ASTM B394-03 pdf free

04-17-2021 comment

ASTM B394-03 pdf free.Standard Specification for Niobium and Niobium Alloy Seamless and Welded Tubes.
For the purposes of determining compliance with thespecified limits for requirements of the properties listed in thisspecification, an observed value or a calculated value shall berounded as indicated in accordance with the rounding methodof Practice E 29.
Conduct tension tests in accordancewith Test Methods E8. Determine the yield strength by the0.2 % offset method.Small size, 1-in.(25.4-mm) gage lengthspecimens proportional to the standard specimen can be used.Determine tensile properties using a strain rate of 0.003 to0.007 in./in. min (mm/mm-min) through the yield point. Afterthe yield strength has been exceeded, increase the cross-headspeed to approximately 0.05in./in.min (mm/mm-min) tofailure.These tests are op-tional. Should the purchaser require either or both of these testson finished tubular product,the requirement must be agreedupon at the time of purchase.The cost of this special provisionwill be negotiated between the purchaser and the manufacturerat the time of purchase. The procedure for the hydrostatic testis outlined in 14.2.1,and the procedure for the pneumatic testis outlined in 14.2.2.If both tests are specified by thepurchaser,the hydrostatic test will be done first.
Each tube so tested shall withstandan internal air pressure of 100 psi(.7 MPa) minimum for aminimum of 5 s without showing evidence of leakage. The testmethod used,for example, placing the tube under water orusing the pressure differential method, shall permit easy visualdetection of any leakage. Any evidence of leakage shall because for rejection of that tube.A section of the finished tube shall be capableof being flared without cracking that is visible to the unaidedeye. The flare shall be made with a tool having a 60° includedangle until the outside diameter has been increased 15 %.15.Inspection
If so specified on the purchase order, the purchaser orhis representative may witness the testing and inspection of thematerial at the place of manufacture. In such cases,thepurchaser shall state in his purchase order which tests hedesires to witness.The manufacturer shall give ample notice tothe purchaser as to the time and place of the designated test.Ifthe purchaser’s representative does not present himself at theagreed-upon time for the testing, and if no new date is set, themanufacturer shall consider the requirement for purchaser’sinspection at the place of manufacture to be waived. When theinspector representing the purchaser does appear at the ap-pointed place and time, the manufacturer shall afford him allreasonable facilities to see that the material is being furnishedin accordance with this specification. This inspection shall beconducted so as not to interfere unnecessarily with productionoperations.ASTM B394 pdf download.

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