IS 210.pdf

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IS 210 : 1993

~~ ~T~ CPT~~T~lfT

- fqfwftSc;

( 'tfT~r ~;:nJ~ )

In dian S tandard

GREY IRON CASTING S-SPECIFICATION

( F ourth R evision)

U DC 6 69 '1 31 '6 -1 4

<0 BIS 1993

BUREAU OF INDIAN STANDARDS

MANAK BHA V AN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

D ecem ber 1993

P rice G ro up

5

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Pig Iron and Cast Iroll Sectional Commiltee, MTD 6

FOREWORD

This Indian Standard ( Fourth Revision) was adopted by the Bureau of Indian Standards, after the draft

finalized by the Pig Iron and Cast Iron Sectional Committee had been approved by the Metallurgical

E ngineering D ivision C ouncil.

This standard was first published in 195 and subsequently revised in 1962, 1970 and 1978. While

review ing ,this standard in the light of the experience gained during these years, the committee decided to

revise it to align w ith the present practices followed by the Indian industries and to bring it in line w ith

the other overseas standards.

The various diameters of test bar according to the section size of the castings have been replaced by a

single size of test bar. Guidance on the effect of section size of the casting on the tensile strength is, how-

ever, given in Annex A . A comparison between grades is given in Annex B.

The production of castings in the higher grades of grey cast iron often involves special techniques. It is

r( commended, therefore, that for either large or intricate caslings or a casting involving both these condi-

s, or where the castings have to withstand exception conditions, the grade of grey c, st iron selected and

any heat treatment involved should be agreed between the manufacturer and the purchaser. The higher

grades of grey cast iron ( that is, Grade FG300, FG350 and FG400 ) present special difficulties for section

10 mm and thinner.

For the benefit of the purchaser, typical properties of grey cast iron have been added in Annex C.

Information to be supplied by the purchaser while ordering grey iron castings according to this specification

is given in Annex D .

In the formulation of this standard assistance has been derived from ISO 185 'G rey Cast Iron

-

Specifi-

cation' issued by International O rganization for Standardization.

For the purpose of deciding whethn a particular requirement of this standard is complied w ith, the final

value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordanc~

with IS 2 : 1960 'Rules for roundiDg off numerical values ( revised)'. The number of significant places

retained in the rounded off value should be the same as that of the specified value in this standard.

,

I

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IS 210 : 1993

Ind ian Standa rd

GREY IRON CASTINGS -- SPECIFICATION

1 SCOPE

( F ourth R evision)

This standard covers the requirements for grey

i ro n c as ti ng s.

2 R EF rR EN CE S

The following Indian Standards are necessary

adjuncts to this standard:

IS No.

1387: 1993

1500 : 1983

2078: 1979

4843 : 1968

5139 : 1969

5519: 1979

I

]

3655 : 1993

Title

General requirements for the

supply of m etallurrgical m aterial

( secolld revis ion )

.

Method for BrineJl hardness test

for metallic materials (second

r ev is io n )

Method for tensile testing of

grey cast iron

( fi rs t r ev is io n)

Oode for designation of ferrous

castings

Recommended procedure for

repair of grey iron castings by

oxyacetylene and manual metal

a rc w eld in g

Deviations for untoleranced

dimensions of grey iron castings

f i r s t

revIsion)

Guidelines for heat treatment

of cast iron

3 SUPPLY OF MATERIAL

General requirements relating to the supply of

grey iron castings sha II be as laid down in

IS 1387: 1993.

4 G RA DE S

There shall be sellen grades of grey iron castings

nam('ly, G rades FG150. FG200, FG220, FG260,

FG300, FG350 and FG 400.

5 M A NU FA CT UR E

The castings shall be made by any process, as

agreed between the supplier and purchaser, that

will produce castings com plying w ith the require-

ments of this Indian Standard and shall be in

accordrnce w ith the pattern or working draw ing

as supplied by the purchaser.

6 CHEM ICAL COM POSITION

6.1 The composition of cast iron shall be left to

the discrecion of the manufactU rer, bu.t a maxi-

mum limit for phosphorus and/or sulphur may

be specified by the purchaser, if he so desires.

6.2 In case of special castings, the' detailed

chem ical composition shall be as agreed to be-

tween the purchaser and the m anufactur.er.

7 WORKMANSHIP AND FINISH

7.1 The castings shall be accurately moulded in

accordance w ith the pattern or working draw ings

supplIed by the purchaser, w ith the addition of

such letters, figures or marks as may be specified.

7.2 The purchaser shall specify tolerances,

m achining location and allowances with reference

to all important dimensions On other dimensions

tO lerances specified in IS 5519 : 1979 shall apply.

8 HEAT TREATMENT

Oastings are generally supplied w ithout having

any heat treatment. However, if required by the

purchaser, the heat treatment may be carried out

in accordance with 2 of IS 13655 : 1993,

9 M IC R OSTR U CTUR E

Where so required, the m icrostructure of grey

iron castings and the location for taking the

sample shall be as agreed to between the purcha-

ser and the m anufacturer.

10 FREEDOM FROM DEFECTS

10.1 The castings shall be sound, clean and free

from porosity, blow holes, hard spots, cracks, hot

tears, coldshU ts, distortion, sand and slag inclu-

sions and other harmful defects. They shall be

well-dressed and fettled; and shall be readily

machinable.

10.2 No welding or repairs shall be carried out

w ithout the prior perm ission of the purchaser.

W elding referred to here includes fusion welding

in accordance with the common foundry practice.

The method of repair by welding s e e IS 5139 :

1969) and subsequent stress-relieving shall be

as agreed to between the purchaser and the

manufacturer.

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Group M ass of Indiv idual

Castings

]1 1

Up to 12'5

kg

21 )

Over

12'5

kg and

up to 50 kg

3'1

Over 50 kg and up to

500 kg

41 )

Over 500 kg

and lip

to 1 tODDe

5 Over 1 tonne

IS 210 : 1993

II PROVISION OF TEST BARS

11.1 A ll test bars shall be cast s~parately in sand

moulds and the nun,bfr of tcst bars required shall

bc as specified in 11. Tbey shall be ca,,( at the

same timc ar.d fn m the s'Im r. melt as

th ca'tings

t he v r ep re se nt .

11.2 The test bar material ,ball be iejpntifiable

,ith that of the castings represf'nted.

11.3 \Vhen castings are subjected to he'll treat-

ment, the test bars shall be heat-treated together

w ith the ca5tings they represent.

11.4 The test bars shall be cast in dr ied, baked or

chem ically bonded moulds made mainly or al)

agg. egate of siliceous sand with appropriate

binders. the average grain size of the sand shall

be approximate to that of the sand in which the

castings are pour~d. Moulds for the test bars shall

be approximat ely at room temperature when

poured. More than one test bar may be cast in a

single mould. but each bar in the mould shall be

surrounded by a thickness of sand which is not

less than the diameter of the bar.

12 FREQUENCY OF TESTING

12.1 The number of tests required for each melt

or batch of castings shall be as laid down in

Table I, various classes of castings being divided

into five representative groups according to mass.

12.2 In the case of large tonnage or castings

being produced can tinuously, the minimum

number of test bars to be provided shal1 be one

tensile test representing every two bours produc-

tion from a melting furnace.

Table 1 Number

of

Tests

( C lau se

12.1 )

Test Requirements

One te,t for each 500 kg

of castings or part thereof

One test for every 1 t onne


One test for every 2 tonnes



o f castings o r p2 .rt there of



or one test fOf every

casting w eighing 4 tonnes

or m ore

llln addition Groups 1,2, 3 , and 4 all castings repre-

sented by one test shall be pour.-d from the same ladle

or same heat as the bar or bars provided for the test.

13 SIZE OF TEST BARS

A test bar from which the tensile test piece is

machin~d shall be cast as a uniform cylindrical

bar of 30 mm diameter. The tolerance on the

diamctn shal1 be g mm. The mmnnum lcngth

of the test bar sha l be 230 mm.

14 TENSILE TEST

The tensile test shall be carried out in

;)

ccorda:lce

w ith IS 2078 : 1979, using a test piece conform ing

to the dimensions in Fig.

1

and Tab1c 2. The test

piece shall be accurately machined, with a good

surface finish. The transition between the ends

and the paraJlel length shall be smooth, w ithout

undercutting or a sudden step down in diameter.

NOTE - Self-aligning grips are recommendn: to

e ns ur e a xi al l oa di ng .

15 TENSILE STRENGTH

vVhen tested in accordance with the requirement

of 13, the test piece shall comply with the mini-

mum requirements specified in Table 3. The

tensile strength specified is that obtained from test

bars cast separatel y from the castings to which

they refer. The test values represent, therefore,

only the quality of the metal from which the

casting have been poured.

16 HARDNESS TEST

16.1 The Brinell hardness test shall be carried

out in accordance with the method given in

IS 1500 : 1983. Brinell hardness values for diffe-

rent grades or grey iron castings shalJ be as

specified in Table 3.

16.1.1 The hardness test shall be conducted at

specific point on the castings. These specific points

shall be such that they are amenable for hardness

checking in routine procedure.

16.1.2 The location of the specific point on a

casting for hardness measurement shall be as

agreed to between the purchaser and the manu-

facturer.

17 TRANSVERSE TEST

If required, the transverse test may be carried out

by the manufacturer in accordance w ith the

method given in Annex E. The m inimum tcst

requiremrnts shall be agr-:ed upon at the time of

enquiry and order.

18 HYDROSTATIC TEST

If specified at the time of enquiry ancl order the

castings may be tested for the hydrostatic test

pressure. The requirements for the test pressure

shall be mutually agreed to between the purch~sel'

a nd th e m an ufa ctu re r.

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Grade

Tensile

Brinell

IS 4843 : 1968

)

Strength

Hardness

Min

MPa

(

Nlmm'

)

HB

(1)

(2 )

(3)

FG 150

150

130 to 180 .

FG 200

ZO O

160 to 220

FG 220

no

130 to 220

FG 2GO

26 0

180 co 230

FG 300

30 0

180 to 230

FG 350

350

207 to 211

FG 100

400

207 to 270

IS 210 : 1993

Table

2 Dimensions

of Machined Tensile Test Piece

(

Clause

1

'1

)

Gauge

Dameter

D

Minim.um

Radius

Machining

Tolerar cc

for th e

Gauge

Djamet~r

Minimum

Parallel

Length

(I)

Lc

(3 )

R

(4 )

2)

mm m m

mm

mm

Plain Ends

r ,

N1inimum Minirnum

Diameter Lengtb

Screwed Ends

r---

,

M jnimum ~M jnimurn

D,a at Lengtb

Root

d, Ls

(7) (3)

d,

(5 )

L1 '

(6 )

mm

mm

mm

25

mm

20 + O 'S 55 25 23

NbTE --,\lith

screwed-ends, any form of thread may be used

thread is not less th an that spe cified.

65

30

provided that the diameter at the ~oot of the

Table 3 M echanical

Test Requirements

Clauses IS '1nd 16.1 )

NOTE

-

Altbough m echanical properties are 'peci-

tied for Grade FG

1:'0 tbe material shaIJ be only

(est€d if required by the purchaser.

I

19

RETESTS

19.1 If on being

obvious signs of a

the test may be

made.

]

9.2 If any sound test piece fails, two further

tests shall be made, should either of these test

pieces fail, the castings represented shall not

comply with the requirements of this Indian

Standard.

tested any test piece shows

casting defect, the results of

discarded and a further test

19.3 In the absence of further separately cast test

bars, the manufacturer shall have the option of

subm itting test bars, sectioned from an agreed

position in the castings The requirements of the

test shall be as agreed to between the purchaser

and the manufacturer. However, the guidance

may be obtained from Annex A .

2 0 IN SP EC TIO N

By agreement with the manufacturer, the pur-

chaser or his representative shall have across at

all reasonablt times to those parts of the manu-

facturer's works engaged on his order, he shall

be at liberty to inspect the manufacturer at any

stage, to witness the required tests and to reject

any material that does not comply w ith this

standard. When the castings are to be inspected

during manufacture and tested in the presence of

the purchaser's representative, this shall be slat cd

on the enquiry and order.

21 TESTING FACILITIES

21.1 The manufacturer in supplying the test

samples as required for testing shall prepare from

them the necessary test pieces and supply the

labour and appliances for making all tests on his

prem ises in accordance with this standard.

21.1.1 Failing facilities for carrying out the

prescribed tests at his own works the manufac-

turer sha)] carry out the tests elsewhere.

22 M ARK IN G

22.1 Each casting, if feasible, shall be legibly

marked with a number of identification mar ks

which it (an be traced t ~ the melt, and the balch

of heat treatment, if done, from which it was

made.

22.2 By agreement between the purchaser and the

manufacturer, castings complying w ith the re-

quirements of this standard shall be, after im -

pection, legibly marked with an acceptance

mark

23 STANDARD MARK

The castings may also be marked with the

Standard M ark.

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IS 210 :11993

ANNEX A

( Foreword

an d

Clause

1 9.3 )

APPROXIMATE VARIATION OF STRENGTH

A-I The Indian Standard grades of grey cast iron

are based on the minimum tensile strength ob-

:ained when metal is cast into test bars of 30 mm

diameter. The strength developed by a given

metal shal1 vary w ith the coohngrate in the mould

higher strengths being obtained if the same metal

is cast into smaller bars than 30 mm diameter

and lower strengths if the metal is cast into bars

larger than 30 mm diameter. Sim ilarly, the cool-

ing rate of a flat plate is slower than that of a bar

whose diameter is equal to the thickness of the

plate so that the strength developed in the plate

'I'ill be lower than that developed in the bar.

A -I.I The cooling rate of a casting in a mould

( hence the strength developed in any particular

section thickness by the metal employed for its

manufacture) is influenced also by the presence

of cores, changes in section thickness, the presence

of bosses projections and inters<>ctions, such as the

junctions of ribs and bosses. Thus, in castings of

other than simple shape and uniform thickness

tht> cooJing rate of any part can be expected to

differ from that of a flat plate of sim ilar section

thickness.

E

E

30 0

z

o

a. .

:z :250

I

I-

~

~ 20 0

Ci :

,-

{)

~ 15 0

UJ

z

lJJ

>-

A-2 Figure 2 gives a guide to the likely variation

in tensile strength in different sections when a

given grade 01 grey iron is cast into a casting of

simple shape and uniform thickness or containing

cored holes where the cooJing rate in the mould

of a given section shall differ from that in a casting

of sample shape and uniform thickness, the dia-

gram provides only an approximate guide to the

likely tensile strength in different sections and

design should be based on the measured tensile

strength in critical parts of the casting.

A -2.1 Table 4 gives guidance to the likely varia-

tion in tensile strength f(,r diffuent casting section

thicknesses when a given grade of grey cast iron

is cast into a casting of simple shape' and uni-

form thickness. For casting of non-uniform

section or castings containing cored holes, the

table provides only an approximate guide to

the likely tensile strength in dtfferent sections,

and casting design should be based on the

measured tensile strength in critical parts of the

casting.

35 0

CRO SS-SECTIONA L THICKN ESS, m m

15 25 50-75 100 125

---+---~ +--

iOO

o

15 0

35 0

30 0

25 0

20 0

15 0

10 0

This diagram is for guidance and should not be used for acceptance purposes.

FIG. 2 V ARIATlON OF TENSILE STRENGTH W ITH CROss-SEcnONAL THICKNESS OF GREY I[W ~ CASTlNGS

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Grade C astin g S ection T hick ne ss,

A nticipated T ensile

mm Strength

,--_

__ __ ..A .____________

MPa

(NimmO)

Over

Up to and

Including

FG 150

2'5

10

15~}

10

20

13 0

20

30 115

30

50

10 5

FG 200

25 10

20 5

10

20 180

20 30

16 0

30

50

14 5

FG 260

+'0

10

26 0

10

20

23 5

20

30

21 5

30

50

19 5

FG 300

10

20 270

20

30

2+ 5

30

50 225

loG 3 50

10

20

31 5

20

30

29 0

30

50 270

FG 350

350-

35

FG 300

30 0

30

FG 260

25 0

25

FG 220

FG 200

--200

-2 0

FGI50 ---

150~-

----15

MPa

(=Nfmm2)

IS 210 : 1993

Ta~le 4 Anticipated Tensile Properties for the Castings ( for Information Only)

( C la us e A-2. )

ANNEX B

( Fo reword )

M Pa

GRADE

(=N/mm2)

FG

1.00

---~---

1.00--

kgf/rnm2

--1.0

GRADE

1.0

35

30

25

20

15

CONVERSION F A C T O R

1N /mm2

=

1M Pa =0'1020 kg Imm2

Fr'~ . 3 COMPAnlsoN BETW EEN GHADRS IN THIS EDITION AND THE PREVIOUS EDITION

BASED ON M INIMUM TENSILE STRENGTH

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Unit

Grade

.-- -------.---------- - -----~------~-----.....

1'G 15 0

1'0 200

1'0 220

FG 2GO

FG 300

FG 350

PG 400

MPa

( Njm m2 )

15 0

20 0

22 0

26 0

30 0

35 0

40 0

MPa

(

Nlmm2

)

4-2

56

62

73

84

98

1]2

MPa

(

Njmm'

98 130

14 3

16 9

19 5

22 8

26 0

Percent 0'60-0'751)

0 '48_0 '671) 0'39-0 631) 0 57 0'50

05 0

0'50

Percent

0'15

0'17

0 18

0 20

0'22

0-25

0'28

0'45-0'601) 0 '31_0'501 ) 0 '21 -0 '451 ) 0'37 0'28

0 '25 0 '28

MPa

( Nfmm2)

]2 0

16 0

17G

208

2.;0

28 0

32 0

MPa

( ~/mm2

)

GO O

no

76 8

86 4

960 I 080 I 200

MPa

(

Nfmm2

)

84 -

11 2 12 3 14 6 16 8 196 224

MPa

( N fm m2

)

19 5

26 0

28 6

33 8

39 0

45 5

52 0

MPa

( N (m m ')

17 3

23 0

25 3

29 9

:H 5

40 3

4G O

MPa

( N/mm2

)

17 3

23 0

25 3

29')

34 5

40 3

46 0

Percent

>4

>4

>4

>4

Up to 4

Up to 4

Up to 4-

OP a

10 0

11 4

12 0

12 8

13 5

140 145

GP a

10 0

1\4

12 0

12 8

13 5

14 0

14 5

GPa

40

46

48

51

54

56

58

+ - _ _ ~ _ _ _ _ _ _ _ _

0 26-~----------_;_---->-

:V [P a (

Njmm'

)

6

90

99

1\7

13 5

14 9

15 2

0

~ [P a (

N/mm '

)

G

(~

87

94 -

10 3

In

129 127

IS 210

;

19~3

ANNEX C

( Foreword)

TYPICAL PROPERTIES OF GREY CAST I RON

C-l The foHowing informatiot1 is gi\'ct1 for thc guidat1cc of engin~ers and d~signcrs It does not form

pi'n of the standard and should not be U5~d for a~c p,ance pClrpo,~s:

P~'ope . .' ti c s

'~ .: .n s il c s fr ~n g th

O'U

I percent proof

stre~s

\I

percent proof

5tress

l'otal strain at

failure

~:::Iastic straJn at

failure

T ota l m in us e la stic

strain a t fa ilure

'

0tchc d ten s:le stre-

ngth (

see Note 2

)

'Circumferential

1-5Qitnotc b) root

radius 0'25 m m Or

Notch depth 2'5

mm . notch dia 20

m m .

or notch

depth 3'3

mm ,

notch diam eter

7 '/ ) 1 11 1n

)

C;rcurnfcreutiaJ

notch, Radius 9 '5

rom

( Notch depth

2-5 m rn, notch dia-

rneter 20 m n1

)

C om p re ss iv e s tr en gt h

n'l

percent proof

stress

0'1

percent proof

stress

S he ar s tre ng th

To r,iu nal strc ng th

Shea strain at

failure

M odulus of elasticity

Ten:;ion

Compression

M odlllJs of rigidity

Po isso n's ratio

Fatigue lim it

(

'Vah-

ler

)

~ innotchecl (8'4

mm dia)

V~notchcd (Cir.

qlm fercntial -i-50

V-notch \\lith

0.25 III D1 root

r ad iu s) D ia me te r

at notch g-4 m In

depth of notch

3',. mm)

J-J:,rdnc$S

l\1Pa

(

</mm'

)

15 0

20 0

22 0

:100

35 0

40 0

60

R efcr Table 3 for harclneos , a lu,'s

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x 10 -6/K

X 10-6:K

X

10-61K

- -.---------

----~----1O-0 - --------+

1 0 0

)

-<-________________.____ll-O________~

1 1 0

)

S

., . _________________12-5_________-+

1 2'5 ) N ote 3 )

5 2 S

5 0 8

5 0 l

+ 8 8

+ 7 4

j . S 7

H , \ )

5 1 5

49'8

49-1

+7'8

+6'4

++'7

.,3'0

50':'

48'8

18'1

46'g

45'4'

'13'7

12'0

'19'5

47'8

i7' I

4:,'8

44'4

+2,7

41'0

48'5

i6'8

'16']

H '8

43'4

+ 1 '7

40'0

26 5

375

, 2 0

46 0

46 0 46 0

46 0

35 5

43 5

455 495 495 495

49 5

40 0

46 5

' 6 5

505 505

;,05

505

42 5

480 475

515

51 5

515 515

44-5

50 0

495 535

53 5

53 5

,,3:,

1-90

55.r>

56 0

G05 605

GaS

GOS

7'05

7'10

7 1 5

7'20

7'25

7'30

7'30

P. ope1..tl( s

C o(-fficic nt o r ther~

m a J e xp re ss io n

- 109°e

to Looe

,6°c [ 0 2 0D oe

200e to 100°C

Therma l conduct iv it y

100°C

LOOoe

300°C

oooe

5000e

S pe cific h ea t c ap ac ity

20° C to 200°C

20'e to 300'e

200e to 400°C

200e to 5000e

Looe

to 6 00 0e

200e to 7000e

-Re la ti ve d en si ty

\r fa gn et ic a nd e le c-

tric::..lprouerties

M aximum magne-

t ic p e rm e ab il it y

R~mflnent

magne~

usn\.

Coercive force

Hysceresis loss at

50 Hz

Elec tr ica l r c si st iv jt y

NOTES

Unit

\VImI'.

W/mK

W/mK

WlmK

\\ jmK

J/kgK

JlkgK

J/kgK

JjkgK

J/kgK

J 'k gK

i-LHlm

T

Aim

Jim'

Wlkg

i-LSlm

IS 210

: 1993

r de

c ~ ' ~-----.....

FC ; 150 FG 200 FG 220 FG 260 FG 300 FG 3')0 FG ~11~

301 to 380 ~-'-

-< 0'4 to 0'5 '0-

-<

560 to 720 ,. -+

-< 2500 to 3 000 +

-< 17'6 to 20 '9 +

0'800 0770 O '7CO 0'730 0'700 (\'070 O '64 1

1 The typical properties given in this Annrx are the properties in a 30 mm diam eter separately cast test bar or

in a casting section correctl)' represent,d by this size of test bar, W hffe the tensile strength does not correspond

to that givrn, other propeflics m ay differ slightly from those given,

2 Notched tensile strengths increase slightly as notch s verity ratio, notch rzdius, notch diameter, increa..3e

above 0 4 7 ,

3 T h e v a l u e s quoted for coefiicient of therm al expansion of G rade FG 400 are for m aterial in pearJitic iron,

W here acclcuJar iron is used for this grade appropriate values are;

20 e to LOQoe

s'() X I O - G j K

20°C to 400°C 16'5 X 10-6/K

J)

Values depend on the composition of iron,

ANNEX D

(

Foreword)

D-l BASIS FOR ORDER

INFORMATION TO BE SUPPLIED BY THE PURCHASER

h) Any required lim its on the sulphur and

phosphorus content

D-LI

\Vhile placing an order for the purchase

of grey iron casting covered by this standard, the

;Jurchascr should specify the follow ing:

a) M a t e r ia l specification;

c) Drawing or reference number of the

pattern (if supplied by the purchaser

along with a copy of the drawing;

8/10/2019 IS 210.pdf


IS 210 : 1993

d) Tests required;

e) Whether the castings are to be inspected

and tested in the presence of the pu rch a-

se r' s repre sen ta ti ve ;

f) C ondition of delivery;

g) Any special requirement of the purchaser,

for example, hardness tests and locations

of non-destrur.tive testing, quality assu.

rance, etc; and

h) Test reports, if required.

ANNEX E

( Clause 17 )

TRANSVERSE TEST FOR GREY CAST IRON

E-l OBJECT OF THE TEST

The object of this test is to determ ine the trans-

verse bending strength of grey cast iron by apply-

ing constantly increasing single load at the centre

of a test bar arranged as a beam between two

supports until fracture occurs.

E-2 TEST BARS

E-2.1 The cast tcst bars shal1 have the dimensions

given in Table 5.

Table 5 D im .ensions of Transverse

Test Bars

( C la us es E-2.l an d E-2.2

)

Diameter

of the qast

Test Bar

Perm issible Variation Length (L)

from N om inal Min

Diameter

, A 't

Uomacbioed Machined

(1 )

(2 )

(3 )

(4 )

rom

mm mmm

30

500

-

['2

:i 0 '2

E-2.2 Test bar is normally tested unmachined.

The surface of the test bar shall be free from un-

evenness and seams which may be removed by

careful grinding. The diameter shall be measured

at the centre of the test bar in two directions per-

pendicular to one-another. The difference between

two measurements shall not exceed 5 percent of

the norma diameter. The mean value of the two

diam eters shall be the diam eter d o s e e E-1) of

the test bar. For its perm issible variations from

the nominal diameter and the accuracy of

measurem ent of the diameter, the values indicated

in Tables 5 and 6 shall apply.

E -3 P RO CE DU RE

E-3. I Place the two ends of the test bar on hori-

zontal supports. The support and the point of

application of the load shall be rounded to a

radius of 5 to 20 mm. Apply a single load verti-

cally at the centre of the bar ( se e Fig. 4 ).

E-3.2 Increase the load uniform ly without shock

until the bar fracture. The load should be applied

in such a way that the increase of stress does not

exceed 3 MPa per second Find out the load at

the fracture of the test bar w ith the accuracy

indicated in Table 6.

E-3.3 Determ ine the deflection of the test bar

from the motion of the thrust relative to the fixed

supports or to the supporting table of the machine.

In order to elim inate any errors in measuring the

deflection, the measurement should .be started

after applying a small preload as given in

Table 6.

Table 6 Testing Conditions and

Accuracy

of R eadings

C l a u s e s

E-2 .2 , E -3 .2 , E -3 .3 and

Fig.

I}

)

Nom inal D istance

Diam eter Betw een

d Centre of

Supports,

LB

Accuracy of Readings Pre-

r-

__, A ,~

Load

Diam e- Load

P,

D fflec- A ppro

ter of Max tioo at

Bar Frac-

d ture

(3) (4) (5) (6)1) (2)

m m

mm mm mm

m m

om

30

45 0

0.2

200 to

40 0

10 0

L O A D P O S I T I O N

Fi

-. >-

9

--- -

I Ls--T

I

-

u_

,--~--

-- , ~ 1

,L

_~~

,'

u _L..~ ~

FIG. 4 TRANSVERSE TEST BAR OF GREY CAST IRON

8/10/2019 IS 210.pdf


E-4 TEST RESULT

The test report shall include:

a) load at fracture in C\;

b) bending strength

fb'

to an accuracy of O'::J

MPa calculated from the formula:

IS 210 : 1993

where

P

=

maximum load at fracLUre in N ,

1.8

distance between centres of supports

in mm, and

do

=

mean diameter in mm, and

c) deflection at fr2.cture in mm.

8/10/2019 IS 210.pdf


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