1、4A370-19e1TangentialProlongationTestProlongationLongitudinal TestRadial Test(a)Shafts and RotorsProlongationangentialTestLongitudinal Test(b)Hollow ForgingsProlongationProlongationTangential TestTangential Test(c)Disk Forgings-ProlongationProlongationTangential Test(d)Ring ForgingsTangential TestFIG
2、.2 Location of Longitudinal Tension Test Specimens in Rings Cut from Tubular Productsper inch of reduced section,or the distance between the grips8.4.3 As an alternative,if the machine is equipped with afor test specimens not having reduced sections.This speeddevice to indicate the rate of loading,t
3、he speed of the machineshall be maintained through the yield point or yield strength.Infrom half the specified yield point or yield strength through thedetermining the tensile strength,the free-running rate ofyield point or yield strength may be adjusted so that the rate ofseparation of the heads sh
4、all not exceed 2 in.per min per inchstressing does not exceed 100 000 psi(690 MPa)/min.of reduced section,or the distance between the grips for testHowever,the minimum rate of stressing shall not be less thanspecimens not having reduced sections.In any event,the10 000 psi(70 MPa)/min.minimum speed o
5、f testing shall not be less than io thespecified maximum rates for determining yield point or yield9.Test Specimen Parametersstrength and tensile strength.9.1 Selection-Test coupons shall be selected in accordance8.4.2 It shall be permissible to set the speed of the testingwith the applicable produc
6、t specifications.machine by adjusting the free running crosshead speed to the9.1.1 Wrought Steels-Wrought steel products are usuallyabove specified values,inasmuch as the rate of separation oftested in the longitudinal direction,but in some cases,whereheads under load at these machine settings is less than thesize permits and the service justifies it,testing is in thespecified values of free running crosshead speed.transverse,radial,or tangential directions(see Figs.1 and 2).Copyright by ASTM Intl(all rights reserved):Wed Sep 25 23:31:48 EDT 20194
