--- title: "2.4606 — NiCr21Mo16W, 6 equivalent designations" description: "2.4606 is the material number of the grade also listed as NiCr21Mo16W. It is a material in the category Others. Designations recorded for this grade: 6." canonical: https://steelequivalents.com/materials/material-no/2.4606 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/2.4606.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/2.4606.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/2.4606.md es: https://steelequivalents.com/es/materiales/número-de-material/2.4606.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/2.4606.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/2.4606.md it: https://steelequivalents.com/it/materiali/numero-materiale/2.4606.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/2.4606.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/2.4606.md pt: https://steelequivalents.com/pt/materiais/número-do-material/2.4606.md ru: https://steelequivalents.com/ru/материалы/номер-материала/2.4606.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/2.4606.md zh: https://steelequivalents.com/zh/材料/材料编号/2.4606.md ja: https://steelequivalents.com/ja/材料/材料番号/2.4606.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/2.4606.md ko: https://steelequivalents.com/ko/재료/재료번호/2.4606.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/2.4606.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/2.4606.md content_hash: sha256:76974db86d6288a4bd82f84ad6139b6b8366252e31269126ae5b8740ffc05c72 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/2.4606 > Canonical URL: https://steelequivalents.com/materials/material-no/2.4606 > 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 · 6 designations # 2.4606 2.4606 is the material number of the grade also listed as NiCr21Mo16W. It is a material in the category Others. We list 6 designations recorded for this grade, in the standards DIN / EN, UNS, ISO and GB. - ***Material no.* **2.4606**** - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **6** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=c4c8e789-b09a-4506-81f9-b1fa637107ab "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/2.4606.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN NiCr21Mo16W This grade’s own name](/materials/din-en/nicr21mo16w "DIN / EN NiCr21Mo16W") - [UNS N06686 This grade’s own name · 3 grades on that route](/materials/uns/n06686 "UNS N06686") ## About Others These are miscellaneous metallic alloys that do not fit a more specific material family and may be based on iron, nickel, cobalt, copper or other alloy systems. They are selected for applications requiring particular combinations of strength, hardness, toughness, wear resistance or resistance to demanding service conditions. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 6 designations · 4 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 - [NiCr21Mo16W This grade’s own name](/materials/din-en/nicr21mo16w "DIN / EN NiCr21Mo16W") UNS United States · 1 - [N06686 This grade’s own name](/materials/uns/n06686 "UNS N06686") ISO International · 2 - [Ni6686 Indicative](/materials/iso/ni6686 "ISO Ni6686") - [NiCr21Mo16W4 Indicative](/materials/din-en/nicr21mo16w4 "ISO NiCr21Mo16W4") GB China · 2 - [H06686 Indicative](/materials/gb/h06686 "GB H06686") - [NS3309 Indicative](/materials/gb/ns3309 "GB NS3309") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 14 elements on file · weight % What this alloy is Fe Cr Mo W Iron — the balance, never listed by a standard — 56.6 % Cr — 21 % Mo — 16 % W — 3.7 % Traces & impurities · 2.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.01 | | Si | ≤ 0.08 | | Mn | ≤ 0.75 | | P | 0.025 | | S | 0.015 | | Cr | 19–23 | | Mo | 15–17 — Unusual | | Ni | Balance | | V | ≤ 0.2 | | W | 3–4.4 | | Co | ≤ 1 | | Al | ≤ 0.5 | | Ti | 0.02–0.25 | | Fe | ≤ 2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Tungsten Cobalt Aluminium Titanium 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 | | Al | ≤0,50 | — | 0.500 | Max | | Si | ≤0,08 | — | 0.080 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Ti | 0,02-0,25 | 0.020 | 0.250 | Range | | V | ≤0,20 | — | 0.200 | Max | | Cr | 19,0-23,0 | 19.000 | 23.000 | Range | | Mn | ≤0,75 | — | 0.750 | Max | | Fe | ≤2,00 | — | 2.000 | Max | | Co | ≤1,00 | — | 1.000 | Max | | Ni | Rest/Bal. | 50.770 | 62.940 | Balance | | Mo | 15,0-17,0 | 15.000 | 17.000 | Range | | W | 3,00-4,40 | 3.000 | 4.400 | 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 / Cr 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. [EL-NiCr20Mo9Nb 2.4621 Ni ≥58,0 · Cr 20,0-23,0 - ΔNi 1.14 - ΔCr 0.50 - 1 designations](/materials/din-en/el-nicr20mo9nb "EL-NiCr20Mo9Nb")[SG-NiCr20Mo15 2.4839 Ni ≥56,0 · Cr 19,0-21,0 - ΔNi 0.86 - ΔCr 1.00 - 1 designations](/materials/din-en/sg-nicr20mo15 "SG-NiCr20Mo15")[NiCr 20 Mo 15 2.4811 Ni ≥58,0 · Cr 19,0-21,0 - ΔNi 1.14 - ΔCr 1.00 - 1 designations](/materials/din-en/nicr20mo15 "NiCr 20 Mo 15")[EL-NiCr23Mo16Cu 2.4699 Ni Rest/Bal. · Cr 22,0-24,0 - ΔNi 0.26 - ΔCr 2.00 - 1 designations](/materials/din-en/el-nicr23mo16cu "EL-NiCr23Mo16Cu")[SG-NiCr23Mo16Cu 2.4698 Ni Rest/Bal. · Cr 22,0-24,0 - ΔNi 0.53 - ΔCr 2.00 - 1 designations](/materials/din-en/sg-nicr23mo16cu "SG-NiCr23Mo16Cu")[NiCr23Mo16Cu 2.4675 Ni Rest/Bal. · Cr 22,0-24,0 - ΔNi 0.54 - ΔCr 2.00 - 2 designations](/materials/din-en/nicr23mo16cu "NiCr23Mo16Cu") ## 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=c4c8e789-b09a-4506-81f9-b1fa637107ab "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/2.4606.pdf "Datasheet as PDF")