I have been infromed that our company will receive these plates since there is no requirement to check broken sections of tested tension specimens in ASME Codes and the fact that these plates meet the requirements of NDE & mechanical tests. I have expressed my concerns of limination and have...
These plates are quenched and tempered. Our engineers in the US are discussing it now. The supplier would not do anything since both our purchase order and ASME Codes specify nothing on this problem. Some engineer of our company think it is not a serious problem since: 1. The lamination was...
Following is my email to high level, I omitted the supplier's name.
I visited the supplier yesterday. I discussed with professor Z, who take charge of the development of SA-738 Gr. B plates. He explained to me that the lamination was caused by the interface between different microstructures...
The problems are:
1. The acceptance standards in SA435 is "any discontinuity indication causing a total loss of back reflection which cannot be contained within a circle, the diameter of which is 3 in. or one half of the plate thickness, which is greater, is unacceptable." This means any...
The designation of these is SA-738 Gr. B, 100% UTed (0% overlaped) according to SA435. The supplier explained the lamination is caused interface betweeen different microstructures, rather than nonmetallic inclusion. Since the toughness and hardness of the two microstructures are different...
I found limination in broken sections of tested tension specimens when I visited our plates suppliers. The thickness of these plates are 12.7mm and 19.1mm respectively and the specimen type is 1.5 inch specimen according to ASTM A370. According to my knowledge, it is not acceptable since...
