--- title: "20H12MIF — High-temperature steels" description: "20H12MIF in PN: material number 1.4923, also listed as X21CrMoNiV12-1. Category: High-temperature steels. Designations recorded for this grade: 9." canonical: https://steelequivalents.com/materials/pn/20h12mif language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/pn/20h12mif.md cs: https://steelequivalents.com/cs/materiály/pn/20h12mif.md de: https://steelequivalents.com/de/werkstoffe/pn/20h12mif.md es: https://steelequivalents.com/es/materiales/pn/20h12mif.md fr: https://steelequivalents.com/fr/matériaux/pn/20h12mif.md hu: https://steelequivalents.com/hu/anyagok/pn/20h12mif.md it: https://steelequivalents.com/it/materiali/pn/20h12mif.md nl: https://steelequivalents.com/nl/materialen/pn/20h12mif.md pl: https://steelequivalents.com/pl/materiały/pn/20h12mif.md pt: https://steelequivalents.com/pt/materiais/pn/20h12mif.md ru: https://steelequivalents.com/ru/материалы/pn/20h12mif.md tr: https://steelequivalents.com/tr/malzemeler/pn/20h12mif.md zh: https://steelequivalents.com/zh/材料/pn/20h12mif.md ja: https://steelequivalents.com/ja/材料/pn/20h12mif.md ar: https://steelequivalents.com/ar/المواد/pn/20h12mif.md ko: https://steelequivalents.com/ko/재료/pn/20h12mif.md pt-br: https://steelequivalents.com/pt-br/materiais/pn/20h12mif.md hi: https://steelequivalents.com/hi/सामग्री/pn/20h12mif.md content_hash: sha256:5f6a3a8b9d9f6ab9f3549aefc2648decc468090e70e213dfb735f865e9d6c130 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/pn/20h12mif > Canonical URL: https://steelequivalents.com/materials/pn/20h12mif > 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. PN · Poland · 9 designations # 20H12MIF 20H12MIF is a designation in PN for the material held under material number 1.4923, also listed as X21CrMoNiV12-1. It is a material in the category High-temperature steels. We list 9 designations recorded for this grade, in the standards DIN / EN, BS, AFNOR, ČSN, STN and PN. - [*Material no.* **1.4923**](/materials/material-no/1.4923 "Material no.: 1.4923") - [*Category* **High-temperature steels · 40 grades**](/categories/high-temperature-steels "Category: High-temperature steels · 40 grades") - *Designations* **9** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=9c88e970-3637-418e-b0c7-13806969e1a0&designation=8c024ecf-3e8c-4bcc-a50e-6260103abdb7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/pn/20h12mif.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X22CrMoV12-1 This grade’s own name · 2 grades on that route](/materials/din-en/x22crmov12-1 "DIN / EN X22CrMoV12-1") ## 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 9 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 · 2 - [X21CrMoNiV12-1 This grade’s own name Withdrawn](/materials/din-en/x21crmoniv12-1 "DIN / EN X21CrMoNiV12-1") - [X22CrMoV12-1 This grade’s own name](/materials/din-en/x22crmov12-1 "DIN / EN X22CrMoV12-1") BS United Kingdom · 1 - [762 Indicative](/materials/bs/762 "BS 762") AFNOR France · 2 - [Z20CDNbV11 Indicative](/materials/afnor/z20cdnbv11 "AFNOR Z20CDNbV11") - [Z21CDV12 Indicative](/materials/afnor/z21cdv12 "AFNOR Z21CDV12") ČSN Czechia · 1 - [17134 Indicative](/materials/csn/17134 "ČSN 17134") STN Slovakia · 1 - [17 134 Indicative](/materials/csn/17134 "STN 17 134") PN Poland · 2 - **20H12MIF Indicative** - [23H12MNF Indicative](/materials/pn/23h12mnf "PN 23H12MNF") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Mo Mn Iron — the balance, never listed by a standard — 85 % Cr — 11.8 % Mo — 1 % Mn — 0.7 % Traces & impurities · 1.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.18–0.24 | | Si | ≤ 0.5 | | Mn | 0.4–0.9 | | P | 0.025 | | S | 0.015 | | Cr | 11–12.5 | | Mo | 0.8–1.2 | | Ni | 0.3–0.8 | | V | 0.25–0.35 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium 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 | 0,18-0,24 | 0.180 | 0.240 | Range | | Si | ≤0,50 | — | 0.500 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | V | 0,25-0,35 | 0.250 | 0.350 | Range | | Cr | 11,0-12,5 | 11.000 | 12.500 | Range | | Mn | 0,40-0,90 | 0.400 | 0.900 | Range | | Ni | 0,30-0,80 | 0.300 | 0.800 | Range | | Mo | 0,80-1,20 | 0.800 | 1.200 | 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 7,7 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 1 conditions · 1 values By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 302 | 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 / 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")[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")[X20CrMoWV12-1 1.4935 Cr 11,0-12,5 · Mo 0,80-1,20 - ΔCr 0.00 - ΔMo 0.00 - 16 designations](/materials/din-en/x20crmowv12-1 "X20CrMoWV12-1")[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=9c88e970-3637-418e-b0c7-13806969e1a0&designation=8c024ecf-3e8c-4bcc-a50e-6260103abdb7 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/pn/20h12mif.pdf "Datasheet as PDF")