What’s up guys? Michael with Michael Talks Metal. Here for video 121. Today we’re wading back into the MTR pool. The ole material (mill) test report pool. Get your floaties ready b/c we’re jumpin back in! We’re back talkin test reports, let’s do it!
First off, what is an MTR? An MTR is a Material Test Report and this is another part of a series to reveal the mysteries of a metal producers certification for material. This time the material is an austenitic stainless steel. It also happens to be produced by an Italian mill so we will get a bit of a language lesson as well.
First thing to mention is the alternate names that appear on this document are in four languages….. Italian, German, English and French and not always in that order. Find the full Material Test Report (MTR) here.
For our example today, we are using a document from Valbruna produced to meet the requirements of 321 and 321H stainless steel. For more information on this alloy …click here ( video 74)
In the top section of the certification, we have details of a specific customer and mill order that are self explanatory and we can skip these to the more technical parts. This header section is repeated on each page of this 3 page document.
Next we have an extensive section showing a long list of specifications that includes such specifics as the revision date/level, alloy/UNS alloy designation and condition.
Following that, is our shape, size, length, heat number, piece count, weight, and a lot number. The lot represents the portion of the heat processed to this size and condition at one time.
On the bottom, we have a footer with the Quality Management Systems the mill is registered to and the responsible mill authorizations. This is repeated on each page of the certification along with the date and page number.
Below that we have a test to determine the grain size.
Chemical composition is shown in the next section. The requirements are shown in fine print above the actual values for each element. The elements listed are either required or restricted by the specifications the material is certified to. Other elements may be listed in this section. Note that Cobalt ( Co) is listed but is neither required or restricted. Heat chemistry samples are taken from the melt during production and the numbers are in weight percent.
It looks like we are just about out of time for today, so we will pick up this discussion next time. However, before I let you go, I will remind you to……CHECK THE SPECS!!!!!!!!!!!!!!!!!!!!!! (Twice) This is Michael with Michael Talks Metal. Thanks for watching. Michlin Metals is a full service value added supplier and distributor of all things metal. Check the website for more info www.michlinmetals.com. Missed last weeks’ video? Click here. Still here and haven’t subscribed, click here. Thanks again for watching, this is Michael with Michael Talks Metal. See you next week, same time, same place. I’m out!