--- title: "30CrMo4 — Low-temperature structural steels" description: "30CrMo4: 24 equivalent designations across 10 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/30crmo4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/30crmo4.md cs: https://steelequivalents.com/cs/materiály/din-en/30crmo4.md de: https://steelequivalents.com/de/werkstoffe/din-en/30crmo4.md es: https://steelequivalents.com/es/materiales/din-en/30crmo4.md fr: https://steelequivalents.com/fr/matériaux/din-en/30crmo4.md hu: https://steelequivalents.com/hu/anyagok/din-en/30crmo4.md it: https://steelequivalents.com/it/materiali/din-en/30crmo4.md nl: https://steelequivalents.com/nl/materialen/din-en/30crmo4.md pl: https://steelequivalents.com/pl/materiały/din-en/30crmo4.md pt: https://steelequivalents.com/pt/materiais/din-en/30crmo4.md ru: https://steelequivalents.com/ru/материалы/din-en/30crmo4.md tr: https://steelequivalents.com/tr/malzemeler/din-en/30crmo4.md zh: https://steelequivalents.com/zh/材料/din-en/30crmo4.md ja: https://steelequivalents.com/ja/材料/din-en/30crmo4.md ar: https://steelequivalents.com/ar/المواد/din-en/30crmo4.md ko: https://steelequivalents.com/ko/재료/din-en/30crmo4.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/30crmo4.md hi: https://steelequivalents.com/hi/सामग्री/din-en/30crmo4.md content_hash: sha256:3cd6b8686a8a6c8dbafa445f20173697b32a6e676ddefb54cedcb90e089f7dc0 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/din-en/30crmo4 > Canonical URL: https://steelequivalents.com/materials/din-en/30crmo4 > 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. DIN / EN · Europe · 24 designations # 30CrMo4 30CrMo4 is a material in the category [Low-temperature structural steels](/categories/low-temperature-structural-steels "Low-temperature structural steels"), held under material number 1.7216. We list 23 designations recorded for this grade, in the standards UNS, AISI / SAE, ASTM, BS, AFNOR, SAE AMS, JIS, GB and GOST. Its recorded composition includes C 0.27–0.34%, Si ≤ 0.35%, Cr 0.8–1.15%, Mn 0.35–0.6% and Mo 0.15–0.3%. Recorded mechanical properties include Rm 700–950 N/mm², ReH 480–750 N/mm², A 12–15% and HB 223; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.7216**](/materials/material-no/1.7216 "Material no.: 1.7216") - [*Category* **Low-temperature structural steels · 55 grades**](/categories/low-temperature-structural-steels "Category: Low-temperature structural steels · 55 grades") - *Designations* **24** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=de039b49-e18f-44cf-8b9c-fc69d3403f4b&designation=23a09a40-e586-45d2-9f0b-71b7a94692c5 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/30crmo4.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS G41300 This grade’s own name · 4 grades on that route](/materials/uns/g41300 "UNS G41300") - [AISI / SAE 4120H This grade’s own name](/materials/aisi-sae/4120h "AISI / SAE 4120H") ## About Low-temperature structural steels Low-temperature structural steels are structural steels designed to retain toughness and reliable load-bearing performance in cold service. Their resistance to brittle fracture at low temperatures makes them suitable for structures, pressure-containing equipment and other components exposed to severe cold. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 24 designations · 10 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 - **30CrMo4 This grade’s own name** UNS United States · 3 - [G41300 This grade’s own name](/materials/uns/g41300 "UNS G41300") - [H41200 This grade’s own name](/materials/uns/h41200 "UNS H41200") - [K13047 This grade’s own name](/materials/uns/k13047 "UNS K13047") AISI / SAE United States · 2 - [4120H This grade’s own name](/materials/aisi-sae/4120h "AISI / SAE 4120H") - [4130 This grade’s own name](/materials/aisi-sae/4130 "AISI / SAE 4130") ASTM United States · 2 - [A322 Indicative](/materials/astm/a322 "ASTM A322") - [A331 Indicative](/materials/astm/a331 "ASTM A331") BS United Kingdom · 1 - [1717COS110 Indicative](/materials/bs/1717cos110 "BS 1717COS110") AFNOR France · 1 - [30CD4 Indicative](/materials/afnor/30cd4 "AFNOR 30CD4") SAE AMS United States / Aerospace · 10 - [6345 Indicative plate sheet](/materials/ams/6345 "SAE AMS 6345") - [6346 Indicative bar](/materials/ams/6346 "SAE AMS 6346") - [6348 Indicative bar](/materials/ams/6348 "SAE AMS 6348") - [6350 Indicative plate sheet](/materials/ams/6350 "SAE AMS 6350") - [6351 Indicative plate sheet](/materials/ams/6351 "SAE AMS 6351") - [6360 Indicative](/materials/ams/6360 "SAE AMS 6360") - [6361 Indicative](/materials/ams/6361 "SAE AMS 6361") - [6370 Indicative bar](/materials/ams/6370 "SAE AMS 6370") - [6371 Indicative tube](/materials/ams/6371 "SAE AMS 6371") - [6374 Indicative](/materials/ams/6374 "SAE AMS 6374") JIS Japan · 2 - [SCM420 Indicative](/materials/ks/scm420 "JIS SCM420") - [SCM430 Indicative](/materials/ks/scm430 "JIS SCM430") GB China · 1 - [30CrMo Indicative](/materials/gb/30crmo "GB 30CrMo") GOST Russia / CIS · 1 - [30XM Indicative](/materials/gost/30xm "GOST 30XM") 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 — 97.6 % Cr — 1 % Mn — 0.5 % Si — 0.4 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.27–0.34 — Unusual | | Si | ≤ 0.35 | | Mn | 0.35–0.6 | | P | 0.035 | | S | 0.035 | | Cr | 0.8–1.15 | | 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 | 0,27-0,34 | 0.270 | 0.340 | Range | | Si | ≤0,35 | — | 0.350 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,80-1,15 | 0.800 | 1.150 | Range | | Mn | 0,35-0,60 | 0.350 | 0.600 | 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 7,85 g/cm³ Exact 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 · 13 values By thickness**Quenched and tempered** source `steelnumber` | Thickness mm | ReH N/mm² | Rm N/mm² | A% | |---|---|---|---| | ≤ 8 | 750 | 950 | 12 | | 8 – 20 | 630 | 850 | 13 | | 20 – 50 | 520 | 750 | 14 | | 50 – 80 | 480 | 700 | 15 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 223 | 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. [26CrMo4-2 1.7219 Cr 0,90-1,20 · Mn 0,50-0,80 - ΔCr 0.08 - ΔMn 0.18 - 3 designations](/materials/din-en/26crmo4-2 "26CrMo4-2") ## 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=de039b49-e18f-44cf-8b9c-fc69d3403f4b&designation=23a09a40-e586-45d2-9f0b-71b7a94692c5 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/30crmo4.pdf "Datasheet as PDF")