Interpretation of standard as Per ASTM A6 /A6M for Material MTC tensile Testing Requirement
Mayur Hiremath
It has raised me a doubt based on the Client comments, hence requesting for the clarification form Specialist of the below points as stated in the ASTM A6/A6M.
1) According to the table B & Table C from ASTM A6/ A6M (Refer attached Snap Shot of the Page). With Reference to the attached MTC Grade A572 Gr50, Client has Comment Required 2 Tensile test according to ASTM A6/A6M. Hence Commented and Rejected the MTC. Please kindly explain about the Validity of the Comment.
Scenario 1 My Interpretation of standard as per ASTM A6/ A6M
2) According to the Table B: As per my understanding is, when the Manufacturer Mill if rolling two separate Thickness (Example: 12MM plate and 50 mm Plate) form the Same Heat Number irrelevant to batch number / Plate Number. Then we need to have 1 tensile test for each one. (Example: 12MM plate one sample tensile test will be taken and need to be reported in the MTC of that Result and Other 50MM plate one sample tensile test will be taken and need to be reported in MTC, hence here total only 2 No tensile is conducted for each one thickness).
As per my understanding is, when the Manufacturer Mill if rolling only 12mm Thickness (Example: 12MM plate) form the one Heat Number irrelevant to batch number / Plate Number. Then we need to have 1 tensile test for that one. (Example: 12MM plate one sample tensile test and need to be reported in MTC, hence here total only 1 No tensile is conducted for that one thickness).
Scenario 1 Client Interpretation of standard as per ASTM A6/ A6M
3) According to the Table B: As per Client understanding is, when the Manufacturer Mill if rolling two separate Thickness (Example: 12MM plate and 50 mm Plate) form the Same Heat Number irrelevant to batch number / Plate Number. Then we need to have 2 Separate tensile tests for each one. (Example: 12MM plate 2 tensile test and need to be reported in the MTC and Other 50MM plate 2 tensile and need to be reported in MTC, hence here 4 Nos of tensile is conducted for each 2 for one thickness).
As per client understanding is, when the Manufacturer Mill if rolling only 12mm Thickness (Example: 12MM plate) form the one Heat Number irrelevant to batch number / Plate Number. Then we need to have 2 tensile test for that one heat Number. (Example: 12MM plate 2 sample tensile test and need to be reported in MTC, hence here total only 2 No tensile is conducted for that one thickness).
Total 3 page Nos Attachments Snap shot of the pages.
1) ASTM A6 / A6M
2) MTC Copy of the Minmetals Yingkou medium plate Co, Ltd (Heat No / Batch No: 12Thk 19105410A/1955874, 12Thk 19205764A /1960419, 12Thk 19205561A/195588, 25Thk 19205529D/201905260214) Certificate No: D070015082019B073036 Date of Issue 2019-07-09, Grade A572 Gr.50
3) Snap shot of client Comment highlighted in Red Cloud Mark.
Once again thanks in Advance and waiting for your Explanations.
james gerald
Thanks & Regards
J.Gerald Jayakumar
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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Ramesh
Your MTC has 4 different heat numbers ( 3 for 12 mm and one for 25mm thk)
As per table B from ASTM A6/ A6M, 2 tensile per heat is required.
So, 4 *2 = 8 tensile tests to be reported in MTC.
If your MTC has same heat for 12 mm and 25mm, then 2 tensile is ok for both , i,e one from minimum thickness – 12mm and one from max thickness 25mm
Thanks and Regards
Rameshkannan Devaraj
"What you have learned is a mere handful; What you haven't learned is
the size of the world – Avvaiyar"
--
james gerald
Thanks & Regards
J.Gerald Jayakumar