--- title: "1.7707 — Quenched and tempered steels" description: "1.7707 is the material number of the grade also listed as 30CrMoV9. Category: Quenched and tempered steels. Designations recorded for this grade: 19." canonical: https://steelequivalents.com/materials/material-no/1.7707 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.7707.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.7707.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.7707.md es: https://steelequivalents.com/es/materiales/número-de-material/1.7707.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.7707.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.7707.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.7707.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.7707.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.7707.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.7707.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.7707.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.7707.md zh: https://steelequivalents.com/zh/材料/材料编号/1.7707.md ja: https://steelequivalents.com/ja/材料/材料番号/1.7707.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.7707.md ko: https://steelequivalents.com/ko/재료/재료번호/1.7707.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.7707.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.7707.md content_hash: sha256:6293d3ad477a0d81b113873f10a1ff78c3be9992964ce9e22adcac961578a048 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/1.7707 > Canonical URL: https://steelequivalents.com/materials/material-no/1.7707 > 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 · 19 designations # 1.7707 1.7707 is the material number of the grade also listed as 30CrMoV9. It is a material in the category Quenched and tempered steels. We list 19 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, SAE AMS, GOST, ČSN, PN and SRPS. - ***Material no.* **1.7707**** - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **19** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=483615bb-5776-4562-867a-d685745f0448 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.7707.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 30CrMoV9 This grade’s own name](/materials/din-en/30crmov9 "DIN / EN 30CrMoV9") ## 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 19 designations · 9 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 - [30CrMoV9 This grade’s own name](/materials/din-en/30crmov9 "DIN / EN 30CrMoV9") UNS United States · 1 - [G43406 Indicative](/materials/uns/g43406 "UNS G43406") AISI / SAE United States · 2 - [4340 Indicative](/materials/aisi-sae/4340 "AISI / SAE 4340") - [E4340 Indicative](/materials/aisi-sae/e4340 "AISI / SAE E4340") ASTM United States · 2 - [A322 Indicative](/materials/astm/a322 "ASTM A322") - [A331 Indicative](/materials/astm/a331 "ASTM A331") SAE AMS United States / Aerospace · 5 - [6359 Indicative plate sheet strip](/materials/ams/6359 "SAE AMS 6359") - [6409 Indicative bar forging](/materials/ams/6409 "SAE AMS 6409") - [6414 Indicative bar forging](/materials/ams/6414 "SAE AMS 6414") - [6415 Indicative bar forging](/materials/ams/6415 "SAE AMS 6415") - [6484 Indicative bar forging](/materials/ams/6484 "SAE AMS 6484") GOST Russia / CIS · 3 - [30Ch3MF Indicative](/materials/gost/30ch3mf "GOST 30Ch3MF") - [30KH3MF Indicative](/materials/gost/30kh3mf "GOST 30KH3MF") - [30Х3МФ Indicative](/materials/gost/30kh3mf "GOST 30Х3МФ") ČSN Czechia · 2 - [15241 Indicative](/materials/csn/15241 "ČSN 15241") - [15330 Indicative](/materials/csn/15330 "ČSN 15330") PN Poland · 2 - [30H2MF Indicative](/materials/pn/30h2mf "PN 30H2MF") - [33H3MF Indicative](/materials/pn/33h3mf "PN 33H3MF") SRPS Serbia · 1 - [Č.4734 Indicative](/materials/srps/c-4734 "SRPS Č.4734") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Ni Mn Iron — the balance, never listed by a standard — 95.2 % Cr — 2.5 % Ni — 0.6 % Mn — 0.6 % Traces & impurities · 1.1 % 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 | 0.4–0.7 | | P | 0.035 | | S | 0.035 | | Cr | 2.3–2.7 — Unusual | | Mo | 0.15–0.25 | | Ni | 0.6 | | V | 0.1–0.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium 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 | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | V | 0,10-0,20 | 0.100 | 0.200 | Range | | Cr | 2,30-2,70 | 2.300 | 2.700 | Range | | Mn | 0,40-0,70 | 0.400 | 0.700 | Range | | Ni | 0,6 | 0.600 | 0.600 | Exact | | Mo | 0,15-0,25 | 0.150 | 0.250 | 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 computed from composition · °C Predicted Ae3 786 °C Predicted Ae1 776 °C Predicted Acm 610 °C Predicted Bs 482 °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 7,73 g/cm³ Exact Flake sensitivity susceptible As published: predisposed Temper brittleness 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 3 conditions · 10 values By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | ≤ 160 | 900 | 12 | | 160 – 330 | 800 | 14 | By dimension**Quenching 870°C, oil, Drawing 620°C, water** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Ø 25 | 980 | 835 | 12 | 55 | 980 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 4543-71 | 229 | 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=483615bb-5776-4562-867a-d685745f0448 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.7707.pdf "Datasheet as PDF")