--- title: "Q355GNH — composition, equivalents and standards" description: "Q355GNH: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/q355gnh language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/q355gnh.md cs: https://steelequivalents.com/cs/materiály/gb/q355gnh.md de: https://steelequivalents.com/de/werkstoffe/gb/q355gnh.md es: https://steelequivalents.com/es/materiales/gb/q355gnh.md fr: https://steelequivalents.com/fr/matériaux/gb/q355gnh.md hu: https://steelequivalents.com/hu/anyagok/gb/q355gnh.md it: https://steelequivalents.com/it/materiali/gb/q355gnh.md nl: https://steelequivalents.com/nl/materialen/gb/q355gnh.md pl: https://steelequivalents.com/pl/materiały/gb/q355gnh.md pt: https://steelequivalents.com/pt/materiais/gb/q355gnh.md ru: https://steelequivalents.com/ru/материалы/gb/q355gnh.md tr: https://steelequivalents.com/tr/malzemeler/gb/q355gnh.md zh: https://steelequivalents.com/zh/材料/gb/q355gnh.md ja: https://steelequivalents.com/ja/材料/gb/q355gnh.md ar: https://steelequivalents.com/ar/المواد/gb/q355gnh.md ko: https://steelequivalents.com/ko/재료/gb/q355gnh.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/q355gnh.md hi: https://steelequivalents.com/hi/सामग्री/gb/q355gnh.md content_hash: sha256:3adb0f1bc3067a1c4f59977aea4fd98ab644684b6eff17eab5a75356fc00d0df 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/gb/q355gnh > Canonical URL: https://steelequivalents.com/materials/gb/q355gnh > 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. GB · China · 1 designation # Q355GNH Q355GNH is a grade designated under GB. Its recorded composition includes C ≤ 0.12%, Si 0.25–0.75%, Cr 0.3–1.25%, Mn ≤ 1% and Ni ≤ 0.65%. No cross-standard equivalents are recorded for this grade yet. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=56bfd5ef-4ad5-4bf6-9e6a-f07136bd8a5a&designation=7db4495c-cf9f-420f-9ea2-e06b529c211a "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/q355gnh.pdf "Datasheet as PDF") ## Chemical composition 8 elements on file · weight % What this alloy is Fe Mn Cr Ni Iron — the balance, never listed by a standard — 96.4 % Mn — 1 % Cr — 0.8 % Ni — 0.7 % Traces & impurities · 1.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.12 | | Si | 0.25–0.75 | | Mn | ≤ 1 | | P | 0.07–0.15 — Unusual | | S | ≤ 0.02 | | Cr | 0.3–1.25 | | Ni | ≤ 0.65 | | Cu | 0.25–0.55 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel Copper 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 | — | 0.120 | Max | | Si | 0.25-0.75 | 0.250 | 0.750 | Range | | P | 0.07-0.15 | 0.070 | 0.150 | Range | | S | ≤0.02 | — | 0.020 | Max | | Cr | 0.3-1.25 | 0.300 | 1.250 | Range | | Mn | ≤1 | — | 1.000 | Max | | Ni | ≤0.65 | — | 0.650 | Max | | Cu | 0.25-0.55 | 0.250 | 0.550 | 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: Mo. ## Physical & mechanical properties 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. ## 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=56bfd5ef-4ad5-4bf6-9e6a-f07136bd8a5a&designation=7db4495c-cf9f-420f-9ea2-e06b529c211a "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/q355gnh.pdf "Datasheet as PDF")