--- title: "1.0505 — Fine-grain structural steels" description: "1.0505 is the material number of the grade also listed as P315N. Category: Fine-grain structural steels. Designations recorded for this grade: 7." canonical: https://steelequivalents.com/materials/material-no/1.0505 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.0505.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.0505.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.0505.md es: https://steelequivalents.com/es/materiales/número-de-material/1.0505.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.0505.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.0505.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.0505.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.0505.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.0505.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.0505.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.0505.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.0505.md zh: https://steelequivalents.com/zh/材料/材料编号/1.0505.md ja: https://steelequivalents.com/ja/材料/材料番号/1.0505.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.0505.md ko: https://steelequivalents.com/ko/재료/재료번호/1.0505.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.0505.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.0505.md content_hash: sha256:2d3c43549f4c52abb550603d1dd67694c6faf41db811e55ab717a6d3de3e1c4e 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/1.0505 > Canonical URL: https://steelequivalents.com/materials/material-no/1.0505 > 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 · 7 designations # 1.0505 1.0505 is the material number of the grade also listed as P315N. It is a material in the category Fine-grain structural steels. We list 7 designations recorded for this grade, in the standards DIN / EN and UNS. - ***Material no.* **1.0505**** - [*Category* **Fine-grain structural steels · 50 grades**](/categories/fine-grain-structural-steels "Category: Fine-grain structural steels · 50 grades") - *Designations* **7** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=b3d08920-cafd-4087-85a4-420d94c20095 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0505.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN P315N This grade’s own name](/materials/din-en/p315n "DIN / EN P315N") - [UNS K01802 This grade’s own name · 7 grades on that route](/materials/uns/k01802 "UNS K01802") ## About Fine-grain structural steels Fine-grain structural steel is a name for structural steels whose properties are particularly suitable for welding. They have a higher yield strength than comparable steels. Due to the negative influence of carbon on the weldability of a material, the maximum carbon content in fine-grained structural steels is less than 0.2%. These properties are achieved in steelmaking by the addition of oxygen and nitrogen-binding elements. The fine grain in the metallurgical structure is achieved by alloying elements whose nitrides and carbides only dissolve at higher temperatures. With the same composition, they are stronger and tougher than coarse-grained steels. Fine-grained structural steels are used above all in reinforced concrete structures such as bridges, in the construction of cranes, hydraulic cylinders or other welded structures due to their special welding suitability and in the offshore area. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 7 designations · 2 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 · 2 - [P315N This grade’s own name](/materials/din-en/p315n "DIN / EN P315N") - [StE 315 This grade’s own name](/materials/din-en/ste-315 "DIN / EN StE 315") UNS United States · 5 - [K01802 This grade’s own name](/materials/uns/k01802 "UNS K01802") - [K02203 This grade’s own name](/materials/uns/k02203 "UNS K02203") - [K02403 This grade’s own name](/materials/uns/k02403 "UNS K02403") - [K02404 This grade’s own name](/materials/uns/k02404 "UNS K02404") - [K02601 Indicative](/materials/uns/k02601 "UNS K02601") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 11 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 97.6 % Mn — 1.1 % Si — 0.5 % Cr — 0.3 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.18 | | Si | ≤ 0.45 | | Mn | 0.7–1.5 | | P | 0.035 | | S | 0.03 | | Cr | ≤ 0.3 | | Mo | ≤ 0.08 | | Cu | ≤ 0.2 | | Al | ≥ 0.02 | | Nb | ≤ 0.03 | | N | 0.02 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Copper Aluminium Niobium Nitrogen 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 | ≤0,18 | — | 0.180 | Max | | N | 0,02 | 0.020 | 0.020 | Exact | | Al | ≥0,020 | 0.020 | — | Min | | Si | ≤0,45 | — | 0.450 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | 0,70-1,50 | 0.700 | 1.500 | Range | | Cu | ≤0,20 | — | 0.200 | Max | | Nb | ≤0,03 | — | 0.030 | Max | | Mo | ≤0,08 | — | 0.080 | 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. ## 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 1.0, a shared category, and a published range for Mn / Si 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. [P315NH 1.0506 Mn 0,70-1,50 · Si ≤0,45 - ΔMn 0.00 - ΔSi 0.00 - 7 designations](/materials/din-en/p315nh "P315NH")[P315NL 1.0508 Mn 0,70-1,50 · Si ≤0,45 - ΔMn 0.00 - ΔSi 0.00 - 7 designations](/materials/din-en/p315nl "P315NL")[1.0486 1.0486 Mn 0,80-1,50 · Si ≤0,40 - ΔMn 0.05 - ΔSi 0.02 - 18 designations](/materials/material-no/1.0486 "1.0486")[P275NH 1.0487 Mn 0,80-1,50 · Si ≤0,40 - ΔMn 0.05 - ΔSi 0.02 - 10 designations](/materials/din-en/p275nh "P275NH")[A662Gr.A 1.0488 Mn 0,60-1,50 · Si ≤0,40 - ΔMn 0.05 - ΔSi 0.02 - 18 designations](/materials/din-en/a662gr-a "A662Gr.A")[1.0486 1.0490 Mn 0,50-1,50 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.02 - 12 designations](/materials/material-no/1.0486 "1.0486") ## 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=b3d08920-cafd-4087-85a4-420d94c20095 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.0505.pdf "Datasheet as PDF")