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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It looks like your backwall signal is far too high it is off screen for the ASTM test. Our client learned an expensive lesson on UT examination, and testing for end use. 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.
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. Active view current version of standard. When you find many cracks which are barely technically acceptable according to the 75mm diameter area then how do you know what the height is.
If you are manufacturing the plates and you are getting these small cracks all the time then you need to change your welding process. Astk 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.
What is thickness of plate?
The question to astk would be, can the purchaser work around this area or could it be sectioned out if it is not too far from an edge? You say that you get a reflection from the middle of the plate thickness Do you have total loss of back reflection?
It’s hard to just guess, but I read ASTM-A to be a Specification used to evaluate steel plates such that they can be delivered to a machining phase with good confidence that there are no GROSS internal defects not the same as discontinuity free and that if any indications are noted, they are not larger in AREA than a 3. An equivalent standard is one which covers the qualification and certification of ultrasonic nondestructive examination candidates and which is acceptable to the purchaser.
At the proper sensitivity you may not even see them.
We had a client who bought a 6″ mm plate in order to make some gears. Brenton ; forget the weld.
Within the text, the SI units are ast in brackets. 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?
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Evaluate indications as mentioned in sec 6 of ASTM Yasin Fullfil all the requirements of Reference standard. What size and frequency probe are you using?
I want to reject this material but it must be based on standard. The values stated in each system are not exact equivalents, therefore, each system must be used independently of the other. I would print a copy of that to include in the final report packge that would be delivered to the customer. The test shall be done by one of the following methods: A number in parentheses indicates the year of last reapproval.
However if these plates are not subject to high stress or fatigue conditions they could very well be acceptable.
There is a photo of these cracks in atttachment and these crack length is about mm long but there is lots of where in plate.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. While scanning you find that a discontinuity is noticed A superscript epsilon e indicates an editorial change since the last revision or reapproval. As I understand it there are no welds involved. An equivalent standard is one which covers the qualification and certification of ultrasonic nondestructive examination candidates and which is acceptable to the purchaser.
How deep are the cracks? Realistically do you want material that has detectable cracks in it used for the load bearing parts of a crane truss?