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See Chinese contents: GB/T 21839-2019 GB/T 21839-2019: Test methods of steel for prestressing concrete
This standard specifies the test methods for the tensile, bending, repeated bending, torsion, winding and coating adhesion, isothermal relaxation, axial force fatigue, stress corrosion in thiocyanate solution, deflection tensile, chemical analysis, measurement of geometric dimensions, determination of relative rib area, determination of nominal mass deviation per meter, detection of anti-corrosion grease content, measurement of sheath thickness, coating uniformity, zinc layer quality and so on, of the steel for prestressing concrete.
