Patent ID: 8066829

Claim:
A process for making a hot stamped coated steel product, comprising: Heating a aluminum or aluminum alloy pre-coated steel blank, a thickness t p of the pre-coating being form 20 to 33 micrometers, in a furnace preheated to a temperature and time during a time defined by diagram ABCD of FIG. 1 if a thickness of said blank is greater than or equal to 0.7 mm and less than or equal to 1.5 mm, and by diagram EFGH of FIG. 1 if a thickness of said blank is greater than 1.5 mm and less than or equal to 3 mm, at a mean heating rate V c between 20 and 700° C. of 4-12° C./s, and a mean heating rate V c ′ between 500 and 700° C. of 1.5-6° C./s, to obtain a heated blank, wherein the mean heating rate V c is greater than the mean heating rate V c ′; and Hot stamping said heated blank in a die.