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AISI / SAE · United States · 4 grades

# 4140

The designation 4140 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* **Steels for surface hardening · 13 grades**](/categories/steels-for-surface-hardening "Category: Steels for surface hardening · 13 grades")
- [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 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 | C% | Si% | S% | Mn% | P% | Cr% |
|---|---|---|---|---|---|---|---|---|---|
| [1.7223](/materials/material-no/1.7223 "1.7223") | [1.7223](/materials/material-no/1.7223 "1.7223") 1.7 | [Steels for surface hardening](/categories/steels-for-surface-hardening "Steels for surface hardening") | 30 | 0,38-0,44 | 0,15-0,40 | 0,035 | 0,50-0,80 | 0,025 | 0,90-1,20 |
| [1.7225](/materials/material-no/1.7225 "1.7225") | [1.7225](/materials/material-no/1.7225 "1.7225") 1.7 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 95 | 0,38-0,45 | ≤0,40 | 0,035 | 0,60-0,90 | 0,025 | 0,90-1,20 |
| [42CrMoS4](/materials/din-en/42crmos4 "42CrMoS4") | [1.7227](/materials/material-no/1.7227 "1.7227") 1.7 | [Quenched and tempered steels](/categories/quenched-and-tempered-steels "Quenched and tempered steels") | 28 | 0,38-0,45 | ≤0,40 | 0,020-0,040 | 0,60-0,90 | 0,025 | 0,90-1,20 |
| [42CrMo4](/materials/din-en/42crmo4 "42CrMo4") | — |  | 5 | 0.38-0.45 | ≤0.3 | ≤0.035 | 0.6-0.9 | ≤0.035 | 0.9-1.2 |

## 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")