ASTM A pdf – Download as PDF File .pdf), Text File .txt) or read online. 3 Oct ASTM AM Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates_建筑/土木_工程科技_专业资料。. ASTM-A, ASTM-A, BS-EN and others). Reports. A test report documenting inspection and analysis results can be automatically produced at the.
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With a fracture already present the strength of the material is compromised and is not reliable without further analysis dependent upon the intended use of the product.
It looks like your backwall signal is far too high it is off screen for the ASTM test. At the proper sensitivity you may not even see them.
You say these indications are only mm long. If you accept this plate and the crane truss fails and the material is traced back to your company and then to you as the inspector is your butt covered? As you described ” Plate is OK as per referece standard”. The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other. Its future usefulness has to be decided by designer or client not by UT man. x435
It was developed to assure delivery of steel plates free of gross internal discontinuities such as pipe, ruptures, or laminations and is to be used whenever the inquiry, contract, order, or specification states that the plates are to be subjected to ultrasonic examination. How deep are the cracks? Grid scanning shall be continuous along perpendicular grid ashm or shall be qstm along parallel paths, transverse to the major plate axis, or shall be continuous along parallel paths, parallel to the major plate axis, or smaller centers.
Csaba; you said “any intermediate reflectors are cause for rejection” But we can not do this because we have to work with respect to standard. You are a little off topic. I believe requires grid scanning only and is not a very tough test to pass.
Historical Version s – view previous versions of standard. Again, I think it is great that you take this much effort into something like this for your company, as well as the cutomer.
Cracks can be acceptable if an Engineers Critical Assessment is done on them. Our client learned an expensive lesson on UT examination, and testing for end use. JeffThis plate will not be machine. I again agree with Dent: Even though the plate had passed A examination, there were lots of surface defects on the gear teeth, which was not acceptable to their customer.
It is informational astmm and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Can they be ground out? However if these plates are not subject to high stress or fatigue conditions they could very well be acceptable. Referenced Documents a345 separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Brenton ; forget the weld. Where do you draw the line on acceptable cracks then?
An equivalent standard is one which covers the qualification and certification of ultrasonic nondestructive examination candidates and which is acceptable to the purchaser. Referenced Documents purchase separately The documents listed below are referenced within asttm subject standard but x435 not provided as part of the standard. I personally would count these small cracks as grossly unacceptable because there is obviously a lack of consistent workmanship in these welds.
Are there more in the material in other places that are too small to detect with the technique you are using? You say that you get a reflection from the middle of the plate thickness The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other. Material is normal carbon steel and very low alloy element Niobyum and Titanium.
A superscript epsilon e indicates an editorial change since the last revision or reapproval.
ASTM A435/A435M – 17
As I understand it there are no welds involved. Thanks for all response my question. The customer, our client, had thought that they were getting ‘clean’ plate.
What is thickness of plate? Unfortunately, they don’t seem to have mentioned to you or anyone else about having any “cracks” or “crack-like” indications allowed. The plate will be used for crane truss. These indications are in the middle of the plate. Nondestructive examination of the material shall be conducted in an area free of operations that interfere with proper functioning of the equipment.
You said the plate is not going to be machined either – I suppose this plate that goes to the crane would not be a load-bearing plate and might attach with rivots or something? Link to Active This link will always route to the current Active version of the standard.
You would have to take an accurate macro section to see the extent of the cracking and then determine why the cracks are there.