Patent ID: 11945503
Assignee: ARCELORMITTAL
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 26:
27. The welded, hot press-formed and cooled steel part according to claim 20, wherein the steel of the steel substrate of at least one among the first and the second coated steel part portions comprises, by weight:
0.24%≤C≤0.38%
0.40%≤Mn≤3%
0.10%≤Si≤0.70%
0.015%≤Al≤0.070%
0%≤Cr≤2%
0.25%≤Ni≤2%
0.015%≤Ti≤0.10%
0%≤Nb≤0.060%
0.0005%≤B≤0.0040%
0.003%≤N≤0.010%
0.0001%≤S≤0.005%
0.0001%≤P≤0.025%
wherein the titanium and nitrogen contents satisfy the following relationship:

Ti/N>3.42.

and the carbon, manganese, chromium and silicon contents satisfy the following relationship:, 2.6
        ⁢
        C
      
      +
      
        Mn
        5.3
      
      +
      
        Cr
        13
      
      +
      
        Si
        15
      
    
    ≥
    
      1.1
      ⁢
      %
    
  
  ,

the steel optionally comprising one or more of the following elements:
0.05%≤Mo≤0.65%
0.001%≤W≤0.30%%
0.0005%≤Ca≤0.005%
a rest being iron and impurities inevitably resulting from manufacturing.