Are Brinell hardness values concrete proof that a weld joint is mechinally safe after PWHT. For example P1 to P5A material using E9018-B3 with a hardness of 138 parent material,165 HAZ, 207 weld material, 135 HAZ, and 131 parent material. Are these hardness values for this type of joint acceptable?
Just wondering what acceptable Brinell hardness values are for P5A to P1 material as related to B31.1. Welded with 9018. Would a value of 207 be acceptable for the weld?