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![Bake hardening steels](/images/uploads/5249503a-d44b-4577-9f43-dd828297da2e/bake-hardening-steels-category-pressed-body-panels-1920x1080.jpg)

Category · 4 grades

# Bake hardening steels

Bake hardening steels are sheet steels designed to develop additional strength during the paint-baking cycle after forming. They combine good formability during pressing with improved resistance to dents in finished automotive body panels and other formed sheet components.

| Grade | Material no. | C | Al | Si | P | S | Mn |
|---|---|---|---|---|---|---|---|
| [H 180 B](/materials/din-en/h-180-b "H 180 B") | [1.0395](/materials/material-no/1.0395 "1.0395") | ≤0,05 | ≥0,015 | ≤0,50 | 0,06 | 0,025 | ≤0,70 |
| [H 220 B](/materials/din-en/h-220-b "H 220 B") | [1.0396](/materials/material-no/1.0396 "1.0396") | ≤0,06 | ≥0,015 | ≤0,50 | 0,08 | 0,025 | ≤0,70 |
| [H 260 B](/materials/din-en/h-260-b "H 260 B") | [1.0400](/materials/material-no/1.0400 "1.0400") | ≤0,08 | ≥0,015 | ≤0,50 | 0,1 | 0,025 | ≤0,70 |
| [H 300 B](/materials/din-en/h-300-b "H 300 B") | [1.0444](/materials/material-no/1.0444 "1.0444") | ≤0,10 | ≥0,015 | ≤0,50 | 0,12 | 0,025 | ≤0,70 |

## Standards covering this category

 1

- [**DIN / EN***4 grades*](/materials/din-en "DIN / EN — 4 grades in this category")

## Property ranges

 1

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| rho | g/cm³ | 7.85 | 7.85 | 4 |

Derived from 4 grades in this category with a recorded value.

## Composition range

 6

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| C | % | 0.05 | 0.1 | 4 |
| Al | % | 0.015 | 0.015 | 4 |
| Si | % | 0.5 | 0.5 | 4 |
| P | % | 0.06 | 0.12 | 4 |
| S | % | 0.025 | 0.025 | 4 |
| Mn | % | 0.7 | 0.7 | 4 |

Derived from 4 grades in this category with a recorded value.

## Related guides

 2

- [**Case Hardening Methods for Steel**](/wiki/heat-treatment/case-hardening-methods-for-steel "Case Hardening Methods for Steel")
- [**Steel Tempering Response and Secondary Hardening**](/wiki/heat-treatment/steel-tempering-response-and-secondary-hardening "Steel Tempering Response and Secondary Hardening")