--- title: "1.8962 — Weathering steels" description: "1.8962 is the material number of the grade also listed as 9CrNiCuP3-2-4. Category: Weathering steels. Designations recorded for this grade: 12." canonical: https://steelequivalents.com/materials/material-no/1.8962 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.8962.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.8962.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.8962.md es: https://steelequivalents.com/es/materiales/número-de-material/1.8962.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.8962.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.8962.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.8962.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.8962.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.8962.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.8962.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.8962.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.8962.md zh: https://steelequivalents.com/zh/材料/材料编号/1.8962.md ja: https://steelequivalents.com/ja/材料/材料番号/1.8962.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.8962.md ko: https://steelequivalents.com/ko/재료/재료번호/1.8962.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.8962.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.8962.md content_hash: sha256:f460750df6ac692efde67af6f13f42c905b8d0ee50df920005278b805eda0c89 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/1.8962 > Canonical URL: https://steelequivalents.com/materials/material-no/1.8962 > 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 · 12 designations # 1.8962 1.8962 is the material number of the grade also listed as 9CrNiCuP3-2-4. It is a material in the category Weathering steels. We list 12 designations recorded for this grade, in the standards DIN / EN, UNS and ČSN. - ***Material no.* **1.8962**** - [*Category* **Weathering steels · 27 grades**](/categories/weathering-steels "Category: Weathering steels · 27 grades") - *Designations* **12** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=156ce561-668f-405b-a3bd-5fbe9d22f7c7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.8962.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 9CrNiCuP3-2-4 This grade’s own name · 2 grades on that route](/materials/din-en/9crnicup3-2-4 "DIN / EN 9CrNiCuP3-2-4") - [UNS K11430 This grade’s own name · 4 grades on that route](/materials/uns/k11430 "UNS K11430") ## About Weathering steels Weathering steels are structural steels designed to develop a protective patina when exposed to the atmosphere. This characteristic helps limit further corrosion and makes them suitable for bridges, building facades, rail vehicles and other outdoor structures where reduced coating maintenance is desirable. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 12 designations · 3 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 - [9CrNiCuP3-2-4 This grade’s own name](/materials/din-en/9crnicup3-2-4 "DIN / EN 9CrNiCuP3-2-4") UNS United States · 10 - [K11430 This grade’s own name](/materials/uns/k11430 "UNS K11430") - [K11510 This grade’s own name](/materials/uns/k11510 "UNS K11510") - [K11535 This grade’s own name](/materials/uns/k11535 "UNS K11535") - [K11538 This grade’s own name](/materials/uns/k11538 "UNS K11538") - [K11541 This grade’s own name](/materials/uns/k11541 "UNS K11541") - [K11552 This grade’s own name](/materials/uns/k11552 "UNS K11552") - [K11567 This grade’s own name](/materials/uns/k11567 "UNS K11567") - [K12032 This grade’s own name](/materials/uns/k12032 "UNS K12032") - [K12043 This grade’s own name](/materials/uns/k12043 "UNS K12043") - [K12044 This grade’s own name](/materials/uns/k12044 "UNS K12044") ČSN Czechia · 1 - [15217 Indicative](/materials/csn/15217 "ČSN 15217") 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 — 97 % Cr — 0.9 % Ni — 0.7 % Si — 0.5 % Traces & impurities · 1 % 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 | 0.2–0.5 | | P | 0.07–0.15 | | S | 0.035 | | Cr | 0.5–1.25 | | 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 | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,50-1,25 | 0.500 | 1.250 | Range | | Mn | 0,20-0,50 | 0.200 | 0.500 | Range | | Ni | 0,65 | 0.650 | 0.650 | Exact | | 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 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 1.8, 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. [9CrNiCuP324 1.8945 Cr 0,30-1,25 · Ni (0,65) - ΔCr 0.10 - ΔNi 0.00 - 37 designations](/materials/din-en/9crnicup3-2-4 "9CrNiCuP324")[Fe510D1KI 1.8946 Cr 0,30-1,25 · Ni (0,65) - ΔCr 0.10 - ΔNi 0.00 - 7 designations](/materials/din-en/fe510d1ki "Fe510D1KI")[Fe360CKI 1.8958 Cr 0,40-0,80 · Ni (0,65) - ΔCr 0.27 - ΔNi 0.00 - 5 designations](/materials/din-en/fe360cki "Fe360CKI")[A709-50W 1.8959 Cr 0,40-0,80 · Ni (0,65) - ΔCr 0.27 - ΔNi 0.00 - 23 designations](/materials/din-en/a709-50w "A709-50W")[Fe360DKI 1.8961 Cr 0,40-0,80 · Ni (0,65) - ΔCr 0.27 - ΔNi 0.00 - 6 designations](/materials/din-en/fe360dki "Fe360DKI")[A600C 1.8963 Cr 0,40-0,80 · Ni 0,65 - ΔCr 0.27 - ΔNi 0.00 - 29 designations](/materials/din-en/a600c "A600C") ## 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=156ce561-668f-405b-a3bd-5fbe9d22f7c7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.8962.pdf "Datasheet as PDF")