--- title: "304C15 — Cast stainless steels" description: "304C15 in BS: material number 1.4308, also listed as G-X 6 CrNi 18 9. Category: Cast stainless steels. Designations recorded for this grade: 29." canonical: https://steelequivalents.com/materials/bs/304c15 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/bs/304c15.md cs: https://steelequivalents.com/cs/materiály/bs/304c15.md de: https://steelequivalents.com/de/werkstoffe/bs/304c15.md es: https://steelequivalents.com/es/materiales/bs/304c15.md fr: https://steelequivalents.com/fr/matériaux/bs/304c15.md hu: https://steelequivalents.com/hu/anyagok/bs/304c15.md it: https://steelequivalents.com/it/materiali/bs/304c15.md nl: https://steelequivalents.com/nl/materialen/bs/304c15.md pl: https://steelequivalents.com/pl/materiały/bs/304c15.md pt: https://steelequivalents.com/pt/materiais/bs/304c15.md ru: https://steelequivalents.com/ru/материалы/bs/304c15.md tr: https://steelequivalents.com/tr/malzemeler/bs/304c15.md zh: https://steelequivalents.com/zh/材料/bs/304c15.md ja: https://steelequivalents.com/ja/材料/bs/304c15.md ar: https://steelequivalents.com/ar/المواد/bs/304c15.md ko: https://steelequivalents.com/ko/재료/bs/304c15.md pt-br: https://steelequivalents.com/pt-br/materiais/bs/304c15.md hi: https://steelequivalents.com/hi/सामग्री/bs/304c15.md content_hash: sha256:8177ee06835e0b781de6fc18f3501d4b2470a9a370703c902b551fdd0c7442f5 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/bs/304c15 > Canonical URL: https://steelequivalents.com/materials/bs/304c15 > 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. BS · United Kingdom · 29 designations # 304C15 304C15 is a designation in BS for the material held under material number 1.4308, also listed as G-X 6 CrNi 18 9. It is a material in the category Cast stainless steels. We list 29 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GOST, UNI, SS and ČSN. - [*Material no.* **1.4308**](/materials/material-no/1.4308 "Material no.: 1.4308") - [*Category* **Cast stainless steels · 87 grades**](/categories/cast-stainless-steels "Category: Cast stainless steels · 87 grades") - *Designations* **29** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=bf290afb-2dd9-46f6-ba91-e2b2c943cc16&designation=ea85c104-e9c2-4c23-9d34-ed62f0c83329 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/304c15.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX5CrNi19-10 This grade’s own name](/materials/din-en/gx5crni19-10 "DIN / EN GX5CrNi19-10") - [UNS J92590 This grade’s own name](/materials/uns/j92590 "UNS J92590") - [AISI / SAE 304H This grade’s own name · 3 grades on that route](/materials/aisi-sae/304h "AISI / SAE 304H") ## About Cast stainless steels Cast stainless steels are stainless-steel materials produced by casting, combining corrosion resistance with the ability to form complex component shapes. Their composition and mechanical behaviour vary by grade, and they are used for corrosion-resistant cast components such as pumps, valves and process equipment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 29 designations · 11 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 · 3 - [1.4308 Indicative](/materials/material-no/1.4308 "DIN / EN 1.4308") - [G-X 6 CrNi 18 9 This grade’s own name Withdrawn](/materials/din-en/g-x-6-crni-18-9 "DIN / EN G-X 6 CrNi 18 9") - [GX5CrNi19-10 This grade’s own name](/materials/din-en/gx5crni19-10 "DIN / EN GX5CrNi19-10") UNS United States · 4 - [J92590 This grade’s own name](/materials/uns/j92590 "UNS J92590") - [J92600 This grade’s own name](/materials/uns/j92600 "UNS J92600") - [J92650 This grade’s own name](/materials/uns/j92650 "UNS J92650") - [J92710 This grade’s own name](/materials/uns/j92710 "UNS J92710") AISI / SAE United States · 7 - [304H This grade’s own name](/materials/aisi-sae/304h "AISI / SAE 304H") - [CF-8 Indicative](/materials/aisi-sae/cf-8 "AISI / SAE CF-8") - [J92590 Indicative](/materials/uns/j92590 "AISI / SAE J92590") - [J92600 Indicative](/materials/uns/j92600 "AISI / SAE J92600") - [J92650 Indicative](/materials/uns/j92650 "AISI / SAE J92650") - [J92710 Indicative](/materials/uns/j92710 "AISI / SAE J92710") - [J92730 Indicative](/materials/uns/j92730 "AISI / SAE J92730") BS United Kingdom · 1 - **304C15 Indicative** AFNOR France · 3 - [Z6CN18.10M Indicative](/materials/afnor/z6cn18-10m "AFNOR Z6CN18.10M") - [Z6CN18.1OM Indicative](/materials/afnor/z6cn18-1om "AFNOR Z6CN18.1OM") - [Z6CN19.9M Indicative](/materials/afnor/z6cn19-9m "AFNOR Z6CN19.9M") UNE Spain · 1 - [F.8411 Indicative](/materials/une/f-8411 "UNE F.8411") JIS Japan · 3 - [SCS 13A Indicative](/materials/jis/scs13a "JIS SCS 13A") - [SCS 13X Indicative](/materials/jis/scs13x "JIS SCS 13X") - [SCS13 Indicative](/materials/jis/scs13 "JIS SCS13") GOST Russia / CIS · 4 - [07Ch18N9L Indicative](/materials/gost/07ch18n9l "GOST 07Ch18N9L") - [07KH18N9L Indicative](/materials/gost/07kh18n9l "GOST 07KH18N9L") - [07Х18Н9Л Indicative](/materials/gost/07kh18n9l "GOST 07Х18Н9Л") - [Sv-07Kh18N9TYu Indicative](/materials/gost/sv-07kh18n9tyu "GOST Sv-07Kh18N9TYu") UNI Italy · 1 - [GX6CrNi20-10 Indicative](/materials/uni/gx6crni20-10 "UNI GX6CrNi20-10") SS Sweden · 1 - [2333 Indicative](/materials/ss/2333 "SS 2333") ČSN Czechia · 1 - [422930 Indicative](/materials/csn/422930 "ČSN 422930") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 8 elements on file · weight % What this alloy is Fe Cr Ni Si Iron — the balance, never listed by a standard — 67.9 % Cr — 19 % Ni — 9.5 % Si — 1.5 % Traces & impurities · 2.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.07 | | Si | ≤ 1.5 | | Mn | ≤ 1.5 | | P | 0.04 | | S | 0.03 | | Cr | 18–20 | | Ni | 8–11 | | Cu | ≤ 0.5 | 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 | ≤0,07 | — | 0.070 | Max | | Si | ≤1,50 | — | 1.500 | Max | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 18,0-20,0 | 18.000 | 20.000 | Range | | Mn | ≤1,50 | — | 1.500 | Max | | Ni | 8,00-11,0 | 8.000 | 11.000 | Range | | Cu | ≤0,50 | — | 0.500 | 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: Mo. ## 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 · 9 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | Rm N/mm² | Re N/mm² | A% | HB | |---|---|---|---|---| | Casting | 440 | 185 | 30 | — | | Solution heat treatment | — | — | — | 183 | By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Casting | 450 | 180 | 25 | 35 | 1000 | 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 1.4, a shared category, and a published range for Cr / Ni 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. [GX8CrNi19-10 1.4815 Cr 18,0-20,0 · Ni 9,00-11,0 - ΔCr 0.00 - ΔNi 0.50 - 3 designations](/materials/din-en/gx8crni19-10 "GX8CrNi19-10")[GX2CrNi19-11 1.4309 Cr 18,0-20,0 · Ni 9,00-12,0 - ΔCr 0.00 - ΔNi 1.00 - 13 designations](/materials/din-en/gx2crni19-11 "GX2CrNi19-11")[1.4408 1.4408 Cr 18,0-20,0 · Ni 9,00-12,0 - ΔCr 0.00 - ΔNi 1.00 - 17 designations](/materials/material-no/1.4408 "1.4408")[GX2CrNiMo19-11-2 1.4409 Cr 18,0-20,0 · Ni 9,00-12,0 - ΔCr 0.00 - ΔNi 1.00 - 11 designations](/materials/din-en/gx2crnimo19-11-2 "GX2CrNiMo19-11-2")[GX5CrNiNb19-11 1.4552 Cr 18,0-20,0 · Ni 9,00-12,0 - ΔCr 0.00 - ΔNi 1.00 - 15 designations](/materials/din-en/gx5crninb19-11 "GX5CrNiNb19-11")[1.4581 1.4581 Cr 18,0-20,0 · Ni 9,00-12,0 - ΔCr 0.00 - ΔNi 1.00 - 16 designations](/materials/material-no/1.4581 "1.4581") ## 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=bf290afb-2dd9-46f6-ba91-e2b2c943cc16&designation=ea85c104-e9c2-4c23-9d34-ed62f0c83329 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/304c15.pdf "Datasheet as PDF")