--- title: "SPE — composition, equivalents and standards" description: "SPE: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/ks/spe language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/ks/spe.md cs: https://steelequivalents.com/cs/materiály/ks/spe.md de: https://steelequivalents.com/de/werkstoffe/ks/spe.md es: https://steelequivalents.com/es/materiales/ks/spe.md fr: https://steelequivalents.com/fr/matériaux/ks/spe.md hu: https://steelequivalents.com/hu/anyagok/ks/spe.md it: https://steelequivalents.com/it/materiali/ks/spe.md nl: https://steelequivalents.com/nl/materialen/ks/spe.md pl: https://steelequivalents.com/pl/materiały/ks/spe.md pt: https://steelequivalents.com/pt/materiais/ks/spe.md ru: https://steelequivalents.com/ru/материалы/ks/spe.md tr: https://steelequivalents.com/tr/malzemeler/ks/spe.md zh: https://steelequivalents.com/zh/材料/ks/spe.md ja: https://steelequivalents.com/ja/材料/ks/spe.md ar: https://steelequivalents.com/ar/المواد/ks/spe.md ko: https://steelequivalents.com/ko/재료/ks/spe.md pt-br: https://steelequivalents.com/pt-br/materiais/ks/spe.md hi: https://steelequivalents.com/hi/सामग्री/ks/spe.md content_hash: sha256:1fb3ecea1f334b06eb5577cedf4d1d6ba634cc5fd8847063260883742ee00de1 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/ks/spe > Canonical URL: https://steelequivalents.com/materials/ks/spe > 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. KS · South Korea · 1 designation # SPE SPE is a grade designated under KS. Its recorded composition includes C ≤ 0.008%, P ≤ 0.04%, S ≤ 0.04% and Mn ≤ 0.5%. No cross-standard equivalents are recorded for this grade yet. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f34760a1-5115-4172-92b1-65bf363e6ec9&designation=9b4c23e6-3402-4f89-b26b-50e060e6d7af "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/spe.pdf "Datasheet as PDF") ## Chemical composition 4 elements on file · weight % What this alloy is Fe Mn P S Iron — the balance, never listed by a standard — 99.4 % Mn — 0.5 % P — 0 % S — 0 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.008 | | Mn | ≤ 0.5 | | P | ≤ 0.04 | | S | ≤ 0.04 | 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 | max 0.008 | — | 0.008 | Max | | P | max 0.04 | — | 0.040 | Max | | S | max 0.04 | — | 0.040 | Max | | Mn | max 0.5 | — | 0.500 | 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 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=f34760a1-5115-4172-92b1-65bf363e6ec9&designation=9b4c23e6-3402-4f89-b26b-50e060e6d7af "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/spe.pdf "Datasheet as PDF")