	US 12,227,822 B2
	Hot-dip coated steel substrate
Michel Bordignon, Sprimont (BE); and Jonas Staudte, Montigny-les-Metz (FR)
Assigned to ArcelorMittal, Luxembourg (LU)
Filed by ArcelorMittal, Luxembourg (LU)
Filed on May 2, 2023, as Appl. No. 18/142,197.
Application 18/142,197 is a continuation of application No. 16/769,912, granted, now 11,674,209, previously published as PCT/IB2018/058185, filed on Oct. 22, 2018.
Claims priority of application No. PCT/IB2018/058185 (WO), filed on Oct. 22, 2018.
Prior Publication US 2023/0272516 A1, Aug. 31, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C22C 38/02 (2006.01); C21D 1/26 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C25D 3/30 (2006.01)

CPC C22C 38/02 (2013.01) [C21D 1/26 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C23C 2/02 (2013.01); C23C 2/0224 (2022.08); C23C 2/026 (2022.08); C23C 2/06 (2013.01); C25D 3/30 (2013.01)]

13 Claims

1. A hot-dip coated metallic steel substrate comprising:

a steel substrate surface coated with a layer of Sn directly topped by a zinc or aluminum based coating, the steel substrate having the following chemical composition in weight percent:

0.10≤C≤0.4%,

1.2≤Mn≤6.0%,

0.3≤Si≤2.5%,

Al≤2.0%,

and on a purely optional basis, at least one of the following elements:

P<0.1%,

nb≤0.5%,

B≤0.005%,

Cr≤1.0%,

Mo≤0.50%,

Ni≤1.0%,

Ti≤0.5%,

a remainder of the composition making up of iron and inevitable impurities resulting from processing, the steel substrate further comprising between 0.0001 and 0.005% by weight of Sn in a region extending from the steel substrate surface up to 10 μm.