--- title: "16223PH — composition, equivalents and standards" description: "16223PH is a designation in ČSN for the grade also listed as 12ChN3A. We list 2 designations recorded for this grade, in the standards GOST and ČSN." canonical: https://steelequivalents.com/materials/csn/16223ph language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/16223ph.md cs: https://steelequivalents.com/cs/materiály/csn/16223ph.md de: https://steelequivalents.com/de/werkstoffe/csn/16223ph.md es: https://steelequivalents.com/es/materiales/csn/16223ph.md fr: https://steelequivalents.com/fr/matériaux/csn/16223ph.md hu: https://steelequivalents.com/hu/anyagok/csn/16223ph.md it: https://steelequivalents.com/it/materiali/csn/16223ph.md nl: https://steelequivalents.com/nl/materialen/csn/16223ph.md pl: https://steelequivalents.com/pl/materiały/csn/16223ph.md pt: https://steelequivalents.com/pt/materiais/csn/16223ph.md ru: https://steelequivalents.com/ru/материалы/csn/16223ph.md tr: https://steelequivalents.com/tr/malzemeler/csn/16223ph.md zh: https://steelequivalents.com/zh/材料/csn/16223ph.md ja: https://steelequivalents.com/ja/材料/csn/16223ph.md ar: https://steelequivalents.com/ar/المواد/csn/16223ph.md ko: https://steelequivalents.com/ko/재료/csn/16223ph.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/16223ph.md hi: https://steelequivalents.com/hi/सामग्री/csn/16223ph.md content_hash: sha256:e0b0775c631ae72b73f31e7986c376b9040b5f5cd0f40aad382b347073555a1c 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/csn/16223ph > Canonical URL: https://steelequivalents.com/materials/csn/16223ph > 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. ČSN · Czechia · 2 designations # 16223PH 16223PH is a designation in ČSN for the grade also listed as 12ChN3A. We list 2 designations recorded for this grade, in the standards GOST and ČSN. - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=1a5fcad1-84c2-4d4f-a972-8c9063b7d4a6&designation=51db80f6-1705-4861-a68d-55bf5ac7baab "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/16223ph.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [GOST 12ChN3A This grade’s own name · 3 grades on that route](/materials/gost/12chn3a "GOST 12ChN3A") ## Also known as 2 designations · 2 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. GOST Russia / CIS · 1 - [12ChN3A This grade’s own name](/materials/gost/12chn3a "GOST 12ChN3A") ČSN Czechia · 1 - **16223PH Indicative** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 12 elements on file · weight % What this alloy is Fe Ni Cr Mn Iron — the balance, never listed by a standard — 94.7 % Ni — 3 % Cr — 0.8 % Mn — 0.4 % Traces & impurities · 1.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.09–0.16 | | Si | 0.17–0.37 | | Mn | 0.3–0.6 | | P | ≤ 0.025 | | S | ≤ 0.025 | | Cr | 0.6–0.9 | | Mo | ≤ 0.15 | | Ni | 2.75–3.15 | | V | ≤ 0.05 | | W | ≤ 0.2 | | Cu | ≤ 0.3 | | Ti | ≤ 0.03 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Tungsten Copper Titanium 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 | 0.09 - 0.16 | 0.090 | 0.160 | Range | | Si | 0.17 - 0.37 | 0.170 | 0.370 | Range | | P | \<0.025 | — | 0.025 | Max | | S | \<0.025 | — | 0.025 | Max | | Ti | \<0.03 | — | 0.030 | Max | | V | \<0.05 | — | 0.050 | Max | | Cr | 0.6 - 0.9 | 0.600 | 0.900 | Range | | Mn | 0.3 - 0.6 | 0.300 | 0.600 | Range | | Ni | 2.75 - 3.15 | 2.750 | 3.150 | Range | | Cu | \<0.30 | — | 0.300 | Max | | Mo | \<0.15 | — | 0.150 | Max | | W | \<0.20 | — | 0.200 | Max | 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 computed from composition · °C Predicted Ae3 776 °C Predicted Ae1 698 °C Predicted Acm 403 °C Predicted Bs 523 °C These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either. ## Physical & mechanical properties 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. ## 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=1a5fcad1-84c2-4d4f-a972-8c9063b7d4a6&designation=51db80f6-1705-4861-a68d-55bf5ac7baab "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/16223ph.pdf "Datasheet as PDF")