--- title: "SPHE-AK — Unalloyed structural steels" description: "SPHE-AK in JIS: material number 1.0335, also listed as DD 13. Category: Unalloyed structural steels. Designations recorded for this grade: 20." canonical: https://steelequivalents.com/materials/jis/sphe-ak language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/sphe-ak.md cs: https://steelequivalents.com/cs/materiály/jis/sphe-ak.md de: https://steelequivalents.com/de/werkstoffe/jis/sphe-ak.md es: https://steelequivalents.com/es/materiales/jis/sphe-ak.md fr: https://steelequivalents.com/fr/matériaux/jis/sphe-ak.md hu: https://steelequivalents.com/hu/anyagok/jis/sphe-ak.md it: https://steelequivalents.com/it/materiali/jis/sphe-ak.md nl: https://steelequivalents.com/nl/materialen/jis/sphe-ak.md pl: https://steelequivalents.com/pl/materiały/jis/sphe-ak.md pt: https://steelequivalents.com/pt/materiais/jis/sphe-ak.md ru: https://steelequivalents.com/ru/материалы/jis/sphe-ak.md tr: https://steelequivalents.com/tr/malzemeler/jis/sphe-ak.md zh: https://steelequivalents.com/zh/材料/jis/sphe-ak.md ja: https://steelequivalents.com/ja/材料/jis/sphe-ak.md ar: https://steelequivalents.com/ar/المواد/jis/sphe-ak.md ko: https://steelequivalents.com/ko/재료/jis/sphe-ak.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/sphe-ak.md hi: https://steelequivalents.com/hi/सामग्री/jis/sphe-ak.md content_hash: sha256:556376cfd4e65cf2d5e803b1acf531d962789be08d927de6cab3395f35f0fd0c 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/jis/sphe-ak > Canonical URL: https://steelequivalents.com/materials/jis/sphe-ak > 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. JIS · Japan · 20 designations # SPHE-AK SPHE-AK is a designation in JIS for the material held under material number 1.0335, also listed as DD 13. It is a material in the category Unalloyed structural steels. We list 20 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GOST, UNI, ČSN, AS / NZS and KS. - [*Material no.* **1.0335**](/materials/material-no/1.0335 "Material no.: 1.0335") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **20** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=bc95b3b8-fb94-48d3-b314-9e611d7618e0&designation=dfcf9da3-03f6-436b-a616-83d870ea4ae1 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/sphe-ak.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN DD 13 This grade’s own name](/materials/din-en/dd13 "DIN / EN DD 13") - [UNS G10060 This grade’s own name · 4 grades on that route](/materials/uns/g10060 "UNS G10060") - [AISI / SAE 1006 This grade’s own name · 4 grades on that route](/materials/aisi-sae/1006 "AISI / SAE 1006") - [KS SPHE This grade’s own name · 2 grades on that route](/materials/ks/sphe "KS SPHE") ## About Unalloyed structural steels Unalloyed structural steels include all low-carbon steels in which the iron companions do not exceed specified minimum values. The yield strength, formability and weldability are the decisive factors for their use. They are soft, pliable, tough and stretchy, but cannot be hardened by heat treatment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 20 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 · 3 - [DD 13 This grade’s own name](/materials/din-en/dd13 "DIN / EN DD 13") - [DS Indicative](/materials/gost/ds "DIN / EN DS") - [StW 24 This grade’s own name](/materials/din-en/stw-24 "DIN / EN StW 24") UNS United States · 1 - [G10060 This grade’s own name](/materials/uns/g10060 "UNS G10060") AISI / SAE United States · 3 - [1006 This grade’s own name](/materials/aisi-sae/1006 "AISI / SAE 1006") - [A622DQ Indicative](/materials/aisi-sae/a622dq "AISI / SAE A622DQ") - [DS Indicative](/materials/gost/ds "AISI / SAE DS") BS United Kingdom · 1 - [HR1 Indicative](/materials/is/hr1 "BS HR1") AFNOR France · 1 - [3C Indicative](/materials/afnor/3c "AFNOR 3C") UNE Spain · 1 - [AP13 Indicative](/materials/une/ap13 "UNE AP13") ISO International · 1 - [HR4 Indicative](/materials/is/hr4 "ISO HR4") JIS Japan · 2 - [SPHE Indicative](/materials/ks/sphe "JIS SPHE") - **SPHE-AK Indicative** GOST Russia / CIS · 1 - [08kp Indicative](/materials/gost/08kp "GOST 08kp") UNI Italy · 1 - [FeP13 Indicative](/materials/uni/fep13 "UNI FeP13") ČSN Czechia · 3 - [11304 Indicative](/materials/csn/11304 "ČSN 11304") - [11305 Indicative](/materials/csn/11305 "ČSN 11305") - [11330 Indicative](/materials/csn/11330 "ČSN 11330") AS / NZS Australia / New Zealand · 1 - [1006 Indicative](/materials/aisi-sae/1006 "AS / NZS 1006") KS South Korea · 1 - [SPHE This grade’s own name](/materials/ks/sphe "KS SPHE") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 4 elements on file · weight % What this alloy is Fe Mn C P Iron — the balance, never listed by a standard — 99.5 % Mn — 0.4 % C — 0.1 % P — 0 % Traces & impurities · 0 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.08 | | Mn | ≤ 0.4 | | P | 0.03 | | S | 0.03 | Carbon Manganese Phosphorus Sulfur 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 | — | 0.080 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | ≤0,40 | — | 0.400 | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: Si, Ni, Cr, Mo. ## 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 4 conditions · 15 values By thickness**no delivery state stated** source `steelnumber` | Thickness mm | ReH N/mm² | A80% · Lo = 80 mm | A% · Lo = 5,65 √So | |---|---|---|---| | 1 – 2 | 170 – 330 | — | — | | 1 – 1.5 | — | 27 | — | | 1.5 – 2 | — | 28 | — | | 2 – 11 | 170 – 310 | — | — | | 2 – 3 | — | 29 | — | | 3 – 11 | — | — | 33 | By delivery state**no delivery state stated** source `steelks` | Delivery state | Rm N/mm² | A% | |---|---|---| | Plate/Sheet | 270 | 31 – 41 | By delivery state**no delivery state stated** source `steeljis` | Delivery state | Rm N/mm² | A% | |---|---|---| | Plate/Sheet Hot-rolled | 270 | 31 – 41 | By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Blank for pipe | 638 | 373 | 16 | 40 | 390 | 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=bc95b3b8-fb94-48d3-b314-9e611d7618e0&designation=dfcf9da3-03f6-436b-a616-83d870ea4ae1 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/sphe-ak.pdf "Datasheet as PDF")