Thank you.
Please be inform this is not pin hole. They are laminate. If pin hole, they might not a big problem because they are not homogeneous defect or continual defect and tiny. If they are pin hole, we still can sell because they might not occur whole or it is heterogeneous defect, not continual defect and very tiny to find after machining. In this case, if it is laminate, then there is possibility that this defect will be in the balanced piece.
If the reply from supplier like this, why they do not inform us before we did any transaction with them. In fact we did not require UT guarantee since we sold as mechanical parts in mold. If we did not face defects by naked eyes during machining, we will sell to customers even UT test result did not pass. For such kind of mold customers can accept all this steel without UT test, if there is no explicit defects on the surface.
This is for information to all.