# 1.1203 (C55E): equivalents

Quelle: <https://mvg-frankfurt.de/en/materials/comparison/1-1203>

> 1.1203 (C55E) internationally: AISI 1055, S55C, 1055, Ck55, 070M55 and 6 further designations by country and standard.

AISI 1055 · S55C · 1055 · Ck55 · 070M55

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## Designations by country and standard

| Country / type | Standard | Designation |
|---|---|---|
| Europe | EN | 1.1203· C55E |
| Germany | DIN (old) | Ck55 |
| France | AFNOR | XC54 · XC55H1 |
| United Kingdom | BS | 070M55 |
| ISO | ISO | C55E4 |
| Italy | UNI | C55 |
| Japan | JIS | S55C |
| Spain | UNE | C55k · F1150 |
| USA | AISI | AISI 1055 |
| USA | SAE | 1055 |

## Not unambiguous

- **070M55** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535).
- **1055** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535).
- **AISI 1055** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535).
- **C55** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535), [1.1209](https://mvg-frankfurt.de/en/materials/comparison/1-1209).
- **C55E4** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535).
- **C55k** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535), [1.1221](https://mvg-frankfurt.de/en/materials/comparison/1-1221).
- **Ck55** also matches [1.1204](https://mvg-frankfurt.de/en/materials/comparison/1-1204).
- **S55C** also matches [1.0535](https://mvg-frankfurt.de/en/materials/comparison/1-0535).

Equivalents are approximations: the composition and limits of the standards differ in part. For certificates, the ordered standard applies.