ﺍﻟﻌﺭﺒﻴﺔ ﺍﻟﺨﻠﻴﺞ ﻟﺩﻭل ﺍﻟﺘﻌﺎﻭﻥ ﻤﺠﻠﺱ ﻟﺩﻭل ﺍﻟﺘﻘﻴﻴﺱ  ﻫﻴﺌﺔ 
GCC STANDARDIZATION ORGANIZATION (GSO) 
 
 
 
 
 
 ﻤﺸﺭﻭﻉ: ﻨﻬﺎﺌﻲ  
 
 
 
GSO 2/1 /FDS/ISO 6310 : 2010 
ISO 6310/ 2009 
 
 
 
 
 
 
 
 
 
 
 
 ﺍﻟﺴﻴﺎﺭﺍﺕ– ﻁﺎﻨﺎﺕﺒﺍﻟﻤﻜﺎﺒﺢ –ﺭﻴﻘﺔﻁﺍﺨﺘﺒﺎﺭ ﺍﻨﻔﻌﺎل ﺍﻻﻨﻀﻐﺎﻁ  
Road vehicles -- Brake linings -- Compressive strain test methods   
 
 
 
ﺇﻋﺩﺍﺩ 
 اﻟﻔﻨﻴﺔ واﻹﻃﺎراتاﻟﻠﺠﻨﺔ  اﻟﻤﺮآﺒﺎت  ﻣﻮاﺻﻔﺎت  ﻟﻘﻄﺎع اﻟﻔﺮﻋﻴﺔ  اﻟﺨﻠﻴﺠﻴﺔ  
 
 
 
 
 
  ﻤ ﺍﻟﻭﺜﻴﻘﺔ ﻫﺫﻩ              ﻟـﺫﻟﻙ ﺒـﺸﺄﻨﻬﺎ،  ﻭﺍﻟﻤﻠﺤﻭﻅﺎﺕ  ﺍﻟﺭﺃﻱ ﻹﺒﺩﺍﺀ ﺘﻭﺯﻴﻌﻬﺎ  ﺘﻡ ﺨﻠﻴﺠﻴﺔ ﻗﻴﺎﺴﻴﺔ ﻟﻤﻭﺍﺼﻔﺔ  ﺸﺭﻭﻉ
               ﻤﻥ ﺍﻋﺘﻤﺎﺩﻫﺎ  ﺒﻌﺩ ﺇﻻ ﺨﻠﻴﺠﻴﺔ ﻗﻴﺎﺴﻴﺔ ﻜﻤﻭﺍﺼﻔﺔ  ﺇﻟﻴﻬﺎ ﺍﻟﺭﺠﻭﻉ  ﻴﺠﻭﺯ ﻭﻻ ﻭﺍﻟﺘﺒﺩﻴل،  ﻟﻠﺘﻐﻴﻴﺭ ﻋﺭﻀﺔ ﻓﺈﻨﻬﺎ
ﺍﻟﻬﻴﺌﺔ ﺇﺩﺍﺭﺓ ﻤﺠﻠﺱ  .   
 
 
Foreword 
 
GCC Standardization Organization (GSO ) is a regional Organization which 
consists of the National Standards B odies of GCC memb er States. One of 
GSO main  functions is to issue Gulf Standards through specialized technical 
committees (TCs). 
GSO through the technical program of  committee TC No.:2-1 " The Gulf 
technical Subcomm ittee for vehicles and tyres standard s " has updated the 
GSO Standard No. : 6310 : 2007" Ro ad vehicles -- Brake linings -- 
Com pressive strain test methods "   
The Draft Standard ha s been prepared by Ki ngdom  of Saudi Arabia.   
This standard has been approved as Gu lf Standard by GSO Board of Directors 
in its meet ing No..../....  …… .held on    /    /   /  H ,  /     /  Th e approved 
standard will replace and supersede the standard No. (  GSO ISO 6310:2007   
/     )   
 
 GULF  STANDARD GSO ISO 6310/20 10
 
ROAD VEHICLES – BRAKE LININGS — 
COM PRESSIVE STRAI N TES T M ETHOD 
 
1. SCOPE A ND FIELD  OF APPLICATION 
 This Gulf  standard spec ifies a m ethod for test and 
measurem ent of the co mpressive displacem ent of brake linings 
or brake pad assem blies due to lo ading and temper ature. It also 
provides a test method to as sess lin ing the rmal sw ell and  
grow th. 
 This Gulf Stan dard app lies to disc  brake pad as semblies or 
coupon sam ples cut f rom the f riction material. 
 
2.      COMPLEME NTARY REF ERENCES 
2.1 Gulf Standard   GSO ISO 611 “Road vehicles — Braking of 
autom otive vehicles and their trailers — Vocabulary”  
 
3. TERMS AND DEFINITIONS 
3.1             compressibility ( C) 
change  in pad thi ckness or deflection , cau sed by a uniaxial 
compression load du ring the fin al lo ading cy cle, to th e 
maximum t est pre ssure, which is  me asured in the sa me 
direction as  the com pression f orce, perpendicular to th e friction 
surface. 
3.2 Compressiv e strain (ε) 
 Ratio of the reduction in thic kness of the brake lining, due to 
compressive load, to its initial thickness, which is m easured in the 
direciton of the application force, perpendicular to the friction 
surface. 
3.3             deflection (D) 
net deflection of the sam ple as a result of the subtraction of the 
deflection of the apparatus itself from  the total deflection m easured 
by the apparatus 
     D = D tot - D app 
where  
Dtot  is the total deflection m easured by the apparatus; 
Dapp is the deflection of the apparatus itself 
 
 
 
 1GULF  STANDARD GSO ISO 6310/20 10
 
3.4          f riction material contact area ( AO) 
measure of the area of friction m aterial that carries the test load 
NOTE  It is advisable that slots, cham fers and any other 
features be accounted for in determ ining AO. 
3.5          hot compressibility ( C400 ) 
compressibility with a heated platen tem perature of 400 °C 
3.6          temperature transfer ( TT ) 
temperature rise at the backing plate of a brake pad assem bly 
after the friction surface has been  in contact with the heating 
plate at (400 ± 10) °C for a given period at a given pressure 
    TT = T3 − T2  
Where  
T3  is the f inal tem perature of  the backing plate during the hot 
test; 
T2 is the initial tem perature of  the backing plate f or the hot  test 
3.7          pad thermal grow th ( dG ) 
perm anent change in thickness of  the sam ple af ter the f riction 
surface has been in contact with the heating plate at (400 ± 10) 
°C for a given period at a given pressure and then cooled down 
to room  tem perature 
3.8          pad thermal sw ell ( dS ) 
change in thickness of the sam ple after the friction surface has 
been in contact with the heati ng plate at (400 ± 10) °C for a 
given period at a given pressure 
 
4. SYMBOLS AND UNITS 
 Table 1 lists the sym bols and corr esponding units used in this Gulf 
standard 
 
 2GULF  STANDARD GSO ISO 6310/20 10
 
Table 1 – Symbols and units 
 
Symb ol Definition Unit Accu racy
A0 friction material cont act area cm20.5 cm2
C Compressibilityaµm 1 µm   
C400 hot com pressibility µm 1 µm  
d average thickness of coupon sam plebMm 0.1 mm 
dG pad grow th or therm al expansion back at 
ambient tem peratu re µm 1 µm 
dS pad swell o r thermal expansion µm 1 µm 
D net deflection of test sam plecµm 1 µm 
Dapp deflection of the test  apparatus itself at pAdµm 1 µm 
Dtot total def lection  measu red by th e test 
apparatus at the maximu m test pressure µm 1 µm 
FB Pre-load MPa e1% f
FP Test load MPa e1% f
pA test pressure at sa mple contact area or unit 
area p ressure gMPa e1% f
pD simulat ed hydra ulic line pressure hMPa e1% f
T1 test temperature of t he heat ing plat e for hot 
test oC ± 2 oC 
T2 initial tem perature of the back ing plate fo r hot 
test oC ± 2 oC 
T3 final te mper ature of the  backing pl ate during 
hot test oC ± 2 oC 
TT temper ature t ransfer  oC 2% 
εpA compressive strain at pA i-- 0.0002 
a   D at pD. Used in test  method B. 
b  Avera ge of five measurem ents. 
c   Dtot - D app. 
d  No samp le in stalled. 
e  1 bar = 0,1 MPa.  
f  1 % full-s pan accurac y. 
g  Test m ethod A . 
h  Test method  B. 
i  D/d. Used i n test method A.  
 
5. PRINCIPL E 
5.1 Gen eral 
                The tes t measures eith er: 
- the com pressive stra in of a friction m aterial coupon (test 
method A ), or 
- the com pressive def lectio n of a brak e pad as sembly (tes t 
method B ). 
 3GULF  STANDARD GSO ISO 6310/20 10
 
Depending upon the type  of sam ple, one of two alternative test  
methods is followed for applying the tes t load. 
Test results from  test m ethod A and test  method B should not  
be directly com pared. 
5.2 Test meth od A — C oupon sa mple and /or airbrake pad 
Test m ethod A loads a sam ple coupon to th e force required to 
achieve a unit-area p ressure at the con tact interface. Te st 
method A  can be used to assess  pad m aterials for drum  brake 
assemblies, comme rcial vehicle disc or drum  brakes and  
material coupons for research  and developm ent purposes. 
For large pads used on a comm ercial vehicle, m easure th e 
compressive str ain at the lef t and th e right halves separately or 
use a segment cut in th e radial direction. In  other cases, sample 
sizes should be larg e enough to account fo r material not being 
homogeneous. Sur faces of coupon samples should be fl at and 
parallel. 
Unle ss otherwise specified, re port the com pressive s train valu e, 
εpA. 
5.3 Test meth od B — Hyd raulic disc brake pad assembly 
Test method B lo ads th e brake lin ing assembly to s imulate a 
hydraulic line pressure of 10 MPa (100 b ar) or 1 6 MPa (160 
bar). 
NOTE  In comm on practice, the li ne pressure is expressed in 
bar in o rder to diffe rentiate it from the f ace pr essure at  the 
contact area. Test m ethod B is ty pically used for passenger ca r 
and light truck hydra ulic disc brake pad assembl ies. 
Unle ss otherwise specified, re port the compressive deflection 
or compressibility va lue, C, in µm. 
 
6 Test apparatus 
The test apparatus shall consist of  the follow ing. 
6.1 Compressibility test-stand  or uniaxial material-testing load     
frame  to p rovide a u niform load ove r the surf ace of the tes t 
sample. 
6.2           Loadi ng cyli nder to simulate 
- a calliper piston conf iguration for test method B ; 
- loading ram  surface larger th an the sample con tact area fo r 
test method A. 
 
 
 4GULF  STANDARD GSO ISO 6310/20 10
 
6.3 Comp ression p laten. 
6.4       D evice to measur e the appl ied com pression force to an accur acy 
of 1 % of full-scale of  the tes t apparatu s. 
6.5       Gauge  to measu re the tim e-bas ed deflection of  the sa mple with an 
accuracy of  0,001 mm . Position the gauge on the loading cylinder 
or on the platen and in contact with th e loading ram  as near to its  
centre line as po ssible. 
6.6    Reco rding device  or comp uter  to log load, pressure, 
displ acements and temper atures as function of tim e. 
6.7      Heating device to raise the tem perature of the platen to a sp ecified 
temper ature. 
6.8       Thermocou ple (1,5 m m diam eter recom mended ) to m easu re the 
temper ature of t he pl aten. The position of the therm ocouple 
should be as clos e as pos sible to the cen tre lin e of the lo ading 
ram and embedded 3 mm  below th e tes t surface of th e platen. 
6.9      Th ermocoup le or device to measure th e tem peratu re of the tes t 
sample. 
6.10      Micrometer  to me asure sample thickness. 
 
7. Test stand specifica tions 
7.1 Load ing 
7.1.1  Test method A 
Recomme nded maximum pressure and pre ssure ram p rates are 
listed in T able 2. W hen d etermining ac tual sam ple contact area 
and cont act face pressure, rem ove the areas of any slots, 
cham fers and h oles. 
Table 2  — Max imum con tact face p ressu re and ra mp 
rates for test me thod  A 
 
 
Type of brake assem bly Maxi mum pr essure 
at 
conta ct interfa ce 
MPa Appl y pre ssure 
ram p rate 
MPa /s Apply rate in 
crosshead 
speed co ntrol 
mm/ min 
Commercial 
vehicle disc 8a4.0 ± 0.5 15 
Comme rcial 
vehicle drum 5 2.5 ± 0.5 10 
Drum br ake 
linings 3 1.5 ± 0.5 6 
a  For large pads, 5 MPa is an alternative pressure us ed. 
 5GULF  STANDARD GSO ISO 6310/20 10
 
7.1.2     Test method B 
Apply a force corres ponding to a sim ulated hydraulic line 
pressure of 10 MPa (100 ba r) or 16 MPa (160 bar). T he 
pressure used sh all be  clearly identified o n the test report. The 
recom mended loading rate  is 8 MPa/s (80 bar/ s) simulated line 
pressure w hen testing in constant  loading rate co ntrol, or 15 
mm/min when  testing in c rosshead speed control. 
7.2 Heated pla ten 
For the hot test, the tes t tem perature of the heating plate, 
T1, on the surface shall be (400 ± 10) °C. 
7.3 Load ing ram 
7.3.1  Test meth od A — C oupon sample 
The face of th e loadin g ram  shall be flat and the peri phery shall 
at le ast circumscribe the periphery of the sample in o rder to 
distribute the load uniform ly over  the sur face (see Fi gure 1). To 
calculate the unit- area pressure, u se the actu al frictio n material 
area in con tact with th e mating f ace. 
For com mercial ve hicle (CV ) pad s, the standard lo ading ram  is 
an annular piston shap e with a 60 mm outer diam eter and a 5 0 
mm inner ring diam eter. 
7.3.2  Test method B — D isc brake pad assembly 
A fixture representing a piston is introduced betw een the r am 
and the friction m aterial pad, s uch th at th e load ing surface h as 
the same form (e.g. soli d or annular piston)  and l ocation as  the 
actual contact  surface of t he calli per piston in which the pad 
will b e used in s ervice, or alternatively an agreed p osition th at 
provides reproduci ble me asurements (see Figure  2). I f the 
intended brake sys tem has a callip er w ith m ore than one piston, 
use an ad equate p iston-shaped loading fixtur e. Altern atively, an  
agreed piston a daptor differe nt from t he brake de sign c an be  
used in order to provi de reprodu cible m easurements. 
 
8. Sampling 
8.1 It is recom mended that a m inimum of five sam ples be m easured  
at room  tem peratu re, and  three s amples at el evated temper ature. 
8.2 To a void infl uencing t he test results, the flatness and su rface 
roughness of the sam ple should be the same  as that of  norm al 
production. 
8.3 When te sting to m easure friction m aterial properties, it is 
recom mended that backing m aterial s, su ch as anti-no ise sh ims 
or rubber coatings, be rem oved prior to testing, and this 
information  should be reported. 
 6GULF  STANDARD GSO ISO 6310/20 10
 
8.4 For accurate m easurem ents, parts s hould be stabilized at     (23 
± 5) °C and (50 ± 10) % relative hum idity before testing. 
Record and report environm ental test conditions. 
 
9. Test method 
9.1 Gen eral set-up 
9.1.1  Ensu re that th e tes t stand is  properly ca librated.  
9.1.2  In the case of passenger  car disc brake linings (test method B), 
measure th e thickness of the s ample at five point s (see Figu re 
4) using a m icrom eter. Calcul ate the aver age value of the 
thickness, d. 
If the pad sample contai ns slots, ta ke the measurements as 
shown in F igure 4 b). 
9.1.3  In the case of disc brake pa ds, m easure the backing plate  
thickness and su btract it f rom the av erage sam ple th ickness. 
Reco rd only the frictio n material thickness, d. 
9.1.4  Measu re and reco rd no minal sampl e cont act area, A0. 
9.1.5  Place t he sampl e on the pl aten at  room t emper ature [(23 ± 5) 
°C] wit h its fri ction sur face agai nst the surface of t he plat en 
with the ram  and pist on fixture correctly lo cated.  Ensure th at 
the location of the piston fixture is consis tent with the locatio n 
on the actual application in order to ensure repeatability of test 
results. 
 
9.2 Room temperatu re compressibility te st 
9.2.1  Pre-load to t he force value that  corr esponds t o 0,5 MPa (5 bar) 
hydraulic system  pressure, or 0,5 MPa cont act face pr essure, 
and hol d for no more than 5 s. 
9.2.2  Set the displa cement gauge to zero w hile the sample is held at 
pre-lo ad. 
9.2.3  Perform three loading and un loading cycles star ting from t he 
pre-lo ad. 
NOTE    A cycle c onsists of increas ing to the m aximum pressure at  
the rate re quire d, the n unloa ding at the sam e rate to t he pre-load 
value. 
Figure  5  illustra tes the  test cycle. 
9.2.4  Measu re displacem ent and lo ad (o r pressure) during the loading 
cycles. If  com puter data acqu isition is ava ilable, it is 
recom mended that continuous disp lacem ent versus pressure 
(and lo ad) be re corded. Re cord and report displacem ent at the 
maximum pressure on t he first cycle and last cycle. In addition, 
 7GULF  STANDARD GSO ISO 6310/20 10
 
on th e las t cycle, read ings should be record ed at  several poi nts 
whil e the pressure i ncreases ( see Figure 5 fo r the measurements 
to be ta ken and recorded). 
 
9.3 Temperature transfer and thermal expansion 
measurements 
9.3.1  Install a th ermocouple in the p ad backing plate, as shown in  
Figure  3. It s hall be posi tioned in the centre of t he pist on area,  
but outside of hole s or sim ilar in  the back ing plate.   
9.3.2  Rem ove the sam ple and lo ading ram  ada pter (piston) from the 
compr ession plat en. Pr eheat  the platen to a stab ilized su rface 
temperature of (400 ± 10) °C. Wait at le ast 30 min to stabilize 
the temper ature. 
9.3.3  Install th e loading ra m adap tor, whic h sho uld b e at ambient 
temper ature. 
9.3.4  Imm ediately after step  9.3.3, place the sam ple (which should be 
at am bient tem peratu re) on the heated plat en. Record the initi al 
temper ature, T2, of the backing plate. A pply the pre- load of 0,5 
MPa (5 bar). 
9.3.5  Set the  displacement gauge to zero. 
9.3.6  Reco rd the final tem peratu re at the backing plate, T3, after   10 
min ± 10  s for p assenger car brake pads, or  after 15 mi n ± 10 s 
for com mercial v ehicle brak e pads, at  the test pressure. 
9.3.7  Reco rd the cha nge in s ample pad thickness after 10 min ± 10  s 
for passenge r car brake pads or  15 min ± 1 0 s fo r comm ercial 
vehicle brake pads at the test pressure. 
 
9.4 Hot compressibility test 
9.4.1  If steps 9.3.2 to 9.3.7 have been followed, proceed dir ectly to 
9.4.2; if not, first foll ow 9.3.2 to 9.3.7 above. 
9.4.2  Reset the displacemen t gauge to ze ro. 
9.4.3  Perform two compre ssion c ycles, us ing t he same loading 
param eters as for room  tem peratu re cycles . 
9.4.4  Rem ove th e test sample from the test stand and allow it to cool 
to am bient tem perature. 
9.4.5  Measu re the pad th ickness at the locations in F igure 4, and 
report sam ple grow th, dG, if required. 
 
 
 
 8GULF  STANDARD GSO ISO 6310/20 10
 
10. Test  devi ce defl ection co mpen sation 
It is known t hat duri ng compressive testing of friction m aterial, 
the tes t device itself will a lso deflect. Th is disp lacement of the 
test apparatus under load, Dapp, sha ll therefore be subtr acted 
from the total meas ured di splacement during the  test, Dtot, in 
order to determine the net displacement of the f riction material 
sample, D, as shown in Equation (1): 
         D =  Dtot −  Dapp                                                     (1) 
This com pensation can be done automatically or manually. 
Measu re Dapp as a function of pressure  by lo ading the r am with 
the pis ton in p lace ag ainst the base platen without a sam ple 
installed. 
NOTE   Alternatively, a stiff, har dened steel pla te with known force-
deflec tion can be used as a dum my sample to  protect the base  platen. 
Autom atic disp lacem ent com pensation can then  be p erform ed 
as a function of pressure. Alte rnatively, a m anual subtraction of 
the m achine deflectio n can be perform ed on the m aximum 
pressure deflection re ading for each test. 
 
11. Verification of  the test stand u sing referen ce sa mples 
A regular test should be done w ith a referen ce sample such as a 
Hottinger force gauge housing  C2/ 50 kN (J urid) or a  
Veri fication Standard Spring  (LINK) with a suitable 
posit ioning tool and rea sonable  test parameters. 
EXAMPLE 1   Test c onditions  for J urid m achines:  
- FB = 1,6 kN; 
- FP = 50 kN  ; 60 kN; 
- F/t = 25 kN /s; 
- 2 cycl es. 
EXAMPLE 2 Test conditions for LINK machines: 
- FB = 3,0 kN; 
- FP = 59,5 kN; 
- F/t = 3 5 kN/s; 
- 3 cycl es. 
If there is a di ffere nce of mor e than 5 µm between  the referen ce 
sample and i ts expect ed val ue, check t he accuracy of t he force 
measuring device, accuracy of the displacement gauge, and 
flatness of  the test platen. 
 
 9GULF  STANDARD GSO ISO 6310/20 10
 
12. Test report 
Annex A presents a sample test re port. Other form ats are acceptable 
provided they include at leas t the f ollowing inf ormation: 
 
a )  m anufacturer and ref erence n ame/num ber of brake lining including 
batch reference; 
 
b )  type of sam ple, reference to any additional coatings, shim s, etc.; 
 
c )  size of the sam ple pad area; 
 
d )  num ber of sa mples tested; 
 
e )  assem bly thickness mm to an accuracy of 0, 1 mm  and thickness of 
friction m aterial; 
 
f )  piston size, inner and outer ring di ameter (in the cas e of a disc pad); 
 
g )  piston position relative to the pa d if deviating from  the centre -line 
position ; 
 
h )  test m ethod used (A or B); 
 
i )  average value for ambient com pressibi lity or com pressive stra in for all  
samples tested; 
 
j )  ave rage value f or hot com pressibi lity o r com pressiv e strain f or all 
samples tested; 
 
k )  am bient tem perature and hum idity (if required). 
 
 
 
 
 10GULF  STANDARD GSO ISO 6310/20 10
 
  
Key 
1 Load 
2  Ram  
3  test sam ple with m aximum thickness possible 
4  Heating plate 
a  A larger sam ple is allowed for friction materials for commercial-vehicle 
disc-brake pads. 
 
Figu re 1 – Coupon samp le 
  
Key 
1 Load 
2  Ram  
3  Test sam ple 
4  Heating plate 
 
Figu re 2 – Disc b rake pad assembly 
 11GULF  STANDARD GSO ISO 6310/20 10
 
 
 
Key 
1  therm ocouple tip 
2  backing plate 
3  friction m aterial 
Figu re 3 – Thermocoupl e location for  heat tran sfer man agement 
 
  
 
 
Figu re 4 – Samp le me asurem ent gui delines 
 a) Without sl ot 
b) Slotted pad 
 12GULF  STANDARD GSO ISO 6310/20 10
 
 
 
 
Key 
t       tim e, in s 
PA    pressure, in MP a (1 bar = 0,1 MP a) 
FB    pre -load, in M Pa 
FP     test load, in M Pa 
A      point at wh ich reading is taken 
C1, C 2, C 3    addi tional me asurement point s (indicated f or pad assemblies only) 
a) Test method A 
 
Figure 5 :  ( continued )   
  
 
 
 
 
   
 13GULF  STANDARD GSO ISO 6310/20 10
 
 
 
 
Key 
t       tim e, in s 
PD    sim ulated hydraulic pressure, in MPa (1 bar = 0,1 MPa) 
FB    pre-load, in MPa 
FP    test load, in MPa 
A      point at which reading is taken 
B      alternative test pressure of 10 MPa (100 bar) (see 5.3) 
C4, C 5, C 6, C 7     additional m easurem ent points (indicated for pad 
assem blies only) 
b) T est method  B 
 
Figu re 5 — Compressive strain RT test cycl e for 16 MPa (160 bar) 
 
 
 
 
 
 14GULF  STANDARD GSO ISO 6310/20 10
 
Annex A 
                (informative) 
          E xample test  report  
 
   Test method (A) Test method (B ) 
Param eter  Unit area  pressure Line  pressur e 
  MPa MPa 
  (unless otherwise specified) (unless otherwise specified) 
Preload  0.5 5 
Load rate  4 MPa/s 8 MPa/s 
Pad 8 16 or 1 0  
Maximum load 
(expressed in press ure ) Lining  3 6 
Pad 1 2 4 8 2 4 8 16  
Measurem ent sta ge Lining 1.5 3   3   6 
  
Room  tem peratu re tes t 3 3  
No, of cycles Hot test 2 2 
Pad    
Sam ple size  Lining    
Ram  type: Flat surface:  Actual piston:  
Test data :    
Nam e of test er:    
Reference  num ber:    
Lining man ufacturer:    
Lining referen ce:    
Batch identification:    
Sam ple type:    
Specia l coatings, shim s 
etc.:    
Sam ple size:    
Assem bly thickness di (mm)    
Lining th ickness (mm):    
Number of samples:    
Piston size :    
Test m ethod adopted (A  or B)   
 15GULF  STANDARD GSO ISO 6310/20 10
 
Test m ethod A Test m ethod B  
Com pressive strain PA
MPa  
εpAPA
MPa C 
µm 
 
 
 
Ambient 
Pad ( lining) 
first and third cycles 8(3) 
1(1.5) 
2 
4 
8(3)  10 
16 
10 
16 
__  
Hot 
Pad ( lining) 
first and second cycles   
8(3) 
1(1.5) 
2 
4 
8(3)   
10 
16 
10 
16 
__  
Heat transfer maximum temperature: 
Therm al expansion: m ax. …… m in. …… end …… ( µm) 
Characteris tic curves at tached ? (Yes / No) : 
 
 
 
 
 
 
 
 
 
 
 
 
 
 16