---
title: "SNCM815 — 3 equivalent grades, compared"
description: "The designation SNCM815 is carried by 3 different grades. Compare them on the elements that actually differ, then open the one your print means."
canonical: https://steelequivalents.com/materials/jis/sncm815
language: en
robots: index, follow
og_type: website
type: material-detail
language_alternates:
  en: https://steelequivalents.com/materials/jis/sncm815.md
  cs: https://steelequivalents.com/cs/materiály/jis/sncm815.md
  de: https://steelequivalents.com/de/werkstoffe/jis/sncm815.md
  es: https://steelequivalents.com/es/materiales/jis/sncm815.md
  fr: https://steelequivalents.com/fr/matériaux/jis/sncm815.md
  hu: https://steelequivalents.com/hu/anyagok/jis/sncm815.md
  it: https://steelequivalents.com/it/materiali/jis/sncm815.md
  nl: https://steelequivalents.com/nl/materialen/jis/sncm815.md
  pl: https://steelequivalents.com/pl/materiały/jis/sncm815.md
  pt: https://steelequivalents.com/pt/materiais/jis/sncm815.md
  ru: https://steelequivalents.com/ru/материалы/jis/sncm815.md
  tr: https://steelequivalents.com/tr/malzemeler/jis/sncm815.md
  zh: https://steelequivalents.com/zh/材料/jis/sncm815.md
  ja: https://steelequivalents.com/ja/材料/jis/sncm815.md
  ar: https://steelequivalents.com/ar/المواد/jis/sncm815.md
  ko: https://steelequivalents.com/ko/재료/jis/sncm815.md
  pt-br: https://steelequivalents.com/pt-br/materiais/jis/sncm815.md
  hi: https://steelequivalents.com/hi/सामग्री/jis/sncm815.md
content_hash: sha256:fba174bd243950779a63b51bc80039888545186b3905b6cf045220ff66afd24d
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/sncm815
> Canonical URL: https://steelequivalents.com/materials/jis/sncm815
> 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 · 3 grades

# SNCM815

The designation SNCM815 is carried by 3 different grades. Compare them on the elements that actually differ, then open the one your print means.

- *Matching grades* **3**
- [*Category* **Case hardening steels · 60 grades**](/categories/case-hardening-steels "Category: Case hardening steels · 60 grades")
- [*Category* **Special steels for aviation and aerospace · 39 grades**](/categories/special-steels-for-aviation-and-aerospace "Category: Special steels for aviation and aerospace · 39 grades")

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

## Which of the 3 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% | Cr% | Mn% | Ni% | Mo% | Si% |
|---|---|---|---|---|---|---|---|---|---|
| [1.6587](/materials/material-no/1.6587 "1.6587") | [1.6587](/materials/material-no/1.6587 "1.6587") 1.6 | [Case hardening steels](/categories/case-hardening-steels "Case hardening steels") | 41 | 0,15-0,21 | 1,50-1,80 | 0,50-0,90 | 1,40-1,70 | 0,25-0,35 | ≤0,40 |
| [1.6657](/materials/material-no/1.6657 "1.6657") | [1.6657](/materials/material-no/1.6657 "1.6657") 1.6 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 40 | 0,11-0,17 | 0,80-1,10 | 0,30-0,60 | 3,00-3,50 | 0,20-0,30 | ≤0,40 |
| sncm815 | — |  | 1 | 0.12 - 0.18 | 0.7 - 1 | 0.3 - 0.6 | 4 - 4.5 | 0.15 - 0.3 | 0.15 - 0.35 |

## 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")