--- title: "X20CrMoWV12-1 — High-temperature steels" description: "X20CrMoWV12-1: 16 equivalent designations across 6 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/x20crmowv12-1 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/x20crmowv12-1.md cs: https://steelequivalents.com/cs/materiály/din-en/x20crmowv12-1.md de: https://steelequivalents.com/de/werkstoffe/din-en/x20crmowv12-1.md es: https://steelequivalents.com/es/materiales/din-en/x20crmowv12-1.md fr: https://steelequivalents.com/fr/matériaux/din-en/x20crmowv12-1.md hu: https://steelequivalents.com/hu/anyagok/din-en/x20crmowv12-1.md it: https://steelequivalents.com/it/materiali/din-en/x20crmowv12-1.md nl: https://steelequivalents.com/nl/materialen/din-en/x20crmowv12-1.md pl: https://steelequivalents.com/pl/materiały/din-en/x20crmowv12-1.md pt: https://steelequivalents.com/pt/materiais/din-en/x20crmowv12-1.md ru: https://steelequivalents.com/ru/материалы/din-en/x20crmowv12-1.md tr: https://steelequivalents.com/tr/malzemeler/din-en/x20crmowv12-1.md zh: https://steelequivalents.com/zh/材料/din-en/x20crmowv12-1.md ja: https://steelequivalents.com/ja/材料/din-en/x20crmowv12-1.md ar: https://steelequivalents.com/ar/المواد/din-en/x20crmowv12-1.md ko: https://steelequivalents.com/ko/재료/din-en/x20crmowv12-1.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/x20crmowv12-1.md hi: https://steelequivalents.com/hi/सामग्री/din-en/x20crmowv12-1.md content_hash: sha256:c8f017408f184a70a81292fa289616927e397019df3472b2eff12f4750289c7b 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/din-en/x20crmowv12-1 > Canonical URL: https://steelequivalents.com/materials/din-en/x20crmowv12-1 > 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. DIN / EN · Europe · 16 designations # X20CrMoWV12-1 X20CrMoWV12-1 is a material in the category [High-temperature steels](/categories/high-temperature-steels "High-temperature steels"), held under material number 1.4935. We list 15 designations recorded for this grade, in the standards UNS, AISI / SAE, ASTM, SAE AMS and JIS. Its recorded composition includes C 0.17–0.24%, Cr 11–12.5%, Mn 0.3–0.8%, Ni 0.3–0.8% and Mo 0.8–1.2%. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.4935**](/materials/material-no/1.4935 "Material no.: 1.4935") - [*Category* **High-temperature steels · 40 grades**](/categories/high-temperature-steels "Category: High-temperature steels · 40 grades") - *Designations* **16** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=a3a58fcf-f35e-4c6d-9d45-4cc0d0d91200&designation=b8f246d6-e86d-47c0-97bc-726abf3ccde7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x20crmowv12-1.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS S42100 This grade’s own name](/materials/uns/s42100 "UNS S42100") - [AISI / SAE 422 This grade’s own name · 2 grades on that route](/materials/aisi-sae/422 "AISI / SAE 422") ## About High-temperature steels High-temperature steels are steels designed to retain useful strength and structural stability during exposure to elevated temperatures. Their alloying systems provide resistance to oxidation, creep and loss of mechanical properties during prolonged heating, making them suitable for furnace components, heat exchangers, boilers and other hot-service equipment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 16 designations · 6 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 - **X20CrMoWV12-1 This grade’s own name** UNS United States · 3 - [R30155 Indicative](/materials/uns/r30155 "UNS R30155") - [S42100 This grade’s own name](/materials/uns/s42100 "UNS S42100") - [S42200 This grade’s own name](/materials/uns/s42200 "UNS S42200") AISI / SAE United States · 4 - [422 This grade’s own name](/materials/aisi-sae/422 "AISI / SAE 422") - [51422 Indicative](/materials/aisi-sae/51422 "AISI / SAE 51422") - [616 This grade’s own name](/materials/aisi-sae/616 "AISI / SAE 616") - [661 Indicative](/materials/aisi-sae/661 "AISI / SAE 661") ASTM United States · 2 - [A 565 Indicative](/materials/astm/a-565 "ASTM A 565") - [A176 Indicative](/materials/astm/a176 "ASTM A176") SAE AMS United States / Aerospace · 5 - [5532 Indicative plate sheet strip](/materials/ams/5532 "SAE AMS 5532") - [5655 Indicative bar forging wire](/materials/ams/5655 "SAE AMS 5655") - [5769 Indicative bar forging ring](/materials/ams/5769 "SAE AMS 5769") - [5794 Indicative wire](/materials/ams/5794 "SAE AMS 5794") - [5795 Indicative](/materials/ams/5795 "SAE AMS 5795") JIS Japan · 1 - [SUH616 Indicative](/materials/jis/suh616 "JIS SUH616") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Cr Mo Mn Iron — the balance, never listed by a standard — 84.8 % Cr — 11.8 % Mo — 1 % Mn — 0.6 % Traces & impurities · 1.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.17–0.24 | | Si | 0.1–0.5 | | Mn | 0.3–0.8 | | P | 0.025 | | S | 0.015 | | Cr | 11–12.5 | | Mo | 0.8–1.2 | | Ni | 0.3–0.8 | | V | 0.2–0.35 | | W | 0.4–0.6 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Tungsten 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 | 0,17-0,24 | 0.170 | 0.240 | Range | | Si | 0,10-0,50 | 0.100 | 0.500 | Range | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | V | 0,20-0,35 | 0.200 | 0.350 | Range | | Cr | 11,0-12,5 | 11.000 | 12.500 | Range | | Mn | 0,30-0,80 | 0.300 | 0.800 | Range | | Ni | 0,30-0,80 | 0.300 | 0.800 | Range | | Mo | 0,80-1,20 | 0.800 | 1.200 | Range | | W | 0,40-0,60 | 0.400 | 0.600 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## 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 1.4, a shared category, and a published range for Cr / 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. [X19CrMo12-1 1.4921 Cr 11,0-12,5 · Mo 0,80-1,20 - ΔCr 0.00 - ΔMo 0.00 - 3 designations](/materials/din-en/x19crmo12-1 "X19CrMo12-1")[X22CrMoV12-1 1.4923 Cr 11,0-12,5 · Mo 0,80-1,20 - ΔCr 0.00 - ΔMo 0.00 - 9 designations](/materials/din-en/x22crmov12-1 "X22CrMoV12-1")[X21CrMoV12-1 1.4926 Cr 11,0-12,5 · Mo 0,80-1,20 - ΔCr 0.00 - ΔMo 0.00 - 1 designations](/materials/din-en/x21crmov12-1 "X21CrMoV12-1")[X23CrMoWMnNiV12-1-1 1.4929 Cr 11,0-12,5 · Mo 0,75-1,25 - ΔCr 0.00 - ΔMo 0.00 - 9 designations](/materials/din-en/x23crmowmnniv12-1-1 "X23CrMoWMnNiV12-1-1")[X15CrMo12-1 1.4920 Cr 11,0-12,0 · Mo 1,00-1,30 - ΔCr 0.25 - ΔMo 0.15 - 1 designations](/materials/din-en/x15crmo12-1 "X15CrMo12-1")[1.4922 1.4922 Cr 10,0-12,5 · Mo 0,80-1,20 - ΔCr 0.50 - ΔMo 0.00 - 16 designations](/materials/material-no/1.4922 "1.4922") ## 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=a3a58fcf-f35e-4c6d-9d45-4cc0d0d91200&designation=b8f246d6-e86d-47c0-97bc-726abf3ccde7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x20crmowv12-1.pdf "Datasheet as PDF")