequivalents.com/cs/materiály/gost/25chm.md de: https://steelequivalents.com/de/werkstoffe/gost/25chm.md es: https://steelequivalents.com/es/materiales/gost/25chm.md fr: https://steelequivalents.com/fr/matériaux/gost/25chm.md hu: https://steelequivalents.com/hu/anyagok/gost/25chm.md it: https://steelequivalents.com/it/materiali/gost/25chm.md nl: https://steelequivalents.com/nl/materialen/gost/25chm.md pl: https://steelequivalents.com/pl/materiały/gost/25chm.md pt: https://steelequivalents.com/pt/materiais/gost/25chm.md ru: https://steelequivalents.com/ru/материалы/gost/25chm.md tr: https://steelequivalents.com/tr/malzemeler/gost/25chm.md zh: https://steelequivalents.com/zh/材料/gost/25chm.md ja: https://steelequivalents.com/ja/材料/gost/25chm.md ar: https://steelequivalents.com/ar/المواد/gost/25chm.md ko: https://steelequivalents.com/ko/재료/gost/25chm.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/25chm.md hi: https://steelequivalents.com/hi/सामग्री/gost/25chm.md content_hash: sha256:535a0779d935706925c85dd4c6c7d67a62f43e9ac7d1c304bd55d5474982eed1 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/gost/25chm > Canonical URL: https://steelequivalents.com/materials/gost/25chm > 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. GOST · Russia / CIS · 111 designations # 25ChM 25ChM is a designation in GOST for the material held under material number 1.7218, also listed as 25CrMo4. It is a material in the category Quenched and tempered steels. We list 111 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, STN, PN, COPANT, SRPS, MSZ, STAS, AS / NZS, BDS, ÖNORM, NBN, SFS and KS. - [*Material no.* **1.7218**](/materials/material-no/1.7218 "Material no.: 1.7218") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **111** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=24775a4d-11c1-4265-a116-d22417542680&designation=5b2e7beb-f9d5-4560-be8a-2eaef3a6b61d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/25chm.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 25CrMo4 This grade’s own name · 3 grades on that route](/materials/din-en/25crmo4 "DIN / EN 25CrMo4") - [UNS H41300 This grade’s own name](/materials/uns/h41300 "UNS H41300") - [AISI / SAE 4130H This grade’s own name](/materials/aisi-sae/4130h "AISI / SAE 4130H") - [BS S534 This grade’s own name · 2 grades on that route](/materials/bs/s534 "BS S534") - [JIS SCM425 This grade’s own name · 3 grades on that route](/materials/jis/scm425 "JIS SCM425") ## 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 111 designations · 26 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 - [1.7218 Indicative](/materials/material-no/1.7218 "DIN / EN 1.7218") - [25CrMo4 This grade’s own name](/materials/din-en/25crmo4 "DIN / EN 25CrMo4") UNS United States · 2 - [G41300 Indicative](/materials/uns/g41300 "UNS G41300") - [H41300 This grade’s own name](/materials/uns/h41300 "UNS H41300") AISI / SAE United States · 9 - [4118 Indicative](/materials/aisi-sae/4118 "AISI / SAE 4118") - [4130 Indicative](/materials/aisi-sae/4130 "AISI / SAE 4130") - [4130H This grade’s own name](/materials/aisi-sae/4130h "AISI / SAE 4130H") - [4130RH This grade’s own name](/materials/aisi-sae/4130rh "AISI / SAE 4130RH") - [G41300 Indicative](/materials/uns/g41300 "AISI / SAE G41300") - [G41350 Indicative](/materials/uns/g41350 "AISI / SAE G41350") - [H41300 Indicative](/materials/uns/h41300 "AISI / SAE H41300") - [H41350 Indicative](/materials/uns/h41350 "AISI / SAE H41350") - [SAE4130 Indicative](/materials/aisi-sae/sae4130 "AISI / SAE SAE4130") ASTM United States · 2 - [4125 Indicative](/materials/astm/4125 "ASTM 4125") - [A519 Gr4130 Indicative](/materials/astm/a519-gr4130 "ASTM A519 Gr4130") BS United Kingdom · 9 - [1717CDS110 Indicative](/materials/bs/1717cds110 "BS 1717CDS110") - [25CrMo4 Indicative](/materials/din-en/25crmo4 "BS 25CrMo4") - [708A25 Indicative](/materials/bs/708a25 "BS 708A25") - [708H20 Indicative](/materials/bs/708h20 "BS 708H20") - [708M20 Indicative](/materials/bs/708m20 "BS 708M20") - [708M25 Indicative](/materials/bs/708m25 "BS 708M25") - [CFS10 Indicative](/materials/bs/cfs10 "BS CFS10") - [En20A Indicative](/materials/bs/en20a "BS En20A") - [S534 This grade’s own name](/materials/bs/s534 "BS S534") AFNOR France · 9 - [18CrMo4 Indicative](/materials/din-en/18crmo4 "AFNOR 18CrMo4") - [25 CD 4 (S) Indicative](/materials/afnor/25cd4s "AFNOR 25 CD 4 (S)") - [25CD4 Indicative](/materials/afnor/25cd4 "AFNOR 25CD4") - [25CD4FF Indicative](/materials/afnor/25cd4ff "AFNOR 25CD4FF") - [25CrMo4 Indicative](/materials/din-en/25crmo4 "AFNOR 25CrMo4") - [34CD4 Indicative](/materials/afnor/34cd4 "AFNOR 34CD4") - [34CD4FF Indicative](/materials/afnor/34cd4ff "AFNOR 34CD4FF") - [34CrMo4 Indicative](/materials/din-en/34crmo4 "AFNOR 34CrMo4") - [34CrMo4RR Indicative](/materials/afnor/34crmo4rr "AFNOR 34CrMo4RR") UNE Spain · 12 - [25CrMo4 Indicative](/materials/din-en/25crmo4 "UNE 25CrMo4") - [26CrMo4 Indicative](/materials/din-en/26crmo4 "UNE 26CrMo4") - [30CrMo4-1 Indicative](/materials/une/30crmo4-1 "UNE 30CrMo4-1") - [55Cr3 Indicative](/materials/din-en/55cr3 "UNE 55Cr3") - [AM25CrMo4 Indicative](/materials/une/am25crmo4 "UNE AM25CrMo4") - [AM26CrMo4 Indicative](/materials/une/am26crmo4 "UNE AM26CrMo4") - [F.1256 Indicative](/materials/une/f-1256 "UNE F.1256") - [F.222 Indicative](/materials/une/f-222 "UNE F.222") - [F.8330 Indicative](/materials/une/f-8330 "UNE F.8330") - [F.8330-AM25CrMo4 Indicative](/materials/une/f-8330-am25crmo4 "UNE F.8330-AM25CrMo4") - [F.8372 Indicative](/materials/une/f-8372 "UNE F.8372") - [F.8830 Indicative](/materials/une/f-8830 "UNE F.8830") ISO International · 3 - [20CrMo4 Indicative](/materials/din-en/20crmo4 "ISO 20CrMo4") - [25CrMo4 Indicative](/materials/din-en/25crmo4 "ISO 25CrMo4") - [3567 Indicative](/materials/iso/3567 "ISO 3567") JIS Japan · 9 - [SCCrM1 Indicative](/materials/jis/sccrm1 "JIS SCCrM1") - [SCM 2 Indicative](/materials/jis/scm2 "JIS SCM 2") - [SCM418 Indicative](/materials/jis/scm418 "JIS SCM418") - [SCM420 Indicative](/materials/ks/scm420 "JIS SCM420") - [SCM420H Indicative](/materials/jis/scm420h "JIS SCM420H") - [SCM425 This grade’s own name](/materials/jis/scm425 "JIS SCM425") - [SCM430 Indicative](/materials/ks/scm430 "JIS SCM430") - [SCM432 Indicative](/materials/ks/scm432 "JIS SCM432") - [SCM822H Indicative](/materials/jis/scm822h "JIS SCM822H") GB China · 5 - [25CrMo Indicative](/materials/gb/25crmo "GB 25CrMo") - [30CrMn Indicative](/materials/gb/30crmn "GB 30CrMn") - [30CrMo Indicative](/materials/gb/30crmo "GB 30CrMo") - [ML30CrMo Indicative](/materials/gb/ml30crmo "GB ML30CrMo") - [ML30CrMoA Indicative](/materials/gb/ml30crmoa "GB ML30CrMoA") GOST Russia / CIS · 9 - [20ChM Indicative](/materials/bds/20chm "GOST 20ChM") - [20KHM Indicative](/materials/gost/20khm "GOST 20KHM") - [20ХМ Indicative](/materials/gost/20khm "GOST 20ХМ") - **25ChM Indicative** - [30KHM Indicative](/materials/gost/30khm "GOST 30KHM") - [30KHMA Indicative](/materials/gost/30khma "GOST 30KHMA") - [30XM Indicative](/materials/gost/30xm "GOST 30XM") - [30ХМА Indicative](/materials/gost/30khma "GOST 30ХМА") - [ст.30XM Indicative](/materials/gost/st-30xm "GOST ст.30XM") UNI Italy · 7 - [18CrMo4 Indicative](/materials/din-en/18crmo4 "UNI 18CrMo4") - [25CrMo4 Indicative](/materials/din-en/25crmo4 "UNI 25CrMo4") - [25CrMo4KB Indicative](/materials/uni/25crmo4kb "UNI 25CrMo4KB") - [30CrMo4 Indicative](/materials/din-en/30crmo4 "UNI 30CrMo4") - [34CrMo4 Indicative](/materials/din-en/34crmo4 "UNI 34CrMo4") - [35CrMo4 Indicative](/materials/din-en/35crmo4 "UNI 35CrMo4") - [KB Indicative](/materials/uni/kb "UNI KB") SS Sweden · 4 - [2225 Indicative](/materials/ss/2225 "SS 2225") - [2233 Indicative](/materials/ss/2233 "SS 2233") - [2234 Indicative](/materials/ss/2234 "SS 2234") - [SIS 2225 This grade’s own name](/materials/ss/sis-2225 "SS SIS 2225") ČSN Czechia · 2 - [15124 Indicative](/materials/csn/15124 "ČSN 15124") - [15130 Indicative](/materials/csn/15130 "ČSN 15130") STN Slovakia · 1 - [15 130 Indicative](/materials/csn/15130 "STN 15 130") PN Poland · 4 - [18HGM Indicative](/materials/pn/18hgm "PN 18HGM") - [20HM Indicative](/materials/pn/20hm "PN 20HM") - [25HM Indicative](/materials/pn/25hm "PN 25HM") - [L25HM Indicative](/materials/pn/l25hm "PN L25HM") COPANT Latin America · 1 - [4130 Indicative](/materials/aisi-sae/4130 "COPANT 4130") SRPS Serbia · 1 - [Č.4730 Indicative](/materials/srps/c-4730 "SRPS Č.4730") MSZ Hungary · 3 - [25CrMo4 Indicative](/materials/din-en/25crmo4 "MSZ 25CrMo4") - [CMo 1 Indicative](/materials/msz/cmo-1 "MSZ CMo 1") - [MCrMo Indicative](/materials/msz/mcrmo "MSZ MCrMo") STAS Romania · 2 - [26MoCr11 Indicative](/materials/stas/26mocr11 "STAS 26MoCr11") - [T30CrMo3 Indicative](/materials/stas/t30crmo3 "STAS T30CrMo3") AS / NZS Australia / New Zealand · 2 - [4130 Indicative](/materials/aisi-sae/4130 "AS / NZS 4130") - [4130H Indicative](/materials/aisi-sae/4130h "AS / NZS 4130H") BDS Bulgaria · 3 - [20ChM Indicative](/materials/bds/20chm "BDS 20ChM") - [25ChML Indicative](/materials/bds/25chml "BDS 25ChML") - [25CrMo4 Indicative](/materials/din-en/25crmo4 "BDS 25CrMo4") ÖNORM Austria · 3 - [25CrMo5S Indicative](/materials/onorm/25crmo5s "ÖNORM 25CrMo5S") - [BOHLERV330 Indicative](/materials/onorm/bohlerv330 "ÖNORM BOHLERV330") - [BOHLERV340 Indicative](/materials/onorm/bohlerv340 "ÖNORM BOHLERV340") NBN Belgium · 1 - [25CrMo4 Indicative](/materials/din-en/25crmo4 "NBN 25CrMo4") SFS Finland · 2 - [25CrMo4 Indicative](/materials/din-en/25crmo4 "SFS 25CrMo4") - [G-25CrMo4 Indicative](/materials/sfs/g-25crmo4 "SFS G-25CrMo4") KS South Korea · 4 - [SCCrM1 Indicative](/materials/jis/sccrm1 "KS SCCrM1") - [SCM420 Indicative](/materials/ks/scm420 "KS SCM420") - [SCM420TK Indicative](/materials/jis/scm420tk "KS SCM420TK") - [SCM430 Indicative](/materials/ks/scm430 "KS SCM430") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr Mn Si Iron — the balance, never listed by a standard — 97.3 % Cr — 1.1 % Mn — 0.8 % Si — 0.4 % Traces & impurities · 0.5 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.22–0.29 | | Si | ≤ 0.4 | | Mn | 0.6–0.9 | | P | 0.025 | | S | 0.035 | | Cr | 0.9–1.2 | | Mo | 0.15–0.3 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 | 0,22-0,29 | 0.220 | 0.290 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,90-1,20 | 0.900 | 1.200 | Range | | Mn | 0,60-0,90 | 0.600 | 0.900 | Range | | Mo | 0,15-0,30 | 0.150 | 0.300 | 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. ## Physical & mechanical properties Density 7,75 g/cm³ Exact Transformation point Ac1 757 °C Exact Transformation point Ac3 807 °C Exact · Ac3(Acm) Transformation point Ar3 763 °C Exact · Ar3(Arcm) Transformation point Ar1 693 °C Exact Weldability weldable with restrictions As published: limited weldability. Flake sensitivity slightly susceptible As published: weakly 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 5 conditions · 45 values By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Bar, GOST 4543-71 | 930 | 735 | 11 | 45 | 780 | By dimension**Annealing 860 - 880°C** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | to 100 | 550 | 300 | 18 | 45 | By dimension**Normalizing 860°C** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | 100 - 150 | 600 | 350 | 16 | 45 | 400 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 4543-71 | 229 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal expansion coefficient 10^-6/K | Thermal conductivity W/(m·K) | Specific heat capacity J/(kg·K) | Electrical resistivity nΩ·m | |---|---|---|---|---|---|---| | 20 | 7.82 | 208 | — | — | — | 270 | | 100 | 7.8 | 207 | 12.3 | 41.9 | 462 | — | | 200 | 7.77 | 204 | 12.6 | 40.7 | — | 334 | | 300 | 7.74 | 197 | 12.9 | 39.6 | — | 425 | | 400 | 7.7 | 188 | 13.9 | 38.4 | — | 524 | | 500 | 7.66 | 175 | 14.4 | — | — | 628 | | 600 | — | 160 | 14.6 | — | — | 757 | 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 1.7, a shared category, and a published range for Cr / Mn 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. [28Cr4 1.7030 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 28 designations](/materials/din-en/28cr4 "28Cr4")[1.7033 1.7033 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 56 designations](/materials/material-no/1.7033 "1.7033")[37Cr4 1.7034 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 104 designations](/materials/din-en/37cr4 "37Cr4")[1.7035 1.7035 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 67 designations](/materials/material-no/1.7035 "1.7035")[34CrS4 1.7037 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 13 designations](/materials/din-en/34crs4 "34CrS4")[37CrS4 1.7038 Cr 0,90-1,20 · Mn 0,60-0,90 - ΔCr 0.00 - ΔMn 0.00 - 10 designations](/materials/din-en/37crs4 "37CrS4") ## 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=24775a4d-11c1-4265-a116-d22417542680&designation=5b2e7beb-f9d5-4560-be8a-2eaef3a6b61d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/25chm.pdf "Datasheet as PDF")