Dissimilar weld metal cracking occurs because the coefficients of thermal expansion between ferritic steels and 300 Series stainless steels differ by ________ or more.
Dissimilar weld metal cracking occurs because the coefficients of thermal expansion between ferritic steels and 300 Series stainless steels differ by ________ or more.
Dissimilar weld metal cracking occurs because the coefficients of thermal expansion between ferritic steels and 300 Series stainless steels differ by 30% or more. The significant difference in thermal expansion rates causes stress during heating and cooling cycles, leading to cracking.
Cracking can occur because the coefficients of thermal expansion of ferritic materials (e.g. steels) and austenitic materials (e.g. 300 series SS and nickel-based alloys) differ by about 25 % to 30 %. (