ASTM_G_58_-_85_2015.pdf

Designation:G5885(Reapproved 2015)Standard Practice forPreparation of Stress-Corrosion Test Specimens forWeldments1This standard is issued under the fixed designation G58;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures for the making andutilization of test specimens for the evaluation of weldments instress-corrosion cracking(SCC)environments.1.2 Test specimens are described in which(a)stresses aredeveloped by the welding process only,(b)stresses aredeveloped by an externally applied load in addition to thestresses due to welding,and(c)stresses are developed by anexternally applied load only with residual welding stressesremoved by annealing.1.3 This practice is concerned only with the welded testspecimen and not with the environmental aspects of stress-corrosion testing.Specific practices for the bending and load-ing of test specimens,as well as the stress considerationsinvolved in preparation of C-rings,U-bend,bent-beam,andtension specimens are discussed in other ASTM standards.1.4 The actual stress in test specimens removed fromweldments is not precisely known because it depends upon thelevel of residual stress from the welding operation combinedwith the applied stress.A method for determining the magni-tude and direction of residual stress which may be applicable toweldment is described in Test Method E837.The reproducibil-ity of test results is highly dependent on the preparation of theweldment,the type of test specimen tested,and the evaluationcriteria used.Sufficient replication should be employed todetermine the level of inherent variability in the specific testresults that is consistent with the objectives of the test program.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.(For more specificsafety hazards information,see Section 7.)2.Referenced Documents2.1 ASTM Standards:2E8 Test Methods for Tension Testing of Metallic MaterialsE399 Test Method for Linear-Elastic Plane-Strain FractureToughness KIcof Metallic MaterialsE837 Test Method for Determining Residual Stresses by theHole-Drilling Strain-Gage MethodG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG30 Practice for Making and Using U-Bend Stress-Corrosion Test SpecimensG35 Practice for Determining the Susceptibility of StainlessSteels and Related Nickel-Chromium-Iron Alloys toStress-Corrosion Cracking in Polythionic AcidsG36 Practice for Evaluating Stress-Corrosion-Cracking Re-sistance of Metals and Alloys in a Boiling MagnesiumChloride SolutionG37 Practice for Use of Mattssons Solution of pH 7.2 toEvaluate the Stress-Corrosion Cracking Susceptibility ofCopper-Zinc AlloysG38 Practice for Making and Using C-Ring Stress-Corrosion Test SpecimensG39 Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test SpecimensG44 Practice for Exposure of Metals andAlloys byAlternateImmersion in Neutral 3.5%Sodium Chloride SolutionG49 Practice for Preparation and Use of Direct TensionStress-Corrosion Test Specimens3.Summary of Practice3.1 The following summarizes the test objectives that maybe evaluated:3.1.1 Resistance to SCC of a total weldment(weld,heat-affected zone,and parent metal)as produced by a specificwelding process;3.1.2 Resistance to SCC of deposited weld metal;3.1.3 Determination of a stress level or stress intensity thatwill produce SCC in a weldment;1This practice is under the jurisdiction of ASTM Committee G01 on Corrosionof Metals and is the direct responsibility of Subcommittee G01.06 on Environmen-tally Assisted Cracking.Current edition approved Nov.1,2015.Published December 2015.Originallyapproved in 1985.Last previous edition approved in 2011 as G5885(2011).DOI:10.1520/G0058-85R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.4 Evaluation of SCC failure in the specific zones of aweld(weld metal,partially melted zone,weld interface,heat-affected zone,and base metal);and3.1.5 Evaluation of the effect of notches and stress raisers inweldments.4.Significance and Use4.1 The intent of this practice is to indicate standard weldedspecimens and welding procedures for evaluating the SCCcharacteristics of weldments in corrosive environments.Thepractice does not recommend the specific corrosive media thatmay