bsi 709 dt fusion welded

8/12/2019 BSI 709 DT Fusion Welded

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BSI B S * 7 0 7 83BS 709 : 1983

Contents PageForeword Inside front coverCommittees responsible Back coverMethods1. Scope2, Definitions3 Separation of t e s t specimen4. Heat treatment5. Tensile tests5.1 Transverse tensile t e s t5.2 Cruciform t e s t5.3 All-weld tensile t e s t6, Bend tes ts6.1 Transverse and longitudinal bend t e s t s6.2 Side bent t e s t7. Nick-break e s t8. Fillet weld fracture test9. Macro-examinationIO.11. Charpy V-notch impact t e s t12. Intercrystalline corrosion test13.AppendicesA. Suggested methods of preparing etched

specimensB. Vickers hardness t e s t report for wdded jointsTables1 Dimensions of t e s t specimens for transverseterlsiie test2. Dimensions of t e s t specimens for all-weld

tensile tes t3. Intervals between hardness testing indentationsin the heat-affected zone4. Dimensions and tolerances of tes t specimens

for the Charpy V-notch impact test

Test for hardness across welded joint

Fracture toughness t e s t (K,,/CTOD tes t )

1,)112226771013141516171819

2020

261617

BS 709 1971 has been prepared underection of the Welding Standards Committee.

retains the general pattern of the 1971 edition but hasen modified to take into account developments in thetion introduces an intercrystal-

test, a fracture toughness tes t and a tes t ofness gradient across a weld, BS 709 1971 s

tes ts normallyapplication standards, Tests for theptibility to lamellar tearing, re-heat cracking and

ndards relating to welded constructions in variousof engineering generally include requirements or

tests to be conducted, primarily for thel of welding procedu.es and operators. There i sny technical reason for divergence from standard

edures to be followed for such welding t es t s and theree both practical and economic advantages to be gained

ardization. The main purpose of this standard i s

Figures1. Dimensions of tensile t e s t piece from

complete pipe of outside diameter less thanor equal to 35 mm2 Method of cutting transverse tensile t e s tspecimens from ful l plate thickness

3. Reduced transverse tensile t e s t specimen4. Dimensions of tensile test specimen frompipe of outside diameter greater than 35 mm

5. Radius reduced transverse tensile t es tspecimen6.' Cruciform t e s t piece, specimens and methodof testing

7. Position of all-weld e s t specimens fromdifferent joint types8. All-weld tensile test specimen

9. Method of testing transverse bend t e s tspecimenIO. Method of testing longitudinal bend tes tspecimen1 1 . Examples of specimen location for transverseand longitudinal bend tes ts12. Bend t es t method using a roller

13. Method of testing side bend t e s t specimen14. Examples of specimen location15. Side bend t e s t method using a former16. Side bend tes t method using a roller17. Method of fracturing nick-break e s t

specimen18. Alternative forms of f i l l e t weld tes t pieceand specimens19. Typical tes t specimen for macro-examination

20. Location of hardness t e s t indentations21. Charpy V-notch impact test specimen from

plate or pipe join t22. KI,ICTOD t e s t configuration

Page

3444556688 -99101 11 11213

1415161719

to describe t e s t procedures and to specify requirements ort e s t specimens that should be quoted, or incorporated,in engineering application standards that deal wi th weldedconstructions. Where differences s t i l l exist betweenapplication standards, the methods of tes t given in thisstandard are to be preferred.A general indication i s given of the purpose served by eachof the different tests, but the standard does not purportto lay down when any particular test should or should notbe used; again it does not state the number of specimensto be tested or the repeat tests to be allowed in the eventof failure. Such requirements are matters to be dealt within the particular application standard, where this exists,or to be agreed between the manufacturer and purchaser,It should be realized that variations in the weldingprocedure or the quality of t e s t specimen preparationcan give rise to variations in the tes t resultsCompliance with a British Standard does not of i tselfconfer immunity from legal obligations.

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B S I BS*7 83 l l Lh24hb b7L)Z 3 m

O. 6s 709 : 1983

British Standard Methods ofDestruc t ive test ing fusion w eldedjoints and weld m etal in steel

1. ScopeThis British Standard describes routine destructive methodsof testing fusion welded joints and weld metal in steel(including pipes where appropriate] but does not includenon-destructive examination. It also specifies the shape anddimensions of standard t e s t pieces and specimens fo r thetes ts described.NOTE . The t i t l es of the pu bl icat ions referred to in this s tandardare l isted on the inside back cover.2. Definit ionsFor the purposes of this British Standard, the definitionsgiven in BS 499 : Part It apply together with the followingdefinitions given in BS 499 Part 1 : 1965.2.1 test piece. Components welded together in accordancewith a specified welding procedure, or a portion of awelded joint detached from a structure for fest.2 2 test specimen. A port ion detached from a t e s t pieceand prepared as required o r testing.3. Separation of test specimenThe method employed for the separation of t e s t specimensshall be such as to cause minimum deformation andminimum heating of that part of the t e s t specimen to be

used for measurement. Particular attention shall be paidto this when measurement of proof stress, permanent se tstress or yield stress i s to be made. Machining s usuallythe best method, but when a specimen is sheared orthermally cut an adequate allowance shall be left formachining if necessary.Each t e s t specimen shall be marked so that it i s possibleto identify the exact position in the fabrication or t e s tassembly from which it was taken.4. Heat t reatmentTest specimens shall be heat treated only ifspecified orallowed by the application standard relating to the weldedjoint to be tested. Where possible, they shall be treatedtogether with the welded part. Where this i s not possible,the specimens shall be heat treated separately, the treat-ment and the rate of cooling being similar to that givento the welded part.A hydrogen release treatment shall be applied for thepurpose of testing only in those situations where it spermitted under the conditions specified in the applicationstandard, e.g. BS 639, r the particular weld procedure.Details of any heat treatment applied to the t e s t piecesshall be reported.

*In this s tandard the word pipe alone or in combinat ion is used t o mean pipe or tube or s t ructural hol lowrectangular), al though these terms are of ten used for di f feren t categories of pro duc t by di f feren t industr ies.tu nd er rev ision.

I section (c i rcular or

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__BSI B S * 7 0 9 83 0 1 6 2 4 b b 0 0 b 7 4 3 0 TBS 709 : 1983

5. Tensile tests5.1 Transverse tensile test5.1.1 Principle, The transverse tensile t e s t measures thetransverse tensile strength under stat ic loading of a buttjoint employing but t welds, The reduced transverse testdoes not indicate the tensile strength of the weld metal.Tests on radius reduced specimens induce failure in theweld metal and may give an indication of weld metalproperties, These alternatives are covered in 5.1.2.2nd 5,1,2,3.

5.1.2 Preparation o f test specimen5.12.1 General. The weld reinforcement and penetrationbead shall be removed unless otherwise specified in theapplication standard. The penetration bead shall be leftintact in pipe of outside diameter less than or equal to35 mm (see figure 1 .The t es t specimen thickness, a, i s normally equal to thethickness of the parent metal, S, near the welded joint.It s permissible to take two or more tes t specimens fromthe welded joint to cover the ful l thickness of the jointas shown in figure 2. n such cases, the faces as well asthe sides of the t e s t pieces shall be finished by machiningor grinding, suitable precautions being taken to avoidsuperficial strain-hardeningor excessive heating of thematerial, and the position of each t e s t piece from thejoint thickness shall be identified.5.1.2.2 Reduced specimen. The shape of the tes t specimenshall be as shown in figure 3 or figure 4 and the dimensionsshall be as given in table 1,Table 1. Dimensions o f test specimensfor transverse tensile testDimens ion Symbol

I Lotal lengthMaximum widthof weld

IblWidth of shoulderWidth of parallel length

plates 62pipes 6 2Parallel lengthRadius a t shoulder R

ValuemmTo suit particulartesting machineDependent on weldprocedurebz t 12

25>20> L, + 6050

5.12.3 Radius reduced specimen. The shape and dimen-sions of the t e s t specimen shall be as shown in figure 5.5.1.2.4 Test piece or specimen from pipe. Test piecesconsisting of a complete length of pipe shall have plugsinserted in the ends. The dimensions of the plugs and theirrelation to the dimensions of the t e s t piece shall be asshown in figure 1.For pipe of outside diameter greater than 35 mm, a tes tspecimen having the dimensions shown in figure 4 shall be

2

machined. In this case, if flattening of the gripped ends i snecessary, the possible resulting variations in thicknessshall not affect the parallel length or the shoulder.5.1.3 Procedure. Test the specimen in tension inaccordance with BS 18 : Parts 2,3 and 4 as applicable.5.1.4 Test report, The following shall be reported asresults of the tes t :(a) type of specimen (reduced, radius reduced or

complete pipe) and i t s dimensions;(b) whether the reinforcementwas removed or not;(c) tensile strength ( in N/mm2) calculated from themaximum load and the original nominal cross-sectionalarea, .e. the product of the parent metal thickness andthe width of the specimen;(d) location of the fracture, whether in the weld,in the heat-affected zone or in the parent metal (if thefracture i s in the parent metal, i t s approximate distancefrom the weld junction shall be stated, together with theweld width);(e) the type and location of any flaws present on thefracture surfaces.

Evaluation oft he results of the t e s t shall be in accordancewith the appropriate application standard where this existsfor the weld joint under t e s t or by agreement between thecontracting parties.5.2 Cruciform t es t5.2.1 Principle. The cruciform t e s t determines the relativetensile strength under static loading of fil let welded jointsbetween plates.NOTE , Th is te s t should preferably be supplemented by the useof macro-examinat ion o f cross sections of the jo in t (see clause 9).5.2.2 Preparation of test piece and test specimens. The t e s tpiece shall be made from plate of full thickness. The testpiece and t e s t specimens shall be of the shape anddimensions shown in figure 6. The plate thickness, fil let leglength, welding procedure and penetration shall be asspecified in the appropriate application standard.If macro-examination s to be carried out, the inner edgesof the outer discards shall be prepared in accordance withclause 9.5.2.3 Procedure, Test the specimens in tension with theload applied in the direction indicated in figure 6.5.2.4 Test report. The following shall be reported asresults of the test :a) thickness of parent metal;

(b) hroat thickness and leg length of weld;c) location of the fracture, whether in the weld, in the

heat-affected zone or in the parent metal (if the fracturei s in the parent metal, i t s approximate distance from theweld junction shall be stated);(d) the type and location of any weld flaws present onthe fracture surfaces;(e) description of the appearance of surfaces subjectedto macro-examinationand the type and location of anyweld flaws present.



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BSI B S * 7 0 9 8 m L b 2 4 b b 9 0067433 3 mBS 709 : 1983

V - Ja ws o ftest ing machinel ug t o be insertedin t o each end o f p ipe \

-E.--

c.-Eav

-c.-Ea-c.-EQ

NOTE 1. D s the diameter of the plug.NOTE 2. Externa l we ld re in fo rcement to be dressed f lush w it h paren t metal .NOTE 3. Penetrat ion bead to be eft intact .Figure 1. Dimensions of tensile tes t piece fro m com plete pipe of outside diameter less than or equal to 35 mm

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S 709 : 1983

S i s the th ickness of the jo int ;a i s the thickness of the test specimen.Figure 2. Meth od of cut ting transverse tensile tes t specimens fro m ful l plate thickness

II 13 I IjI

Figure 3. Reduced transverse tens ile t e s t specimenR e d u c e d

4. Dimensions of tensile tes t specimen from pipe of outside diameterthan 35 mm 64



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BSI BS*709 83 m 3 b 2 4 b b 0067433 5 m

bsi 709 dt fusion welded

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