--- title: "16430ŽH — Quenched and tempered steels" description: "16430ŽH in ČSN: material number 1.6580, also listed as 30CrNiMo8. Category: Quenched and tempered steels. Designations recorded for this grade: 29." canonical: https://steelequivalents.com/materials/csn/16430zh language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/16430zh.md cs: https://steelequivalents.com/cs/materiály/csn/16430zh.md de: https://steelequivalents.com/de/werkstoffe/csn/16430zh.md es: https://steelequivalents.com/es/materiales/csn/16430zh.md fr: https://steelequivalents.com/fr/matériaux/csn/16430zh.md hu: https://steelequivalents.com/hu/anyagok/csn/16430zh.md it: https://steelequivalents.com/it/materiali/csn/16430zh.md nl: https://steelequivalents.com/nl/materialen/csn/16430zh.md pl: https://steelequivalents.com/pl/materiały/csn/16430zh.md pt: https://steelequivalents.com/pt/materiais/csn/16430zh.md ru: https://steelequivalents.com/ru/материалы/csn/16430zh.md tr: https://steelequivalents.com/tr/malzemeler/csn/16430zh.md zh: https://steelequivalents.com/zh/材料/csn/16430zh.md ja: https://steelequivalents.com/ja/材料/csn/16430zh.md ar: https://steelequivalents.com/ar/المواد/csn/16430zh.md ko: https://steelequivalents.com/ko/재료/csn/16430zh.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/16430zh.md hi: https://steelequivalents.com/hi/सामग्री/csn/16430zh.md content_hash: sha256:c2bfe71078d0b99fb89d1ade34e120dc8c74d2766e5c4fbb104bb23e19b34465 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/16430zh > Canonical URL: https://steelequivalents.com/materials/csn/16430zh > 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 · 29 designations # 16430ŽH 16430ŽH is a designation in ČSN for the material held under material number 1.6580, also listed as 30CrNiMo8. It is a material in the category Quenched and tempered steels. We list 29 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, ISO, SAE AMS, JIS, GB, GOST, ČSN, PN, SRPS, HRN and MSZ. - [*Material no.* **1.6580**](/materials/material-no/1.6580 "Material no.: 1.6580") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **29** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=73d49016-1d36-4404-8390-d682134947fe&designation=e178d389-c476-4c7b-8c94-fbb9d93df091 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/16430zh.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 30CrNiMo8 This grade’s own name](/materials/din-en/30crnimo8 "DIN / EN 30CrNiMo8") - [BS 823M40 This grade’s own name](/materials/bs/823m40 "BS 823M40") - [AFNOR 30NCD8 This grade’s own name](/materials/afnor/30ncd8 "AFNOR 30NCD8") ## 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 29 designations · 16 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 · 1 - [30CrNiMo8 This grade’s own name](/materials/din-en/30crnimo8 "DIN / EN 30CrNiMo8") UNS United States · 1 - [G43400 Indicative](/materials/uns/g43400 "UNS G43400") AISI / SAE United States · 1 - [4340 Indicative](/materials/aisi-sae/4340 "AISI / SAE 4340") ASTM United States · 1 - [A829 Indicative](/materials/astm/a829 "ASTM A829") BS United Kingdom · 2 - [823M30 Indicative](/materials/bs/823m30 "BS 823M30") - [823M40 This grade’s own name](/materials/bs/823m40 "BS 823M40") AFNOR France · 2 - [30CND8 Indicative](/materials/afnor/30cnd8 "AFNOR 30CND8") - [30NCD8 This grade’s own name](/materials/afnor/30ncd8 "AFNOR 30NCD8") ISO International · 1 - [31CrNiMo8 Indicative](/materials/din-en/31crnimo8 "ISO 31CrNiMo8") SAE AMS United States / Aerospace · 5 - [6359 Indicative](/materials/ams/6359 "SAE AMS 6359") - [6409 Indicative](/materials/ams/6409 "SAE AMS 6409") - [6414 Indicative](/materials/ams/6414 "SAE AMS 6414") - [6415 Indicative](/materials/ams/6415 "SAE AMS 6415") - [6454 Indicative](/materials/ams/6454 "SAE AMS 6454") JIS Japan · 2 - [SNCM431 Indicative](/materials/jis/sncm431 "JIS SNCM431") - [SNCM439 Indicative](/materials/ks/sncm439 "JIS SNCM439") GB China · 1 - [30Cr2Ni2Mo Indicative](/materials/gb/30cr2ni2mo "GB 30Cr2Ni2Mo") GOST Russia / CIS · 4 - [30KHN2MА Indicative](/materials/gost/30khn2ma "GOST 30KHN2MА") - [30ХН2МА Indicative](/materials/gost/30khn2ma "GOST 30ХН2МА") - [30ХНМА Indicative](/materials/gost/30khnma "GOST 30ХНМА") - [3KH3M3F Indicative](/materials/gost/3kh3m3f "GOST 3KH3M3F") ČSN Czechia · 3 - [16430VN Indicative](/materials/csn/16430vn "ČSN 16430VN") - **16430ŽH Indicative** - [16435 Indicative](/materials/csn/16435 "ČSN 16435") PN Poland · 2 - [30H2N2A Indicative](/materials/pn/30h2n2a "PN 30H2N2A") - [30H2N2M Indicative](/materials/pn/30h2n2m "PN 30H2N2M") SRPS Serbia · 1 - [Č.5432 Indicative](/materials/srps/c-5432 "SRPS Č.5432") HRN Croatia · 1 - [Č.5432 Indicative](/materials/srps/c-5432 "HRN Č.5432") MSZ Hungary · 1 - [NCMo 6 Indicative](/materials/msz/ncmo-6 "MSZ NCMo 6") 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 Cr Ni Mn Iron — the balance, never listed by a standard — 94.4 % Cr — 2 % Ni — 2 % Mn — 0.4 % Traces & impurities · 1.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.26–0.34 | | Si | ≤ 0.4 | | Mn | 0.3–0.6 | | P | 0.025 | | S | 0.035 | | Cr | 1.8–2.2 — Unusual | | Mo | 0.3–0.5 | | Ni | 1.8–2.2 | 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 | 0,26-0,34 | 0.260 | 0.340 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 1,80-2,20 | 1.800 | 2.200 | Range | | Mn | 0,30-0,60 | 0.300 | 0.600 | Range | | Ni | 1,80-2,20 | 1.800 | 2.200 | Range | | Mo | 0,30-0,50 | 0.300 | 0.500 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## Physical & mechanical properties Density 7,76 g/cm³ Exact Transformation point Ac1 730 °C Exact Transformation point Ac3 775 °C Exact · Ac3(Acm) Flake sensitivity susceptible As published: 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 · 19 values By thickness**Quenched and tempered · round products** source `steelnumber` | Thickness mm | A% · Lo = 5,65 √So | |---|---| | ≤ 16 | 9 | | 16 – 40 | 9 | | 40 – 100 | 10 | | 100 – 160 | 11 | | 160 – 250 | 12 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 248 – 255 | By dimension**Quenching and drawing** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Ø 15 | 980 | 785 | 10 | 45 | 780 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | 30KHN2MА ( 30ХН2МА ) (annealing) , GOST 4543-71 | 241 | At temperature**no delivery state stated** source `splav` | Temperature °C | Elastic modulus GPa | |---|---| | 20 | 204 | | 100 | 201 | | 200 | 194 | | 300 | 186 | | 400 | 182 | | 500 | 171 | | 600 | 159 | 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. ## Heat treatment Supply condition - Quenching and Tempering d=25 Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied. Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxMTk3NDY_ "Source: www.caishuku.com") ## 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=73d49016-1d36-4404-8390-d682134947fe&designation=e178d389-c476-4c7b-8c94-fbb9d93df091 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/16430zh.pdf "Datasheet as PDF")