--- title: "1501Gr.161-400 — Heat-resistant structural steels" description: "1501Gr.161-400 in BS: material number 1.0425, also listed as H II. Category: Heat-resistant structural steels. Designations recorded for this grade: 79." canonical: https://steelequivalents.com/materials/bs/1501gr-161-400 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/bs/1501gr-161-400.md cs: https://steelequivalents.com/cs/materiály/bs/1501gr-161-400.md de: https://steelequivalents.com/de/werkstoffe/bs/1501gr-161-400.md es: https://steelequivalents.com/es/materiales/bs/1501gr-161-400.md fr: https://steelequivalents.com/fr/matériaux/bs/1501gr-161-400.md hu: https://steelequivalents.com/hu/anyagok/bs/1501gr-161-400.md it: https://steelequivalents.com/it/materiali/bs/1501gr-161-400.md nl: https://steelequivalents.com/nl/materialen/bs/1501gr-161-400.md pl: https://steelequivalents.com/pl/materiały/bs/1501gr-161-400.md pt: https://steelequivalents.com/pt/materiais/bs/1501gr-161-400.md ru: https://steelequivalents.com/ru/материалы/bs/1501gr-161-400.md tr: https://steelequivalents.com/tr/malzemeler/bs/1501gr-161-400.md zh: https://steelequivalents.com/zh/材料/bs/1501gr-161-400.md ja: https://steelequivalents.com/ja/材料/bs/1501gr-161-400.md ar: https://steelequivalents.com/ar/المواد/bs/1501gr-161-400.md ko: https://steelequivalents.com/ko/재료/bs/1501gr-161-400.md pt-br: https://steelequivalents.com/pt-br/materiais/bs/1501gr-161-400.md hi: https://steelequivalents.com/hi/सामग्री/bs/1501gr-161-400.md content_hash: sha256:eee00191633944934a5b7014c623755e4ea6280cd832496a10eded12b939ced6 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/bs/1501gr-161-400 > Canonical URL: https://steelequivalents.com/materials/bs/1501gr-161-400 > 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. BS · United Kingdom · 79 designations # 1501Gr.161-400 1501Gr.161-400 is a designation in BS for the material held under material number 1.0425, also listed as H II. It is a material in the category Heat-resistant structural steels. We list 79 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, JIS, GOST, UNI, SS, ČSN, STN, PN, MSZ, STAS, BDS, ÖNORM, NBN and KS. - [*Material no.* **1.0425**](/materials/material-no/1.0425 "Material no.: 1.0425") - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - *Designations* **79** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=c6395e7d-d5f4-4365-aad3-583a6fe99413&designation=c4a0daf2-4f0e-49f8-8eaf-6c677ace65b0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/1501gr-161-400.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN H II This grade’s own name · 2 grades on that route](/materials/din-en/hii "DIN / EN H II") - [UNS K01701 This grade’s own name · 6 grades on that route](/materials/uns/k01701 "UNS K01701") - [ASTM A515 Grade 60 This grade’s own name](/materials/din-en/a515-grade-60 "ASTM A515 Grade 60") ## About Heat-resistant structural steels Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 79 designations · 21 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 · 5 - [1.0425 Indicative](/materials/material-no/1.0425 "DIN / EN 1.0425") - [Gr.A Indicative](/materials/aisi-sae/gr-a "DIN / EN Gr.A") - [H II This grade’s own name](/materials/din-en/hii "DIN / EN H II") - [P265GH This grade’s own name](/materials/din-en/p265gh "DIN / EN P265GH") - [St45.8 Indicative](/materials/din-en/st45-8 "DIN / EN St45.8") UNS United States · 5 - [K01701 This grade’s own name](/materials/uns/k01701 "UNS K01701") - [K02402 This grade’s own name](/materials/uns/k02402 "UNS K02402") - [K02505 This grade’s own name](/materials/uns/k02505 "UNS K02505") - [K02704 This grade’s own name](/materials/uns/k02704 "UNS K02704") - [K02801 This grade’s own name](/materials/uns/k02801 "UNS K02801") AISI / SAE United States · 8 - [A414E Indicative](/materials/aisi-sae/a414e "AISI / SAE A414E") - [A516Gr.60 Indicative](/materials/aisi-sae/a516gr-60 "AISI / SAE A516Gr.60") - [Gr.A Indicative](/materials/aisi-sae/gr-a "AISI / SAE Gr.A") - [K01701 Indicative](/materials/uns/k01701 "AISI / SAE K01701") - [K02100 Indicative](/materials/uns/k02100 "AISI / SAE K02100") - [K02401 Indicative](/materials/uns/k02401 "AISI / SAE K02401") - [K02402 Indicative](/materials/uns/k02402 "AISI / SAE K02402") - [K02505 Indicative](/materials/uns/k02505 "AISI / SAE K02505") ASTM United States · 2 - [A515 Grade 60 This grade’s own name](/materials/din-en/a515-grade-60 "ASTM A515 Grade 60") - [A516 This grade’s own name](/materials/astm/a516 "ASTM A516") BS United Kingdom · 9 - **1501Gr.161-400 Indicative** - [151-400 Indicative](/materials/bs/151-400 "BS 151-400") - [154-400 Indicative](/materials/bs/154-400 "BS 154-400") - [161-400 Indicative](/materials/bs/161-400 "BS 161-400") - [161-430 Indicative](/materials/bs/161-430 "BS 161-430") - [161Gr.400 Indicative](/materials/bs/161gr-400 "BS 161Gr.400") - [164Gr.400 Indicative](/materials/bs/164gr-400 "BS 164Gr.400") - [244Gr.400 Indicative](/materials/bs/244gr-400 "BS 244Gr.400") - [P269GH Indicative](/materials/uni/p269gh "BS P269GH") AFNOR France · 5 - [A42AP Indicative](/materials/afnor/a42ap "AFNOR A42AP") - [A42CP Indicative](/materials/afnor/a42cp "AFNOR A42CP") - [A42F Indicative](/materials/afnor/a42f "AFNOR A42F") - [AP Indicative](/materials/afnor/ap "AFNOR AP") - [P265GH Indicative](/materials/din-en/p265gh "AFNOR P265GH") UNE Spain · 4 - [A42 Indicative](/materials/une/a42 "UNE A42") - [A42 RC 1 Indicative](/materials/une/a42-rc-1 "UNE A42 RC 1") - [A42RCI Indicative](/materials/une/a42rci "UNE A42RCI") - [A42RCII Indicative](/materials/une/a42rcii "UNE A42RCII") ISO International · 2 - [F5 Indicative](/materials/iso/f5 "ISO F5") - [F7 Indicative](/materials/iso/f7 "ISO F7") JIS Japan · 8 - [SG295 Indicative](/materials/jis/sg295 "JIS SG295") - [SG30 Indicative](/materials/jis/sg30 "JIS SG30") - [SGV410 Indicative](/materials/jis/sgv410 "JIS SGV410") - [SGV450 Indicative](/materials/jis/sgv450 "JIS SGV450") - [SGV480 Indicative](/materials/jis/sgv480 "JIS SGV480") - [SPV235 Indicative](/materials/jis/spv235 "JIS SPV235") - [SPV315 Indicative](/materials/jis/spv315 "JIS SPV315") - [SPV355 Indicative](/materials/jis/spv355 "JIS SPV355") GOST Russia / CIS · 3 - [16K Indicative](/materials/gost/16k "GOST 16K") - [16К Indicative](/materials/gost/16k "GOST 16К") - [20K Indicative](/materials/gost/20k "GOST 20K") UNI Italy · 8 - [Fe410-1KW Indicative](/materials/uni/fe410-1kw "UNI Fe410-1KW") - [Fe4101KG Indicative](/materials/uni/fe4101kg "UNI Fe4101KG") - [Fe4101KT Indicative](/materials/uni/fe4101kt "UNI Fe4101KT") - [Fe410KG Indicative](/materials/uni/fe410kg "UNI Fe410KG") - [Fe410KT Indicative](/materials/uni/fe410kt "UNI Fe410KT") - [Fe410KW Indicative](/materials/uni/fe410kw "UNI Fe410KW") - [P265GH Indicative](/materials/din-en/p265gh "UNI P265GH") - [P269GH Indicative](/materials/uni/p269gh "UNI P269GH") 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 · 2 - [11416 Indicative](/materials/csn/11416 "ČSN 11416") - [11418 Indicative](/materials/csn/11418 "ČSN 11418") STN Slovakia · 1 - [11 418 Indicative](/materials/csn/11418 "STN 11 418") PN Poland · 3 - [St36K Indicative](/materials/pn/st36k "PN St36K") - [St41K Indicative](/materials/pn/st41k "PN St41K") - [St44K Indicative](/materials/pn/st44k "PN St44K") MSZ Hungary · 3 - [KL2 Indicative](/materials/msz/kl2 "MSZ KL2") - [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 - [D42-1 Indicative](/materials/nbn/d42-1 "NBN D42-1") KS South Korea · 2 - [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 14 elements on file · weight % What this alloy is Fe Mn Si Cr Iron — the balance, never listed by a standard — 97.2 % Mn — 1.1 % Si — 0.4 % Cr — 0.3 % Traces & impurities · 1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.2 | | Si | ≤ 0.4 | | Mn | 0.8–1.4 | | P | 0.025 | | S | 0.01 | | Cr | ≤ 0.3 | | Mo | ≤ 0.08 | | Ni | ≤ 0.3 | | V | ≤ 0.02 | | Cu | ≤ 0.3 | | Al | ≥ 0.02 | | Ti | ≤ 0.03 | | Nb | ≤ 0.02 | | N | 0.012 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Copper Aluminium Titanium Niobium Nitrogen 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 | ≤0,20 | — | 0.200 | Max | | N | 0,012 | 0.012 | 0.012 | Exact | | Al | ≥0,020 | 0.020 | — | Min | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,01 | 0.010 | 0.010 | Exact | | Ti | ≤0,03 | — | 0.030 | Max | | V | ≤0,02 | — | 0.020 | Max | | Cr | ≤0,30 | — | 0.300 | Max | | Mn | 0,80-1,40 | 0.800 | 1.400 | Range | | Ni | ≤0,30 | — | 0.300 | Max | | Cu | ≤0,30 | — | 0.300 | Max | | Nb | ≤0,02 | — | 0.020 | 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 811 °C Predicted Ae1 715 °C Predicted Acm 435 °C Predicted Bs 558 °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 Transformation point Ac1 724 °C Exact Transformation point Ac3 845 °C Exact · Ac3(Acm) Transformation point Ar3 817 °C Exact · Ar3(Arcm) Transformation point Ar1 682 °C Exact Weldability readily weldable As published: without limitations. Flake sensitivity not susceptible As published: not predisposed Temper brittleness not susceptible As published: not predisposed 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 2 conditions · 60 values By delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | Re N/mm² | A5% | KCU kJ/m² | |---|---|---|---|---| | Sheet, GOST 5520-79 | 400 – 510 | 225 – 245 | 23 – 25 | 490 – 590 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal expansion coefficient 10^-6/K | Thermal conductivity W/(m·K) | Specific heat capacity J/(kg·K) | Electrical resistivity nΩ·m | |---|---|---|---|---|---|---| | 20 | 7.87 | 211 | — | — | 482 | 200 | | 100 | 7.84 | 208 | — | 51 | 486 | 219 | | 200 | 7.81 | 205 | 12 | 49 | 498 | 292 | | 300 | 7.78 | 200 | 12.8 | 46 | 514 | 381 | | 400 | 7.74 | 191 | 13.2 | 42 | 533 | 487 | | 500 | 7.71 | 180 | 13.6 | 39 | 555 | 601 | | 600 | 7.67 | 165 | 13.85 | 36 | 584 | 758 | | 700 | 7.63 | — | — | — | 636 | 925 | | 800 | 7.64 | — | — | — | 703 | 1094 | | 900 | 7.61 | — | — | — | 703 | 1135 | | 1000 | 7.55 | — | — | — | 695 | 1167 | | 1100 | 7.49 | — | — | — | 691 | 1194 | | 1200 | — | — | — | — | 687 | 1219 | 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 1.0, a shared category, and a published range for Mn / Si 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. [1.0436 1.0481 Mn 0,90-1,50 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 83 designations](/materials/material-no/1.0436 "1.0436")[P285NH 1.0477 Mn 0,60-1,40 · Si ≤0,40 - ΔMn 0.10 - ΔSi 0.00 - 3 designations](/materials/din-en/p285nh "P285NH")[1.0345 1.0345 Mn 0,60-1,20 · Si ≤0,35 - ΔMn 0.20 - ΔSi 0.03 - 62 designations](/materials/material-no/1.0345 "1.0345")[19Mn5 1.0482 Mn 1,00-1,30 · Si 0,30-0,60 - ΔMn 0.05 - ΔSi 0.25 - 9 designations](/materials/din-en/19mn5 "19Mn5")[19Mn6 1.0473 Mn 1,00-1,70 · Si ≤0,60 - ΔMn 0.25 - ΔSi 0.10 - 26 designations](/materials/din-en/19mn6 "19Mn6")[21Mn6 1.0485 Mn 1,15-1,60 · Si ≤0,60 - ΔMn 0.27 - ΔSi 0.10 - 4 designations](/materials/din-en/21mn6 "21Mn6") ## 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=c6395e7d-d5f4-4365-aad3-583a6fe99413&designation=c4a0daf2-4f0e-49f8-8eaf-6c677ace65b0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/1501gr-161-400.pdf "Datasheet as PDF")