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I'm looking for a reference for standards-based acceptance/rejection criteria of microstructure of low alloy structural steel plate. Background - during welding of structure, +45mm plate cracked at midline under thermal stress. Root mechanism determined to be mid-line lamination & non-metallic...

Possible Suggestion: Once you chemically treat the new piece to match the existing as close as feasibly possible, install it, and lightly treat the entire section (both old and new) to help them blend. Should get you close enough that the casual observer will not notice. This of course is...

If the part is for a ground vehicle or ground troop application, the requirement will likely be a chemical agent resistant coating (CARC paint). A lot of hazmat/PPE issues with that stuff.

I found a wonderful resource for bolt information that I use a bit. In addition to bolt design topics, it also discusses techniques for tightening, pre-loading, double nutting, etc. Decent video and animations as well. It generally refers to UK standards vs ASTM and SAE, but the same physics...

i've done several 25-30 mile fun marches at various posts, a few thousand of people at a time. the biggest challenges are medical support and adequate toilet facilities along the route. 1000 people can leave a big mess. 24 miles a day, 3 months straight with no rest time is pretty ambitious...

I've uploaded a photo at the following link: http://www.photo.net/photodb/member-photos?user_id=2222172 Note the abrasive wear on the threads in addition to the pitting. The initial concern was galling, but most examples I've seen before have a much more jagged fracture surface. Let me...

I've uploaded a photo at the following link: http://www.photo.net/photodb/member-photos?user_id=2222172 Note the abrasive wear on the threads in addition to the pitting. The initial concern was galling, but most examples I've seen before have a much more jagged fracture surface. Let me...

I'm not sure if I can mention companies by name on here, so I won't. Most of the time we go with one of the larger inspection companies, but occasionally we have to go with a mom-n-pop, as in this case. I'm sure I know where you're going with that, and I agree, vendors in this business like...

I work for a land-based drilling company. Recently, we've had a lot of drill pipe rejected as unservicable during routine inspections due to pitting on the threads. Our drilling mud chemistry is usually oil based, with a ph of about 9-10. We haven't observed any H2S (not that we know of...

I work for a land-based drilling company. Recently, we've had a lot of drill pipe rejected as unservicable during routine inspections due to pitting on the threads. Our drilling mud chemistry is usually oil (diesel) based, with barrite and caustic added, to a ph of about 9-10. We haven't...