I would appreciate if anyone could clarify something in QW420.2 for me. The statement I'm questioning (1st sentence, 2nd paragraph) is:
"...welding procedure qualification with a base metal in one P-Number (or P-Number plus Group Number) or one S-Number (or S-Number plus Group Number)...
I'm analyzing a reamer bit that failed in in a spiral path, with a flat fracture face, in a brittle manner. I cannot identify the manufacturer of the bit (the only markings are HSS Poland) and consequently have no mill certs for the chemistry to check the material against. I sparked the reamer...
I have a component that is spec'ed as 304 SS. However, it was brought to my attention that it is magnetic so I had PMI done to confirm that it is 304. The chemistry checks out. How is is possible for an austenitic to be magnetic??
I have been asked if stainless steel bolts can be used to fasten together a two part C937 Bronze (80%Cu, 10%Pb, 10%Sn) sealing ring without risking galvanic corrosion (water (80 deg C) on one side, hydrocarbon vapour on the other side). I've tried to consult the galvanic serious but find myself...
I have a 1.5" thick piece of equipment made of 329 Duplex (old duplex grade, approximately 70% ferrite). We experience metal loss in isolated areas (cutting due to slurry) and weld repair these areas. The manufacturer does not recommend weld repairing the material more than 3 times, as...
I have damaged inner and outer races from a roller bearing that show discoloration (bluish and red/orange)markings parallel with the roller axis. I believe the discoloration may be due to corrosion but I'm really not sure. Is there anyone out there that I could send a photo of the bearing to...
I have a large bearing from a pump that has surface damage on both the inner and outer race but not to the rollers. Macroscopic discoloration of the undamaged areas and smooth "globular" regions in the damaged areas made me first think that the damage may have been caused by a stray...
I'm looking for a stainless steel strip material with a hardness greater than 550HV. It is for a blade like component that cleans sand out between the disks of a disk stack. The current blades are 0.012" thick and are made of a spring steel of about 540 HV but they are not standing up to...
