---
title: "SK5 — 5 equivalent grades, compared"
description: "The designation SK5 is carried by 5 different grades. Compare them on the elements that actually differ, then open the one your print means."
canonical: https://steelequivalents.com/materials/jis/sk5
language: en
robots: index, follow
og_type: website
type: material-detail
language_alternates:
  en: https://steelequivalents.com/materials/jis/sk5.md
  cs: https://steelequivalents.com/cs/materiály/jis/sk5.md
  de: https://steelequivalents.com/de/werkstoffe/jis/sk5.md
  es: https://steelequivalents.com/es/materiales/jis/sk5.md
  fr: https://steelequivalents.com/fr/matériaux/jis/sk5.md
  hu: https://steelequivalents.com/hu/anyagok/jis/sk5.md
  it: https://steelequivalents.com/it/materiali/jis/sk5.md
  nl: https://steelequivalents.com/nl/materialen/jis/sk5.md
  pl: https://steelequivalents.com/pl/materiały/jis/sk5.md
  pt: https://steelequivalents.com/pt/materiais/jis/sk5.md
  ru: https://steelequivalents.com/ru/материалы/jis/sk5.md
  tr: https://steelequivalents.com/tr/malzemeler/jis/sk5.md
  zh: https://steelequivalents.com/zh/材料/jis/sk5.md
  ja: https://steelequivalents.com/ja/材料/jis/sk5.md
  ar: https://steelequivalents.com/ar/المواد/jis/sk5.md
  ko: https://steelequivalents.com/ko/재료/jis/sk5.md
  pt-br: https://steelequivalents.com/pt-br/materiais/jis/sk5.md
  hi: https://steelequivalents.com/hi/सामग्री/jis/sk5.md
content_hash: sha256:ea78f954f6a80be0f5f169bcb30e0e60232a83c978294bb0c602f006098098a9
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/jis/sk5
> Canonical URL: https://steelequivalents.com/materials/jis/sk5
> 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 · 5 grades

# SK5

The designation SK5 is carried by 5 different grades. Compare them on the elements that actually differ, then open the one your print means.

- *Matching grades* **5**
- [*Category* **Unalloyed tool steels / carbon steels · 35 grades**](/categories/unalloyed-tool-steels-carbon-steels "Category: Unalloyed tool steels / carbon steels · 35 grades")

[Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry")

## Which of the 5 do you want?

This name is carried by several grades. The elements shown are the ones whose values actually differ across the set — the ones that decide the question. Values are the source text verbatim; an em dash means no value on file for that element on that grade, not zero.

| Grade | Material no. | Category | Designations | C% | Mn% | Si% | P% | S% |
|---|---|---|---|---|---|---|---|---|
| [C80U](/materials/din-en/c80u "C80U") | [1.1525](/materials/material-no/1.1525 "1.1525") 1.1 | [Unalloyed tool steels / carbon steels](/categories/unalloyed-tool-steels-carbon-steels "Unalloyed tool steels / carbon steels") | 44 | 0,75-0,85 | 0,10-0,40 | 0,10-0,30 | 0,03 | 0,03 |
| [C105W2](/materials/din-en/c105w2 "C105W2") | [1.1535](/materials/material-no/1.1535 "1.1535") 1.1 | [Unalloyed tool steels / carbon steels](/categories/unalloyed-tool-steels-carbon-steels "Unalloyed tool steels / carbon steels") | 26 | 0,85-0,95 | 0,10-0,40 | 0,10-0,30 | 0,03 | 0,03 |
| [C80W2](/materials/din-en/c80w2 "C80W2") | [1.1625](/materials/material-no/1.1625 "1.1625") 1.1 | [Unalloyed tool steels / carbon steels](/categories/unalloyed-tool-steels-carbon-steels "Unalloyed tool steels / carbon steels") | 27 | 0,75-0,85 | 0,10-0,35 | 0,10-0,30 | 0,03 | 0,03 |
| [C85U](/materials/din-en/c85u "C85U") | [1.1830](/materials/material-no/1.1830 "1.1830") 1.1 | [Unalloyed tool steels / carbon steels](/categories/unalloyed-tool-steels-carbon-steels "Unalloyed tool steels / carbon steels") | 16 | 0,80-0,90 | 0,50-0,70 | 0,25-0,40 | 0,025 | 0,02 |
| [BW1A](/materials/bs/bw1a "BW1A") | — |  | 5 | 0.85-0.94 | 0.1-0.4 | 0.17-0.37 | ≤0.03 | ≤0.025 |

## Not sure which one your print means?

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 "Inquiry")