---
title: "A42AP — 4 equivalent grades, compared"
description: "The designation A42AP is carried by 4 different grades. Compare them on the elements that actually differ, then open the one your print means."
canonical: https://steelequivalents.com/materials/afnor/a42ap
language: en
robots: index, follow
og_type: website
type: material-detail
language_alternates:
  en: https://steelequivalents.com/materials/afnor/a42ap.md
  cs: https://steelequivalents.com/cs/materiály/afnor/a42ap.md
  de: https://steelequivalents.com/de/werkstoffe/afnor/a42ap.md
  es: https://steelequivalents.com/es/materiales/afnor/a42ap.md
  fr: https://steelequivalents.com/fr/matériaux/afnor/a42ap.md
  hu: https://steelequivalents.com/hu/anyagok/afnor/a42ap.md
  it: https://steelequivalents.com/it/materiali/afnor/a42ap.md
  nl: https://steelequivalents.com/nl/materialen/afnor/a42ap.md
  pl: https://steelequivalents.com/pl/materiały/afnor/a42ap.md
  pt: https://steelequivalents.com/pt/materiais/afnor/a42ap.md
  ru: https://steelequivalents.com/ru/материалы/afnor/a42ap.md
  tr: https://steelequivalents.com/tr/malzemeler/afnor/a42ap.md
  zh: https://steelequivalents.com/zh/材料/afnor/a42ap.md
  ja: https://steelequivalents.com/ja/材料/afnor/a42ap.md
  ar: https://steelequivalents.com/ar/المواد/afnor/a42ap.md
  ko: https://steelequivalents.com/ko/재료/afnor/a42ap.md
  pt-br: https://steelequivalents.com/pt-br/materiais/afnor/a42ap.md
  hi: https://steelequivalents.com/hi/सामग्री/afnor/a42ap.md
content_hash: sha256:68d5e2bc21731b61dad3f28639de06282867ad6f16d324776aa4fffd3347bd98
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/afnor/a42ap
> Canonical URL: https://steelequivalents.com/materials/afnor/a42ap
> 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.

AFNOR · France · 4 grades

# A42AP

The designation A42AP is carried by 4 different grades. Compare them on the elements that actually differ, then open the one your print means.

- *Matching grades* **4**
- [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades")
- [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades")
- [*Category* **Aging resistant steels · 2 grades**](/categories/aging-resistant-steels "Category: Aging resistant steels · 2 grades")

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

## Which of the 4 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 | S% | Mn% | C% | Si% | P% | Cr% |
|---|---|---|---|---|---|---|---|---|---|
| [P265S](/materials/din-en/p265s "P265S") | [1.0130](/materials/material-no/1.0130 "1.0130") 1.0 | [Unalloyed structural steels](/categories/unalloyed-structural-steels "Unalloyed structural steels") | 6 | 0,025 | 0,50-1,50 | ≤0,20 | ≤0,40 | 0,025 | — |
| [1.0425](/materials/material-no/1.0425 "1.0425") | [1.0425](/materials/material-no/1.0425 "1.0425") 1.0 | [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels") | 79 | 0,01 | 0,80-1,40 | ≤0,20 | ≤0,40 | 0,025 | ≤0,30 |
| [P280GH](/materials/din-en/p280gh "P280GH") | [1.0426](/materials/material-no/1.0426 "1.0426") 1.0 | [Aging resistant steels](/categories/aging-resistant-steels "Aging resistant steels") | 56 | 0,015 | 0,90-1,50 | 0,08-0,20 | ≤0,40 | 0,025 | ≤0,30 |
| [P245GH](/materials/din-en/p245gh "P245GH") | — |  | 4 | ≤0.03 | 0.7-1 | 0.17-0.23 | 0.17-0.37 | ≤0.035 | ≤0.2 |

## 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")