Don't forget, just because someone owns a testing machine does not mean:
(1) they use it.
(2) use it fequently enough to be useful
(3) know how to use it properly
(4) keep it properly maintained and calibrated.
(5) have their operators properly trained.
You'd be suprised how often one of the above 4 conditions exist a manufacturing plant. That's why the MIL-Specs, ISO9001, etc. all came about. It's very difficult to prove a quality product without destroying it in testing, that's why you prove your process is good and repeatable.
Good companies consider their Quality Control and Assurance procedures to be confidential business information. They won't be providing too many details on this forum.
Of the companies listed above, one of the "major players" has indicated in forrums that they use steel manufactuerer's specification sheets to eliminate some tests. They depend upon their supplier to have gotten it right.
(1) they use it.
(2) use it fequently enough to be useful
(3) know how to use it properly
(4) keep it properly maintained and calibrated.
(5) have their operators properly trained.
You'd be suprised how often one of the above 4 conditions exist a manufacturing plant. That's why the MIL-Specs, ISO9001, etc. all came about. It's very difficult to prove a quality product without destroying it in testing, that's why you prove your process is good and repeatable.
Good companies consider their Quality Control and Assurance procedures to be confidential business information. They won't be providing too many details on this forum.
Of the companies listed above, one of the "major players" has indicated in forrums that they use steel manufactuerer's specification sheets to eliminate some tests. They depend upon their supplier to have gotten it right.