--- title: "D42-2 — Aging resistant steels" description: "D42-2 in NBN: material number 1.0426, also listed as P280GH. Category: Aging resistant steels. Designations recorded for this grade: 56." canonical: https://steelequivalents.com/materials/nbn/d42-2 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/nbn/d42-2.md cs: https://steelequivalents.com/cs/materiály/nbn/d42-2.md de: https://steelequivalents.com/de/werkstoffe/nbn/d42-2.md es: https://steelequivalents.com/es/materiales/nbn/d42-2.md fr: https://steelequivalents.com/fr/matériaux/nbn/d42-2.md hu: https://steelequivalents.com/hu/anyagok/nbn/d42-2.md it: https://steelequivalents.com/it/materiali/nbn/d42-2.md nl: https://steelequivalents.com/nl/materialen/nbn/d42-2.md pl: https://steelequivalents.com/pl/materiały/nbn/d42-2.md pt: https://steelequivalents.com/pt/materiais/nbn/d42-2.md ru: https://steelequivalents.com/ru/материалы/nbn/d42-2.md tr: https://steelequivalents.com/tr/malzemeler/nbn/d42-2.md zh: https://steelequivalents.com/zh/材料/nbn/d42-2.md ja: https://steelequivalents.com/ja/材料/nbn/d42-2.md ar: https://steelequivalents.com/ar/المواد/nbn/d42-2.md ko: https://steelequivalents.com/ko/재료/nbn/d42-2.md pt-br: https://steelequivalents.com/pt-br/materiais/nbn/d42-2.md hi: https://steelequivalents.com/hi/सामग्री/nbn/d42-2.md content_hash: sha256:2ddbaf90f44eae36ea3e70a6adc8a57e43776501d8858f326c10ef8ab913af86 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/nbn/d42-2 > Canonical URL: https://steelequivalents.com/materials/nbn/d42-2 > 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. NBN · Belgium · 56 designations # D42-2 D42-2 is a designation in NBN for the material held under material number 1.0426, also listed as P280GH. It is a material in the category Aging resistant steels. We list 56 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GOST, UNI, SS, ČSN, PN, MSZ, STAS, BDS, ÖNORM, NBN and KS. - [*Material no.* **1.0426**](/materials/material-no/1.0426 "Material no.: 1.0426") - [*Category* **Aging resistant steels · 2 grades**](/categories/aging-resistant-steels "Category: Aging resistant steels · 2 grades") - *Designations* **56** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=44caeac7-75ea-482e-8943-65b7bbc51d82&designation=bc82cb48-fbae-48bf-b339-d3a54e63c595 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/nbn/d42-2.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN P280GH This grade’s own name](/materials/din-en/p280gh "DIN / EN P280GH") - [UNS K01701 This grade’s own name · 6 grades on that route](/materials/uns/k01701 "UNS K01701") - [KS SM53C This grade’s own name](/materials/ks/sm53c "KS SM53C") ## About Aging resistant steels Aging-resistant steel is formulated to limit changes in its mechanical properties during storage and service. Its stable behavior over time makes it suitable for structural and formed components where consistent performance is important. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 56 designations · 18 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 - [P280GH This grade’s own name](/materials/din-en/p280gh "DIN / EN P280GH") UNS United States · 3 - [K01701 This grade’s own name](/materials/uns/k01701 "UNS K01701") - [K02100 This grade’s own name](/materials/uns/k02100 "UNS K02100") - [K02402 This grade’s own name](/materials/uns/k02402 "UNS K02402") AISI / SAE United States · 7 - [Gr.60 Indicative](/materials/aisi-sae/gr-60 "AISI / SAE Gr.60") - [K01701 Indicative](/materials/uns/k01701 "AISI / SAE K01701") - [K02401 Indicative](/materials/uns/k02401 "AISI / SAE K02401") - [K02402 Indicative](/materials/uns/k02402 "AISI / SAE K02402") - [K02505 Indicative](/materials/uns/k02505 "AISI / SAE K02505") - [K02801 Indicative](/materials/uns/k02801 "AISI / SAE K02801") - [X42 Indicative](/materials/aisi-sae/x42 "AISI / SAE X42") BS United Kingdom · 6 - [1501Gr.164-360 Indicative](/materials/bs/1501gr-164-360 "BS 1501Gr.164-360") - [151-400 Indicative](/materials/bs/151-400 "BS 151-400") - [161-430 Indicative](/materials/bs/161-430 "BS 161-430") - [164-360 Indicative](/materials/bs/164-360 "BS 164-360") - [400-22 Indicative](/materials/bs/400-22 "BS 400-22") - [P265GH Indicative](/materials/din-en/p265gh "BS P265GH") AFNOR France · 4 - [A42AP Indicative](/materials/afnor/a42ap "AFNOR A42AP") - [A42CP Indicative](/materials/afnor/a42cp "AFNOR A42CP") - [A42F Indicative](/materials/afnor/a42f "AFNOR A42F") - [P265GH Indicative](/materials/din-en/p265gh "AFNOR P265GH") UNE Spain · 2 - [A42RCI Indicative](/materials/une/a42rci "UNE A42RCI") - [A42RCII Indicative](/materials/une/a42rcii "UNE A42RCII") JIS Japan · 8 - [SG295 Indicative](/materials/jis/sg295 "JIS SG295") - [SGV410 Indicative](/materials/jis/sgv410 "JIS SGV410") - [SGV450 Indicative](/materials/jis/sgv450 "JIS SGV450") - [SGV480 Indicative](/materials/jis/sgv480 "JIS SGV480") - [SM53B Indicative](/materials/jis/sm53b "JIS SM53B") - [SM53C Indicative](/materials/ks/sm53c "JIS SM53C") - [SPV235 Indicative](/materials/jis/spv235 "JIS SPV235") - [SPV315 Indicative](/materials/jis/spv315 "JIS SPV315") GOST Russia / CIS · 2 - [20K Indicative](/materials/gost/20k "GOST 20K") - [20К Indicative](/materials/gost/20k "GOST 20К") UNI Italy · 4 - [Fe4102KG Indicative](/materials/uni/fe410-2kg "UNI Fe4102KG") - [Fe4102KW Indicative](/materials/uni/fe410-2kw "UNI Fe4102KW") - [Fe410KW Indicative](/materials/uni/fe410kw "UNI Fe410KW") - [P265GH Indicative](/materials/din-en/p265gh "UNI P265GH") SS Sweden · 3 - [1430 Indicative](/materials/ss/1430 "SS 1430") - [1431 Indicative](/materials/ss/1431 "SS 1431") - [1432 Indicative](/materials/ss/1432 "SS 1432") ČSN Czechia · 3 - [11 418 Indicative](/materials/csn/11418 "ČSN 11 418") - [11416 Indicative](/materials/csn/11416 "ČSN 11416") - [11431 Indicative](/materials/csn/11431 "ČSN 11431") PN Poland · 2 - [St3M Indicative](/materials/pn/st3m "PN St3M") - [St41K Indicative](/materials/pn/st41k "PN St41K") MSZ Hungary · 2 - [KL2C Indicative](/materials/msz/kl2c "MSZ KL2C") - [P265GH Indicative](/materials/din-en/p265gh "MSZ P265GH") STAS Romania · 2 - [K410 Indicative](/materials/stas/k410 "STAS K410") - [OL44.3 Indicative](/materials/stas/ol44-3 "STAS OL44.3") BDS Bulgaria · 2 - [16K Indicative](/materials/gost/16k "BDS 16K") - [P265GH Indicative](/materials/din-en/p265gh "BDS P265GH") ÖNORM Austria · 1 - [St41KW Indicative](/materials/onorm/st41kw "ÖNORM St41KW") NBN Belgium · 1 - **D42-2 Indicative** KS South Korea · 3 - [SM53C This grade’s own name](/materials/ks/sm53c "KS SM53C") - [SPPV315 Indicative](/materials/ks/sppv315 "KS SPPV315") - [SPPV355 Indicative](/materials/ks/sppv355 "KS SPPV355") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 11 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 97.2 % Mn — 1.2 % Si — 0.4 % Cr — 0.3 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.08–0.2 | | Si | ≤ 0.4 | | Mn | 0.9–1.5 | | P | 0.025 | | S | 0.015 | | Cr | ≤ 0.3 | | Mo | ≤ 0.08 | | Ni | ≤ 0.3 | | V | ≤ 0.02 | | Cu | ≤ 0.3 | | Nb | ≤ 0.01 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper Niobium 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 | 0,08-0,20 | 0.080 | 0.200 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | V | ≤0,02 | — | 0.020 | Max | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | 0,90-1,50 | 0.900 | 1.500 | Range | | Ni | ≤0,30 | — | 0.300 | Max | | Cu | ≤0,30 | — | 0.300 | Max | | Nb | ≤0,01 | — | 0.010 | Max | | Mo | ≤0,08 | — | 0.080 | 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 810 °C Predicted Ae1 714 °C Predicted Acm 436 °C Predicted Bs 555 °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 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. ## Properties by condition 1 conditions · 2 values By thickness**no delivery state stated** source `steelnumber` | Thickness mm | ReH N/mm² | |---|---| | ≤ 35 | 280 | | 35 – 160 | 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. ## 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=44caeac7-75ea-482e-8943-65b7bbc51d82&designation=bc82cb48-fbae-48bf-b339-d3a54e63c595 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/nbn/d42-2.pdf "Datasheet as PDF")