--- title: "B335 — Nickel and cobalt alloys" description: "B335 in ASTM: material number 2.4617, also listed as NiMo28. Category: Nickel and cobalt alloys. Designations recorded for this grade: 16." canonical: https://steelequivalents.com/materials/astm/b335 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/b335.md cs: https://steelequivalents.com/cs/materiály/astm/b335.md de: https://steelequivalents.com/de/werkstoffe/astm/b335.md es: https://steelequivalents.com/es/materiales/astm/b335.md fr: https://steelequivalents.com/fr/matériaux/astm/b335.md hu: https://steelequivalents.com/hu/anyagok/astm/b335.md it: https://steelequivalents.com/it/materiali/astm/b335.md nl: https://steelequivalents.com/nl/materialen/astm/b335.md pl: https://steelequivalents.com/pl/materiały/astm/b335.md pt: https://steelequivalents.com/pt/materiais/astm/b335.md ru: https://steelequivalents.com/ru/материалы/astm/b335.md tr: https://steelequivalents.com/tr/malzemeler/astm/b335.md zh: https://steelequivalents.com/zh/材料/astm/b335.md ja: https://steelequivalents.com/ja/材料/astm/b335.md ar: https://steelequivalents.com/ar/المواد/astm/b335.md ko: https://steelequivalents.com/ko/재료/astm/b335.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/b335.md hi: https://steelequivalents.com/hi/सामग्री/astm/b335.md content_hash: sha256:2d4a1843941b594ca16304077a78eca75949a09e5a3134518ca9e0a7686ed631 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/astm/b335 > Canonical URL: https://steelequivalents.com/materials/astm/b335 > 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. ASTM · United States · 16 designations # B335 B335 is a designation in ASTM for the material held under material number 2.4617, also listed as NiMo28. It is a material in the category Nickel and cobalt alloys. We list 16 designations recorded for this grade, in the standards DIN / EN, UNS, ASTM, ISO and GOST. - [*Material no.* **2.4617**](/materials/material-no/2.4617 "Material no.: 2.4617") - [*Category* **Nickel and cobalt alloys · 87 grades**](/categories/nickel-and-cobalt-alloys "Category: Nickel and cobalt alloys · 87 grades") - *Designations* **16** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f3071adf-9ebc-4205-add2-5cd0445e6141&designation=7795c946-962e-4fc9-82cc-99349d821124 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/b335.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN NiMo28 This grade’s own name · 3 grades on that route](/materials/din-en/nimo28 "DIN / EN NiMo28") - [UNS N10665 This grade’s own name · 4 grades on that route](/materials/uns/n10665 "UNS N10665") ## About Nickel and cobalt alloys Nickel and cobalt alloys are metallic materials whose properties are developed through nickel-, cobalt-, or combined alloying systems. They are characterised by strong resistance to corrosion, oxidation, wear, and loss of strength at elevated temperatures, making them suitable for turbine components, chemical-processing equipment, and other demanding high-temperature applications. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 16 designations · 5 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 - [NiMo28 This grade’s own name](/materials/din-en/nimo28 "DIN / EN NiMo28") UNS United States · 2 - [N10665 This grade’s own name](/materials/uns/n10665 "UNS N10665") - [R30008 This grade’s own name](/materials/uns/r30008 "UNS R30008") ASTM United States · 9 - [B333 Indicative](/materials/astm/b333 "ASTM B333") - **B335 Indicative** - [B366 Indicative](/materials/astm/b366 "ASTM B366") - [B462 Indicative](/materials/astm/b462 "ASTM B462") - [B564 Indicative](/materials/astm/b564 "ASTM B564") - [B619 Indicative](/materials/astm/b619 "ASTM B619") - [B622 Indicative](/materials/astm/b622 "ASTM B622") - [B626 Indicative](/materials/astm/b626 "ASTM B626") - [B775 Indicative](/materials/astm/b775 "ASTM B775") ISO International · 2 - [C-NiMo31 Indicative](/materials/iso/c-nimo31 "ISO C-NiMo31") - [NW0665 Indicative](/materials/iso/nw0665 "ISO NW0665") GOST Russia / CIS · 2 - [EP495-VI Indicative](/materials/gost/ep495-vi "GOST EP495-VI") - [N70M-VI Indicative](/materials/gost/n70m-vi "GOST N70M-VI") 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 Mo Mn Cr Iron — the balance, never listed by a standard — 68.4 % Mo — 28 % Mn — 1 % Cr — 1 % Traces & impurities · 1.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.01 | | Si | ≤ 0.08 | | Mn | ≤ 1 | | P | 0.025 | | S | 0.015 | | Cr | ≤ 1 | | Mo | 26–30 | | Ni | Balance | | Co | ≤ 1 | | Cu | ≤ 0.5 | | Fe | ≤ 2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Cobalt Copper Iron 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 | ≤0,010 | — | 0.010 | Max | | Si | ≤0,08 | — | 0.080 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | ≤1,00 | — | 1.000 | Max | | Mn | ≤1,00 | — | 1.000 | Max | | Fe | ≤2,00 | — | 2.000 | Max | | Co | ≤1,00 | — | 1.000 | Max | | Ni | Rest/Bal. | 64.370 | 73.960 | Balance | | Cu | ≤0,50 | — | 0.500 | Max | | Mo | 26,0-30,0 | 26.000 | 30.000 | 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: 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 2.4, a shared category, and a published range for Ni / Mo 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. [G-NiMo 30 2.4882 Ni Rest/Bal. · Mo 26,0-30,0 - ΔNi 5.45 - ΔMo 0.00 - 4 designations](/materials/din-en/g-nimo-30 "G-NiMo 30")[NiMo 30 2.4810 Ni ≥62,0 · Mo 26,0-30,0 - ΔNi 7.16 - ΔMo 0.00 - 2 designations](/materials/din-en/nimo-30 "NiMo 30")[S-NiMo 30 2.4800 Ni ≥60,0 · Mo 26,0-30,0 - ΔNi 9.16 - ΔMo 0.00 - 2 designations](/materials/din-en/s-nimo-30 "S-NiMo 30") ## 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=f3071adf-9ebc-4205-add2-5cd0445e6141&designation=7795c946-962e-4fc9-82cc-99349d821124 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/b335.pdf "Datasheet as PDF")