--- title: "1.7281 — Hydrogen resistant steels" description: "1.7281 is the material number of the grade also listed as 16CrMo9-3. Category: Hydrogen resistant steels. Designations recorded for this grade: 1." canonical: https://steelequivalents.com/materials/material-no/1.7281 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.7281.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.7281.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.7281.md es: https://steelequivalents.com/es/materiales/número-de-material/1.7281.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.7281.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.7281.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.7281.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.7281.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.7281.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.7281.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.7281.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.7281.md zh: https://steelequivalents.com/zh/材料/材料编号/1.7281.md ja: https://steelequivalents.com/ja/材料/材料番号/1.7281.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.7281.md ko: https://steelequivalents.com/ko/재료/재료번호/1.7281.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.7281.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.7281.md content_hash: sha256:71b65e2b80481d2bb8e66ecd78ca9794d499494d3aa8098a5a87b462dd61003a 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/1.7281 > Canonical URL: https://steelequivalents.com/materials/material-no/1.7281 > 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 · 1 designation # 1.7281 1.7281 is the material number of the grade also listed as 16CrMo9-3. It is a material in the category Hydrogen resistant steels. We list 1 designations recorded for this grade, in the standards DIN / EN. - ***Material no.* **1.7281**** - [*Category* **Hydrogen resistant steels · 8 grades**](/categories/hydrogen-resistant-steels "Category: Hydrogen resistant steels · 8 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e74c4490-7cb2-4175-85b5-c76d5982d223 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.7281.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 16CrMo9-3 This grade’s own name](/materials/din-en/16crmo9-3 "DIN / EN 16CrMo9-3") ## About Hydrogen resistant steels Hydrogen resistant steels are steels designed to withstand hydrogen-related damage, including hydrogen embrittlement and hydrogen attack. They are used for pressure vessels, piping and process equipment exposed to hydrogen-containing environments, where resistance to hydrogen ingress and loss of toughness is important. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 1 designations · 1 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 - [16CrMo9-3 This grade’s own name](/materials/din-en/16crmo9-3 "DIN / EN 16CrMo9-3") 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 Mo Iron — the balance, never listed by a standard — 96.5 % Cr — 2.3 % Mn — 0.4 % Mo — 0.4 % Traces & impurities · 0.5 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.12–0.2 | | Si | 0.15–0.35 | | Mn | 0.3–0.5 | | P | 0.035 | | S | 0.035 | | Cr | 2–2.5 | | Mo | 0.3–0.4 | 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 | 0,12-0,20 | 0.120 | 0.200 | Range | | Si | 0,15-0,35 | 0.150 | 0.350 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 2,00-2,50 | 2.000 | 2.500 | Range | | Mn | 0,30-0,50 | 0.300 | 0.500 | Range | | Mo | 0,30-0,40 | 0.300 | 0.400 | 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. ## 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. [24CrMo10 1.7273 Cr 2,30-2,60 · Mn 0,50-0,80 - ΔCr 0.20 - ΔMn 0.25 - 1 designations](/materials/din-en/24crmo10 "24CrMo10") ## 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=e74c4490-7cb2-4175-85b5-c76d5982d223 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.7281.pdf "Datasheet as PDF")