--- title: "X12 — Tool steels for cold work" description: "X12 in GOST: material number 1.2080, also listed as X210Cr12. Category: Tool steels for cold work. Designations recorded for this grade: 32." canonical: https://steelequivalents.com/materials/gost/x12 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/x12.md cs: https://steelequivalents.com/cs/materiály/gost/x12.md de: https://steelequivalents.com/de/werkstoffe/gost/x12.md es: https://steelequivalents.com/es/materiales/gost/x12.md fr: https://steelequivalents.com/fr/matériaux/gost/x12.md hu: https://steelequivalents.com/hu/anyagok/gost/x12.md it: https://steelequivalents.com/it/materiali/gost/x12.md nl: https://steelequivalents.com/nl/materialen/gost/x12.md pl: https://steelequivalents.com/pl/materiały/gost/x12.md pt: https://steelequivalents.com/pt/materiais/gost/x12.md ru: https://steelequivalents.com/ru/материалы/gost/x12.md tr: https://steelequivalents.com/tr/malzemeler/gost/x12.md zh: https://steelequivalents.com/zh/材料/gost/x12.md ja: https://steelequivalents.com/ja/材料/gost/x12.md ar: https://steelequivalents.com/ar/المواد/gost/x12.md ko: https://steelequivalents.com/ko/재료/gost/x12.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/x12.md hi: https://steelequivalents.com/hi/सामग्री/gost/x12.md content_hash: sha256:ea5907a05fb2d7e4e761f09316edc572120529bd2771f8ad0c2e6673aeeaea92 generated: 2026-09-22 --- > **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/gost/x12 > Canonical URL: https://steelequivalents.com/materials/gost/x12 > 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. GOST · Russia / CIS · 32 designations # X12 X12 is a designation in GOST for the material held under material number 1.2080, also listed as X210Cr12. It is a material in the category Tool steels for cold work. We list 32 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, STN, SRPS, HRN, PN, ÖNORM and KS. - [*Material no.* **1.2080**](/materials/material-no/1.2080 "Material no.: 1.2080") - [*Category* **Tool steels for cold work · 109 grades**](/categories/tool-steels-for-cold-work "Category: Tool steels for cold work · 109 grades") - *Designations* **32** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=c1974115-6266-40ec-924f-90ccf3e7d8b4&designation=2110a69f-305d-4148-97d0-32e43cf23b91 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/x12.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X210Cr12 This grade’s own name](/materials/din-en/x210cr12 "DIN / EN X210Cr12") - [UNS T30403 This grade’s own name · 2 grades on that route](/materials/uns/t30403 "UNS T30403") - [AISI / SAE D3 This grade’s own name · 3 grades on that route](/materials/din-en/d3 "AISI / SAE D3") ## About Tool steels for cold work Cold-work tool steels are high-strength tool materials designed for shaping, cutting and forming operations carried out without significant heating of the workpiece. They are characterised by high hardness, wear resistance and the ability to retain a sharp or precise working edge, making them suitable for dies, punches, cutting tools and other tooling exposed to repeated mechanical contact. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 32 designations · 19 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 - [1.2080 Indicative](/materials/material-no/1.2080 "DIN / EN 1.2080") - [X210Cr12 This grade’s own name](/materials/din-en/x210cr12 "DIN / EN X210Cr12") UNS United States · 1 - [T30403 This grade’s own name](/materials/uns/t30403 "UNS T30403") AISI / SAE United States · 3 - [ASTM D3 Indicative](/materials/aisi-sae/astm-d3 "AISI / SAE ASTM D3") - [D3 This grade’s own name](/materials/din-en/d3 "AISI / SAE D3") - [D3 ASTM D3 Indicative](/materials/aisi-sae/d3-astm-d3 "AISI / SAE D3 ASTM D3") BS United Kingdom · 1 - [BD3 Indicative](/materials/bs/bd3 "BS BD3") AFNOR France · 2 - [Z200C12 Indicative](/materials/afnor/z200c12 "AFNOR Z200C12") - [Z210CW12-01 Indicative](/materials/afnor/z210cw12-01 "AFNOR Z210CW12-01") UNE Spain · 2 - [F.5212 Indicative](/materials/une/f-5212 "UNE F.5212") - [X210Cr12 Indicative](/materials/din-en/x210cr12 "UNE X210Cr12") ISO International · 3 - [210Cr12 Indicative](/materials/iso/210cr12 "ISO 210Cr12") - [X210Cr12 Indicative](/materials/din-en/x210cr12 "ISO X210Cr12") - [X210CrW12 Indicative](/materials/din-en/x210crw12 "ISO X210CrW12") JIS Japan · 1 - [SKD1 Indicative](/materials/jis/skd1 "JIS SKD1") GB China · 1 - [Cr12 Indicative](/materials/gb/cr12 "GB Cr12") GOST Russia / CIS · 4 - [Ch12 Indicative](/materials/bds/ch12 "GOST Ch12") - [H12 Indicative](/materials/aisi-sae/h12 "GOST H12") - [KH12 Indicative](/materials/gost/kh12 "GOST KH12") - **X12 Indicative** UNI Italy · 3 - [X205Cr12KU Indicative](/materials/uni/x205cr12ku "UNI X205Cr12KU") - [X210Cr13KU Indicative](/materials/uni/x210cr13ku "UNI X210Cr13KU") - [X250Cr12KU Indicative](/materials/uni/x250cr12ku "UNI X250Cr12KU") SS Sweden · 1 - [2312 Indicative](/materials/gost/2312 "SS 2312") ČSN Czechia · 2 - [19 435 Indicative](/materials/csn/19435 "ČSN 19 435") - [19436 Indicative](/materials/csn/19436 "ČSN 19436") STN Slovakia · 1 - [19 436 Indicative](/materials/csn/19436 "STN 19 436") SRPS Serbia · 1 - [Č.4150 Indicative](/materials/srps/c-4150 "SRPS Č.4150") HRN Croatia · 1 - [Č4150 Indicative](/materials/srps/c-4150 "HRN Č4150") PN Poland · 1 - [NC11 Indicative](/materials/pn/nc11 "PN NC11") ÖNORM Austria · 1 - [K100 Indicative](/materials/onorm/k100 "ÖNORM K100") KS South Korea · 1 - [STD1 Indicative](/materials/ks/std1 "KS STD1") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Cr C Mn Iron — the balance, never listed by a standard — 85.1 % Cr — 12 % C — 2.1 % Mn — 0.4 % Traces & impurities · 0.4 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1.9–2.2 — Unusual | | Si | 0.1–0.6 | | Mn | 0.2–0.6 | | P | 0.03 | | S | 0.03 | | Cr | 11–13 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 1,90-2,20 | 1.900 | 2.200 | Range | | Si | 0,10-0,60 | 0.100 | 0.600 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 11,0-13,0 | 11.000 | 13.000 | Range | | Mn | 0,20-0,60 | 0.200 | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Mo. ## Physical & mechanical properties Density 7,6 g/cm³ Exact Transformation point Ac1 810 °C Exact Transformation point Ac3 835 °C Exact · Ac3(Acm) Transformation point Ar3 770 °C Exact · Ar3(Arcm) Transformation point Ar1 755 °C 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 3 conditions · 4 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | HB | HRC | |---|---|---| | Annealed | 248 | — | | Quenched and tempered | — | 62 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 248 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 5950-2000 | 255 | 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. ## Heat treatment **GB /T 1299-2025** Single operation Test specimen - Quenching 950–1000 °C Cooling Oil Supply condition - Quenching Test specimen - Annealing Supply condition Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied. Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxMzUyMzE_ "Source: www.caishuku.com") ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.2, a shared category, and a published range for Cr / Mn 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. [X153CrMoV12 1.2379 Cr 11,0-13,0 · Mn 0,20-0,60 - ΔCr 0.00 - ΔMn 0.00 - 42 designations](/materials/din-en/x153crmov12 "X153CrMoV12")[1.2436 1.2436 Cr 11,0-13,0 · Mn 0,30-0,60 - ΔCr 0.00 - ΔMn 0.05 - 31 designations](/materials/material-no/1.2436 "1.2436")[X290Cr12 1.2086 Cr 11,5-12,5 · Mn 0,20-0,40 - ΔCr 0.00 - ΔMn 0.10 - 1 designations](/materials/din-en/x290cr12 "X290Cr12")[X210CrCoW12 1.2884 Cr 11,5-12,5 · Mn 0,20-0,40 - ΔCr 0.00 - ΔMn 0.10 - 1 designations](/materials/din-en/x210crcow12 "X210CrCoW12")[X220CrVMo12-2 1.2378 Cr 12,0-13,0 · Mn 0,25-0,40 - ΔCr 0.50 - ΔMn 0.08 - 1 designations](/materials/din-en/x220crvmo12-2 "X220CrVMo12-2")[X165CrV12 1.2201 Cr 11,0-12,0 · Mn 0,20-0,40 - ΔCr 0.50 - ΔMn 0.10 - 2 designations](/materials/din-en/x165crv12 "X165CrV12") ## 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=c1974115-6266-40ec-924f-90ccf3e7d8b4&designation=2110a69f-305d-4148-97d0-32e43cf23b91 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/x12.pdf "Datasheet as PDF")