--- title: "Gr.F — Higher strength steels" description: "Gr.F in AISI / SAE: material number 1.0445, also listed as H300BD. Category: Higher strength steels. Designations recorded for this grade: 17." canonical: https://steelequivalents.com/materials/aisi-sae/gr-f language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/aisi-sae/gr-f.md cs: https://steelequivalents.com/cs/materiály/aisi-sae/gr-f.md de: https://steelequivalents.com/de/werkstoffe/aisi-sae/gr-f.md es: https://steelequivalents.com/es/materiales/aisi-sae/gr-f.md fr: https://steelequivalents.com/fr/matériaux/aisi-sae/gr-f.md hu: https://steelequivalents.com/hu/anyagok/aisi-sae/gr-f.md it: https://steelequivalents.com/it/materiali/aisi-sae/gr-f.md nl: https://steelequivalents.com/nl/materialen/aisi-sae/gr-f.md pl: https://steelequivalents.com/pl/materiały/aisi-sae/gr-f.md pt: https://steelequivalents.com/pt/materiais/aisi-sae/gr-f.md ru: https://steelequivalents.com/ru/материалы/aisi-sae/gr-f.md tr: https://steelequivalents.com/tr/malzemeler/aisi-sae/gr-f.md zh: https://steelequivalents.com/zh/材料/aisi-sae/gr-f.md ja: https://steelequivalents.com/ja/材料/aisi-sae/gr-f.md ar: https://steelequivalents.com/ar/المواد/aisi-sae/gr-f.md ko: https://steelequivalents.com/ko/재료/aisi-sae/gr-f.md pt-br: https://steelequivalents.com/pt-br/materiais/aisi-sae/gr-f.md hi: https://steelequivalents.com/hi/सामग्री/aisi-sae/gr-f.md content_hash: sha256:64b11801b890a3684c4eb77b92fc5a251595f4634a7e2907de14d00f4612b16e 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/aisi-sae/gr-f > Canonical URL: https://steelequivalents.com/materials/aisi-sae/gr-f > 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. AISI / SAE · United States · 17 designations # Gr.F Gr.F is a designation in AISI / SAE for the material held under material number 1.0445, also listed as H300BD. It is a material in the category Higher strength steels. We list 17 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, ISO, JIS, GOST, UNI, ČSN, PN, STAS and BDS. - [*Material no.* **1.0445**](/materials/material-no/1.0445 "Material no.: 1.0445") - [*Category* **Higher strength steels · 20 grades**](/categories/higher-strength-steels "Category: Higher strength steels · 20 grades") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - *Designations* **17** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=6ea75854-b6e2-4fdf-b588-d90e10492e2f&designation=12ab76a7-5ed2-49f2-8313-e80c6e26afeb "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/aisi-sae/gr-f.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN H300BD This grade’s own name · 2 grades on that route](/materials/din-en/h300bd "DIN / EN H300BD") - [UNS K03101 This grade’s own name · 4 grades on that route](/materials/uns/k03101 "UNS K03101") ## About Higher strength steels Higher strength steels are structural materials designed to carry greater loads than conventional structural steels while retaining useful ductility. They are used for load-bearing structures and components where higher strength can support efficient material use and durable fabricated designs. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 17 designations · 13 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 - [H300BD This grade’s own name](/materials/din-en/h300bd "DIN / EN H300BD") - [HX300BD This grade’s own name](/materials/din-en/hx300bd "DIN / EN HX300BD") UNS United States · 2 - [K03101 This grade’s own name](/materials/uns/k03101 "UNS K03101") - [K03102 This grade’s own name](/materials/uns/k03102 "UNS K03102") AISI / SAE United States · 2 - **Gr.F Indicative** - [K01803 Indicative](/materials/uns/k01803 "AISI / SAE K01803") BS United Kingdom · 1 - [223-490 Indicative](/materials/bs/223-490 "BS 223-490") AFNOR France · 1 - [A48CP Indicative](/materials/afnor/a48cp "AFNOR A48CP") ISO International · 1 - [P11 Indicative](/materials/iso/p11 "ISO P11") JIS Japan · 1 - [SLA325A Indicative](/materials/jis/sla325a "JIS SLA325A") GOST Russia / CIS · 2 - [16GS Indicative](/materials/gost/16gs "GOST 16GS") - [16ГС Indicative](/materials/gost/16gs "GOST 16ГС") UNI Italy · 1 - [Fe460-1KG Indicative](/materials/uni/fe460-1kg "UNI Fe460-1KG") ČSN Czechia · 1 - [11474 Indicative](/materials/csn/11474 "ČSN 11474") PN Poland · 1 - [15GA Indicative](/materials/pn/15ga "PN 15GA") STAS Romania · 1 - [16SiMn4 Indicative](/materials/stas/16simn4 "STAS 16SiMn4") BDS Bulgaria · 1 - [16GS Indicative](/materials/gost/16gs "BDS 16GS") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: C, Mn, Si, Ni, Cr, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact Transformation point Ac1 736 °C Exact Transformation point Ac3 920 °C Exact · Ac3(Acm) Transformation point Ar3 791 °C Exact · Ar3(Arcm) Transformation point Ar1 641 °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 3 conditions · 25 values By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Ø 325 x 30 | 480 | 280 | 28 | 57 | 1000 | | Ø 325 x 30 | 480 | 260 | 27 | 65 | 1200 | 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 | 450 – 490 | 275 – 325 | 21 | 590 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal expansion coefficient 10^-6/K | Specific heat capacity J/(kg·K) | |---|---|---|---|---| | 20 | 7.85 | — | — | — | | 100 | — | — | 13 | 470 | | 200 | — | — | 14 | — | | 300 | — | 181 | 15.3 | — | | 400 | — | 172 | 16.2 | — | | 500 | — | 162 | 16.1 | — | | 600 | — | — | 16.2 | — | 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=6ea75854-b6e2-4fdf-b588-d90e10492e2f&designation=12ab76a7-5ed2-49f2-8313-e80c6e26afeb "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/aisi-sae/gr-f.pdf "Datasheet as PDF")