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title: "630 — 3 equivalent grades, compared"
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AISI / SAE · United States · 3 grades

# 630

The designation 630 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* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades")
- [*Category* **Stainless steels · 468 grades**](/categories/stainless-steels "Category: Stainless steels · 468 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% | Si% | Cr% | Mn% | Ni% | Cu% |
|---|---|---|---|---|---|---|---|---|---|
| [X4CrNiCuNb16-4](/materials/din-en/x4crnicunb16-4 "X4CrNiCuNb16-4") | [1.4540](/materials/material-no/1.4540 "1.4540") 1.4 | [Others](/categories/others "Others") | 26 | ≤0,06 | ≤1,00 | 15,0-17,0 | ≤1,00 | 3,50-5,00 | 2,50-4,00 |
| [1.4542](/materials/material-no/1.4542 "1.4542") | [1.4542](/materials/material-no/1.4542 "1.4542") 1.4 | [Stainless steels](/categories/stainless-steels "Stainless steels") | 48 | ≤0,07 | ≤0,70 | 15,0-17,0 | ≤1,50 | 3,00-5,00 | 3,00-5,00 |
| [X5CrNiCuNb17-4-4](/materials/din-en/x5crnicunb17-4-4 "X5CrNiCuNb17-4-4") | [1.4548](/materials/material-no/1.4548 "1.4548") 1.4 | [Special steels for aviation and aerospace](/categories/special-steels-for-aviation-and-aerospace "Special steels for aviation and aerospace") | 21 | ≤0,07 | ≤1,00 | 15,0-17,5 | ≤1,00 | 3,00-5,00 | 3,00-5,00 |

## 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")