--- title: "HP325 — composition, equivalents and standards" description: "HP325: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gb/hp325 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gb/hp325.md cs: https://steelequivalents.com/cs/materiály/gb/hp325.md de: https://steelequivalents.com/de/werkstoffe/gb/hp325.md es: https://steelequivalents.com/es/materiales/gb/hp325.md fr: https://steelequivalents.com/fr/matériaux/gb/hp325.md hu: https://steelequivalents.com/hu/anyagok/gb/hp325.md it: https://steelequivalents.com/it/materiali/gb/hp325.md nl: https://steelequivalents.com/nl/materialen/gb/hp325.md pl: https://steelequivalents.com/pl/materiały/gb/hp325.md pt: https://steelequivalents.com/pt/materiais/gb/hp325.md ru: https://steelequivalents.com/ru/материалы/gb/hp325.md tr: https://steelequivalents.com/tr/malzemeler/gb/hp325.md zh: https://steelequivalents.com/zh/材料/gb/hp325.md ja: https://steelequivalents.com/ja/材料/gb/hp325.md ar: https://steelequivalents.com/ar/المواد/gb/hp325.md ko: https://steelequivalents.com/ko/재료/gb/hp325.md pt-br: https://steelequivalents.com/pt-br/materiais/gb/hp325.md hi: https://steelequivalents.com/hi/सामग्री/gb/hp325.md content_hash: sha256:047ca4fe9149eb5fc8cb6ec6e8f2dc24590d48afa5c95d88effe89a72a4fd9c7 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/hp325 > Canonical URL: https://steelequivalents.com/materials/gb/hp325 > 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 # HP325 HP325 is a grade designated under GB. Its recorded composition includes C ≤ 0.2%, Si ≤ 0.35%, Ti ≤ 0.06%, V ≤ 0.1% and Mn ≤ 1.5%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 490–600 N/mm² and A ≥ 18%. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=ac481850-37ae-4930-b2db-db258011436b&designation=d5e711b2-64dc-40f8-a4a6-f4a9ec086a2e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/hp325.pdf "Datasheet as PDF") ## Chemical composition 9 elements on file · weight % What this alloy is Fe Mn Si C Iron — the balance, never listed by a standard — 97.7 % Mn — 1.5 % Si — 0.4 % C — 0.2 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.2 | | Si | ≤ 0.35 | | Mn | ≤ 1.5 | | P | ≤ 0.025 | | S | ≤ 0.012 | | V | ≤ 0.1 | | Al | ≥ 0.015 | | Ti | ≤ 0.06 | | Nb | ≤ 0.05 | Carbon Silicon Manganese Phosphorus Sulfur Vanadium Aluminium Titanium Niobium 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 | ≤0.2 | — | 0.200 | Max | | Al | ≥0.015 | 0.015 | — | Min | | Si | ≤0.35 | — | 0.350 | Max | | P | ≤0.025 | — | 0.025 | Max | | S | ≤0.012 | — | 0.012 | Max | | Ti | ≤0.06 | — | 0.060 | Max | | V | ≤0.1 | — | 0.100 | Max | | Mn | ≤1.5 | — | 1.500 | Max | | Nb | ≤0.05 | — | 0.050 | Max | 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, Cr, Mo. ## Physical & mechanical properties Rm 490~600 N/mm² Range A ≥18(t＜3)；≥22(t≥3)% Min 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=ac481850-37ae-4930-b2db-db258011436b&designation=d5e711b2-64dc-40f8-a4a6-f4a9ec086a2e "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gb/hp325.pdf "Datasheet as PDF")