--- title: "G10550 — 10 equivalent grades, compared" description: "The designation G10550 is carried by 10 different grades. Compare them on the elements that actually differ, then open the one your print means." canonical: https://steelequivalents.com/materials/uns/g10550 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/g10550.md cs: https://steelequivalents.com/cs/materiály/uns/g10550.md de: https://steelequivalents.com/de/werkstoffe/uns/g10550.md es: https://steelequivalents.com/es/materiales/uns/g10550.md fr: https://steelequivalents.com/fr/matériaux/uns/g10550.md hu: https://steelequivalents.com/hu/anyagok/uns/g10550.md it: https://steelequivalents.com/it/materiali/uns/g10550.md nl: https://steelequivalents.com/nl/materialen/uns/g10550.md pl: https://steelequivalents.com/pl/materiały/uns/g10550.md pt: https://steelequivalents.com/pt/materiais/uns/g10550.md ru: https://steelequivalents.com/ru/материалы/uns/g10550.md tr: https://steelequivalents.com/tr/malzemeler/uns/g10550.md zh: https://steelequivalents.com/zh/材料/uns/g10550.md ja: https://steelequivalents.com/ja/材料/uns/g10550.md ar: https://steelequivalents.com/ar/المواد/uns/g10550.md ko: https://steelequivalents.com/ko/재료/uns/g10550.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/g10550.md hi: https://steelequivalents.com/hi/सामग्री/uns/g10550.md content_hash: sha256:825e0d2cee33c5bb43607a0d30665c86e948adf348459b5778ec53b066f179b3 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/uns/g10550 > Canonical URL: https://steelequivalents.com/materials/uns/g10550 > 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. UNS · United States · 10 grades # G10550 The designation G10550 is carried by 10 different grades. Compare them on the elements that actually differ, then open the one your print means. - *Matching grades* **10** - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades") - [*Category* **Steels for surface hardening · 13 grades**](/categories/steels-for-surface-hardening "Category: Steels for surface hardening · 13 grades") [Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry") ## Which of the 10 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% | P% | S% | Si% | Mn% | Cr% | |---|---|---|---|---|---|---|---|---|---| | [1.0535](/materials/material-no/1.0535 "1.0535") | [1.0535](/materials/material-no/1.0535 "1.0535") 1.0 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 101 | 0,52-0,60 | 0,045 | 0,045 | ≤0,40 | 0,60-0,90 | ≤0,40 | | [1.0601](/materials/material-no/1.0601 "1.0601") | [1.0601](/materials/material-no/1.0601 "1.0601") 1.0 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 92 | 0,57-0,65 | 0,045 | 0,045 | ≤0,40 | 0,60-0,90 | ≤0,40 | | [1.1203](/materials/material-no/1.1203 "1.1203") | [1.1203](/materials/material-no/1.1203 "1.1203") 1.1 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 32 | 0,52-0,60 | 0,035 | 0,035 | ≤0,40 | 0,60-0,90 | ≤0,40 | | [1.1203](/materials/material-no/1.1203 "1.1203") | [1.1204](/materials/material-no/1.1204 "1.1204") 1.1 | [Others](/categories/others "Others") | 10 | 0,52-0,60 | 0,025 | 0,025 | 0,15-0,35 | 0,60-0,90 | ≤0,40 | | [C50E](/materials/din-en/c50e "C50E") | [1.1206](/materials/material-no/1.1206 "1.1206") 1.1 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 33 | 0,47-0,55 | 0,03 | 0,035 | ≤0,40 | 0,60-0,90 | ≤0,40 | | [C55R](/materials/din-en/c55r "C55R") | [1.1209](/materials/material-no/1.1209 "1.1209") 1.1 | [Others](/categories/others "Others") | 15 | 0,52-0,60 | 0,03 | 0,020-0,040 | ≤0,40 | 0,60-0,90 | ≤0,40 | | [1.1213](/materials/material-no/1.1213 "1.1213") | [1.1213](/materials/material-no/1.1213 "1.1213") 1.1 | [Steels for surface hardening](/categories/steels-for-surface-hardening "Steels for surface hardening") | 20 | 0,50-0,57 | 0,025 | 0,035 | 0,15-0,35 | 0,40-0,70 | — | | [C56D2](/materials/din-en/c56d2 "C56D2") | [1.1220](/materials/material-no/1.1220 "1.1220") 1.1 | [Others](/categories/others "Others") | 3 | 0,54-0,58 | 0,02 | 0,025 | 0,10-0,30 | 0,50-0,70 | ≤0,10 | | [1.1221](/materials/material-no/1.1221 "1.1221") | [1.1221](/materials/material-no/1.1221 "1.1221") 1.1 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 38 | 0,57-0,65 | 0,03 | 0,035 | ≤0,40 | 0,60-0,90 | ≤0,40 | | [SAE 1055](/materials/din-en/sae-1055 "SAE 1055") | [1.9518](/materials/material-no/1.9518 "1.9518") 1.9 | [Others](/categories/others "Others") | 3 | 0,50-0,60 | 0,03 | 0,05 | — | 0,60-0,90 | — | ## 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")