Boron content in Carbon Steel - Weldability issues 1

[starflex]

Dear All,

I have a ongoing question regarding the boron content in carbon steel, and how it affects the weldability.

Sometimes there is a 8ppm threshold that is reported as the limit for certain pre-heat requirements, or for pre-qualified steel in certain standards, notch tensile strength behavior. Although the number, 8ppm, is a recurrent one, I cannot find any scientific evidence and study that explains the figure.

Are you aware of any publication on this regard (that specifically address the 8ppm value) ?

Thanks,

Paolo

 

[metengr]

https://www.dillinger.de/imperia/md...nfos/weitere/ki_baustaehle_mit_bor_rev0_e.pdf

https://app.aws.org/wj/supplement/WJ_1975_02_s45.pdf