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title: "Gr.55 — 2 equivalent grades, compared"
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AISI / SAE · United States · 2 grades

# Gr.55

The designation Gr.55 is carried by 2 different grades. Compare them on the elements that actually differ, then open the one your print means.

- *Matching grades* **2**
- [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades")
- [*Category* **Microalloyed steels · 5 grades**](/categories/microalloyed-steels "Category: Microalloyed steels · 5 grades")

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

## Which of the 2 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% | Al% | Si% | S% | Ti% | Mn% |
|---|---|---|---|---|---|---|---|---|---|
| [1.0345](/materials/material-no/1.0345 "1.0345") | [1.0345](/materials/material-no/1.0345 "1.0345") 1.0 | [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels") | 62 | ≤0,16 | ≥0,020 | ≤0,35 | 0,01 | ≤0,03 | 0,60-1,20 |
| [H 360LA](/materials/din-en/h-360la "H 360LA") | [1.0550](/materials/material-no/1.0550 "1.0550") 1.0 | [Microalloyed steels](/categories/microalloyed-steels "Microalloyed steels") | 6 | ≤0,10 | ≥0,015 | ≤0,50 | 0,025 | ≤0,15 | ≤1,60 |

## 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")