GB/T 21839-2008 (English Version) PDF

Standard No.: GB/T 21839-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2020-05
Replace By: GB/T 21839-2019
Latest: GB/T 21839-2019

Scope: This standard specifies the test methods for tensile, bending, repeated bending, torsion, winding, isothermal relaxation, fatigue, stress corrosion, deflection tension, chemical analysis, geometric dimension measurement and relative rib area determination of steel for prestressed concrete. This standard is applicable to the determination of relevant properties of prestressed steel wire, steel rod, steel strand and other products

GB/T 21839-2008 Referenced Document

GB/T 12160-2002 Calibration of extensometers used in uniaxial testing (ISO 9513:1999,Metallic materials--Calibration of extensometers used in uniaxial testing, IDT)
GB/T 16825.1 Metallic materials—Calibration and verification of static uniaxial testing machines—Part1:Tension/compression testing machines—Calibration and verification of the force-measuring system*， 2022-10-14 Update
GB/T 228 Metallic materials--Tensile testing at ambient temperature
GB/T 230.1 Metallic materials.Rockwell hardness test.Part 1:Test method*， 2018-05-14 Update
GB/T 232 Metallic materials - Bend test methods*， 2024-03-15 Update
GB/T 238 Metallic materials.Wire.Reverse bend test*， 2013-09-06 Update
GB/T 239 Metallic materials--Wire--Torsion test
GB/T 2976 Metallic materials—Wire—Wrapping test*， 2020-12-14 Update
GB/T 3505 Geometrical Product Specifications(GPS).Surface texture:Profile method.Terms,definitions and surface texture parameters*， 2009-03-16 Update