Wedg1e
They call me Mr. Bodge-angles
- Messages
- 7,756
- Location
- Teesside, England
But was it 7000 or 6000 series, that makes all the difference to the user.
How would you tell, and if you had the means to prove one way or the other, what would you do about it other than moan to the supplier who at best would refund your money quickly?
We make calibration blocks from various metals, anything from carbon steel to Titanium and always ask for a certificate of materials analysis from our suppliers... and then to be on the safe side I point an XRF analyser at the stock before it goes for machining.
We once tried to source blocks from China; got a batch in that were engraved as 316L and had certificates to 'prove' it; it took about 5 seconds with a magnet to prove they were anything but... the XRF proved them to be 304. We refused to pay for them and the Chinese told us not to bother sending them back as the carriage would have been more than the batch was worth to them. Ironically they were dimensionally spot-on; I use them as packing pieces on the mill
