--- title: "STHA26 — composition, equivalents and standards" description: "STHA26: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/ks/stha26 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/ks/stha26.md cs: https://steelequivalents.com/cs/materiály/ks/stha26.md de: https://steelequivalents.com/de/werkstoffe/ks/stha26.md es: https://steelequivalents.com/es/materiales/ks/stha26.md fr: https://steelequivalents.com/fr/matériaux/ks/stha26.md hu: https://steelequivalents.com/hu/anyagok/ks/stha26.md it: https://steelequivalents.com/it/materiali/ks/stha26.md nl: https://steelequivalents.com/nl/materialen/ks/stha26.md pl: https://steelequivalents.com/pl/materiały/ks/stha26.md pt: https://steelequivalents.com/pt/materiais/ks/stha26.md ru: https://steelequivalents.com/ru/материалы/ks/stha26.md tr: https://steelequivalents.com/tr/malzemeler/ks/stha26.md zh: https://steelequivalents.com/zh/材料/ks/stha26.md ja: https://steelequivalents.com/ja/材料/ks/stha26.md ar: https://steelequivalents.com/ar/المواد/ks/stha26.md ko: https://steelequivalents.com/ko/재료/ks/stha26.md pt-br: https://steelequivalents.com/pt-br/materiais/ks/stha26.md hi: https://steelequivalents.com/hi/सामग्री/ks/stha26.md content_hash: sha256:6b4d45a332a3fe0ee1f74d0a32d2e171b825e487bdf5673de9dac80c9085cb46 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/stha26 > Canonical URL: https://steelequivalents.com/materials/ks/stha26 > 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 # STHA26 STHA26 is a grade designated under KS. Its recorded composition includes C ≤ 0.15%, Si 0.25–1%, Cr 8–10%, Mn 0.3–0.6% and Mo 0.9–1.1%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 420 N/mm², Re 210 N/mm², A 22–30% and HRB 89. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=6083ee84-dfa6-4b9c-9041-6135b59a6aed&designation=cf1fcfd9-bdf1-4428-b99f-5a5ef91d87dd "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/stha26.pdf "Datasheet as PDF") ## Chemical composition 7 elements on file · weight % What this alloy is Fe Cr Mo Si Iron — the balance, never listed by a standard — 88.7 % Cr — 9 % Mo — 1 % Si — 0.6 % Traces & impurities · 0.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.15 | | Si | 0.25–1 | | Mn | 0.3–0.6 | | P | ≤ 0.03 | | S | ≤ 0.03 | | Cr | 8–10 | | Mo | 0.9–1.1 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum 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 0.15 | — | 0.150 | Max | | Si | 0.25 - 1 | 0.250 | 1.000 | Range | | P | max 0.03 | — | 0.030 | Max | | S | max 0.03 | — | 0.030 | Max | | Cr | 8 - 10 | 8.000 | 10.000 | Range | | Mn | 0.3 - 0.6 | 0.300 | 0.600 | Range | | Mo | 0.9 - 1.1 | 0.900 | 1.100 | Range | 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: Ni. ## 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=6083ee84-dfa6-4b9c-9041-6135b59a6aed&designation=cf1fcfd9-bdf1-4428-b99f-5a5ef91d87dd "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/stha26.pdf "Datasheet as PDF")