IS 6912 (2005): Copper and copper alloy forging stock and ...allaboutmetallurgy.com/wp/wp-content/uploads/2016/10/is.6912.2005.pdfDisclosure to Promote the Right To Information Whereas

Page 1

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 6912 (2005): Copper and copper alloy forging stock andforgings [MTD 8: Copper and Copper Alloys]

Page 2

Page 3

Page 4

IS 6912 : 2005

~ J1lrtq;

"ffiifT~ "ffiifT ~~ ~~~~

~­( i'8J</ ~8fUT )

Indian Standard

COPPER AND COPPER ALLOYS FORGINGSTOCK AND FORGING - SPECIFICATION

(Second Revision)

res 77.120.30

C BIS2005

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

September 2005 Price Group 3

Page 5

Copper and Copper Alloys Sectional Committee, MTD 8

FOREWORD

Th is Indian Standard (Second Revision) was adopted by the Bureau of Indian Standards, after the draft finalizedby the Copper and Copper Alloys Sectional Committee had been approved by the Metallurgical EngineeringDivision Council.

This standard was first published in 1973. In the first revision in 1988 forging stock was also included andaccordingly title of the standard has been changed. In this revision, following modifications have been made:

a) A new grade leaded manganese brass --:-FMnB has been included, for the manufacture of L.P.G valves.

b) Additional grades FHTB3, FHTB4 and FHDBS are included for automobile industries.

c) Chemical composition and mechanical properties of certain alloys have been modified.

d) Dimensional tolerances to forging stock has been specified.

For the purpose of deciding whether a particular requirement of this standard is complied with the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance withIS 2 : 1960 'Rules for rounding off numerical values (revised)'. The number of significant places retained inthe rounded off value should be the same as that of the specified value in this standard.

Page 6

IS 6912 : 2005

Indian Standard

COPPER AND COPPER ALLOYS FORGINGSTOCK AND FORGING - SPECIFICATION

(Second Revision)

3 TERMINOLOGY

t SCOPE

For the purpose of this standard the followingdefinitions as given in IS 3288 (Part 1) shall apply.

3. t Foriing Stock - Extruded rolled, drawn or cast

This standard specifies requirements for chemicalcomposition, mechanical properties and othercharacteristics for wrought or cast copper and alloyforging stock and for forgings of these materials.

2 REFERENCES

The forging stock and forging shall be sound and freefrom laps, cracks or other harmful defects.

7 DIMENSIONS AND TOLERANCES

5.1 Wrought forging stock may be supplied in one ofthe following conditions as specified by the purchaser:

'a) Hot worked, and

b) Cold worked.

5.2 Unless otherwise specified by the purchaser,forging produced in all materials shall be supplied inthe as manufactured (M) condition.

6 FREEDOM FROM DEFECTS

General requirements relating to the supply ofmaterialshall conform to IS 1387.

5 CONDITION OF DELIVERY

material intended for the production offorgings usuallyin the form of rodlbarlhollow rods and sections.

3.2 Forging - A shape produced by hammering orpressing, when hot, between open or closed dies. Theterm forging includes the process of forging, dropforging, hot stamping and hot pressing.

4 SUPPLY OF MATERIAL

7.1 The tolerance on sizes of bars/rods of copperand brass shall be as per IS 2826 unless otherwisespecified and agreed to between the purchaser andthe manufacturer.

7.1.1 The tolerance on sizes of bars and rods of.aluminium bronzes shall be as per Table 1 unlessotherwise specified and agreed to between thepurchasers and the manufacturer.

7.1.2 The tolerance for the hollow rods and sectionsof copper, brasses and bronzes shall be agreed tobetween the purchaser and the manufacturer and shallbe stated in the order.

7.1 Forgings

The forgings shall be made to dimensions specifiedon the drawing which forms a part of each contract ororder subject to the tolerances agreed to between thepurchaser and the manufacturer. The forgings shallbe capable of being machined to the finisheddimensions, if this requirement is set out in the drawingor order.

Title

Methods of chemical analysis ofcopper (revised)

General requirements for thesupply ofmetallurgical materials(second revision)

Mechanical testing of metals ­Tensile testing (second revision)

Method ofmercurous nitrate testfor copper and copper alloys(first revision)

Dimensions and tolerances forcopper and copper alloy, rodsand bars for generalengineering purposes (thirdrevision)

Methods of chemical analysis ofcopper-nickel zinc alloys

Glossary of terms relating tocopper and copper alloys:Part I Materials (third revision)

Methods of chemical analysis ofbrasses

Methods ofchemical analysis ofbronzes

4027 : 1967

3685 : 1966

1608 : 1995

3288 (Part 1) :1986

1387 : 1993

2826 : 1986

2305 : 1988

3187 : 1965

The following standards contain provisions whichthrough reference in this text, constitute provisions ofthis standard. At the time of publication, the editionsindicated were valid. All standards are subject torevision and parties to agreements based on thisstandard are encouraged to investigate the possibilityof applying the most recent editions of the standardsindicated below:

IS No.

440 : 1964

Page 7

IS 6912 : 2005

8 CHEMICAL COMPOSITION 12 SAMPLING

12.1 Material shall be grouped in batches as follows.One sample each for chemical analysisand mechanicaltest shall be selected from each batch or remainingpart of a batch to provide the necessary test pieces.The test pieces shall be prepared as per 13.

12.1.1 For Forging Stock

Specified Size(Diameter or Width

Across Flats) ofMaterialAr-------" ------......~

Over Up to andIncluding

kg

(3)

250

500

1000

2000

kg

(3)

2S0SOO

1 0002000

Mass ofBalch

Mass ofBatch

(2)

124080

mm

(I)

6124080

0.5

2

10

mm

12.1.2 For Forgings

Mass ofIndividualForgings in Batch

r --A '\Over Up to and

Including

kg kg

(1) (2)

0.5

2

10

The tensile test shall be carried out in accordance withIS 1608. The test piece shall be machined from testsamples selected in accordance with 12. The tensileproperties of the forging stock and forgings shallcomply with the appropriate requirements given inTables 2 to 4.

11 MERCUROUS NITRATE TEST (FORFORGINGS)

When required by the purchaser, forgings made out ofbrasses and bronzes may be subjected to mercurousnitrate test as per IS 2305. One forging per batch offorgingIn accordance 12.1.2shouldbe testedforabovetest.

10 FORGEABILITY TEST

9 MECHANICAL PROPERTIES

8.1 The chemical composition of the forging stockand forgings shall be as given for the appropriatematerial in Tables 2 to 4.

8.2 The chemical composition shall be determinedeither by the method specified in IS 440, IS 3685,IS 4027 and IS 3187 for copper, brasses, bronzes andcopper-nickel zinc alloys respectively or any otherestablished instrumental/chemical method. In case ofdispute the procedure specified in IS 440, IS 4027 andIS 3187 shall be the referee method.

10.1 The forge ability test shall be applicable to theforging stock.

10.1.1 A longitudinal test piece having a length equal.- to the diameter or width across flat of rods, bars and

sections selected in accordance with 12 when graduallyheated to red hot placed on end and compressed to20 percent of its original length shall not show anysign of fracture or cracks on the free surface.

Table 1 Dimensional Tolerance for Bronze Rods

(Clause 7.1.1)

SiuA

"rOver Up to and

Including

mm mm

(2) (3)

6 10

10 20

20 30

mm mm mm

(4) (5) (6)

±O.lO -O.IS *0.12

*O.IS -O.2S :t:O.20

*0.20 -0.35 :t:O.25

:i:O.30 -0.40 *0.35

:t:O.60 -0.75 :t:O.6S

:i:1.0% -1.5% :i:1.2S 0/0

2

SINo.

(I)

i)

ii)

iii)

iv)

v)

vi)

30

SO

80 and above

SO

80

RoundRods HexazonalRods Square Rods

Page 8

NOTE· - When the size of the order does not pennit ofbatchingin abovequantities. the frequency of testingshall beasagreedto betweenthe purchaser and thesupplier.

13 PREPARATION OF TEST SAMPLES

13.1 Forging Stock

13.1.1 Test pieces selected in accordance with 11.1shall be prepared as follows.

13.1.2 Hot Worked Material

Test pieces shall be taken directly from the materialor hot forged to cross-section approximately two­third of the original cross-section before testing.

13.1.3 Cold Worked Material

Test piece shall either be annealed at a temperaturenot less than 500°C for 30 min or be hot forged tocross-section two-third of the original cross-sectionbefore testing.

13.1.4 Cast Material

Test piece shall either be annealed at a temperaturenot less than 500°C for 30 min or be hot forged tocross-section two-third of the original cross-sectionbefore testing.

13.1.5 For test samples of diameter or width acrossflats greater than 28 mm, the longitudinal axis of thetest piece shall be 14mm from the outside of the testmaterial.

13.2 Forgings

13.2.1 Tensile test shall be done either on a testsamples of the forging stock from which the forgingshave been made or on the actual finished forgings, ifthese are of sufficient size. In practice, the tensiletest is normally carried out on the forging stock fromwhich the forgings are manufactured.

3

IS 6911 : 2005

14 RE-TEST

14.J If any of the test pieces first selected fail in anyof the-prescribed test, two further samples from thesame batch be selected for testing one of which shallbe from the forging stock or forging from whichthe original test sample was taken. Unless theforging stock or forging has been withdrawn by thesuppliers.

14.1.1 If the test pieces from both these additionalsamples pass, the batch represented by the test samplesshall be deemed to comply with this standard. In casethe test piece from either of these additional samplesfail, the batch represented by the test samples shall bedeemed not to comply with this standard.

15 MARKING

15.1 Unless otherwise agreed to between the purchaserand the supplier, each forging shall be clearly markedwith the manufacturer's name or trade-mark andidentification mark, if any.

15.2 HIS Certification Marking

IS.2.1 The material may be marked with the StandardMark.

15.2.2 The use of Standard Mark is governed by theprovision ofthe Bureau ofIndian Standards Act, 1986and the Rules and Regulations made thereunder. Thedetails of the conditions under which the licence forthe use of the Standard Mark may be granted tomanufacturers or producers may be obtained from theBureau of Indian Standards.

16 TEST CERTIFICATE

The supplier shall provide test certificate for eachconsignment giving infonnation like batch number,chemical composition and mechanical test results.

Page 9

Tab

le2

Che

mic

alC

ompo

sitio

nan

dM

echa

nica

lP

rope

rtie

so

fCop

per

.. f'Ij

(Cla

uses

8.1

an

d9)

CI\

\0 .. N ..SI

Mat

eria

lD

aig

-C

hem

ical

Com

posi

tionC

onst

ituen

t,Pe

rceD

tM

etla

aaie

alP

rope

rtie

sN

No.

uti

.fo

rFo

raiD

iSt

ock

8••

dF

o...

...

til

~A

r--

~r

~

Cu

SnP

bFe

Ni

As

SbP

SeT

eH

iTo

tal

Ten

sile

0.2

Perc

ent

Imp.

Stre

ngth

Perc

ent

E1o

np-

MP

aPr

oof

lio

n.

Stre

ssG

auae

MPa

Len

gth

5.6S~

Mill

Max

MIa

Mia

Mill

II",

Min

(I)

(2)

(3)

(4)

(S)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

(14)

(IS

)(1

6)(1

7)(1

8)

i)EI

cctro

Iy-

E1?

99.9

0-

0.00

5-

--

--

--

0.00

10

0.03

210

-40

ticto

ugh

(inc

ludi

ng(e

xclu

dinl

pitc

hsi

lver

)°2an

dA

g)co

pper

~

ii)F

irere

fi-

FR

HC

99.9

0-

0.00

5-

--

--

--

0.00

2S

0.04

210

-40

ned

high

(incl

udin

g(e

xclu

clin

lco

nduc

tiv-

silv

er)

°2and

Ag)

ityco

pper

iii)

Phos

phor

usD

PA99

.20

0.1

0.01

00.

030

O.lS

0.20

-0.

10.

02-

-0.

020

0.00

300.

0621

S-

3Sde

oxid

ized

(inc

ludi

ngM

axM

axM

ax0.

50M

ax0.

10M

ax(e

xclu

ding

arse

nica

lsi

lver

)A

g,A

s,N

ico

pper

and

Pc)

NO

TE

-U

nles

soth

erw

ises

tate

d,fi

gure

sin

the

tota

lim

puri

tiesc

olum

ninc

lude

thos

etha

tare

spec

ifie

dasm

axim

um.

The

min

imum

elec

tric

alco

nduc

tivity

forf

orgi

ngst

ock.

dfo

rgin

gsm

ade

out

ofE

TP,

FRH

Csh

ould

be97

perc

entl

AC

S.

Page 10

Tab

le3

Che

mic

alC

ompo

siti

onan

dM

echa

nica

lP

rope

rtie

sof

Bra

sses

(Cla

uses

8.1

an

d9)

saM

ater

ial

Des

ilaal

ioa

Cb

e.ic

alC

Om

posi

tioD

CO

IIst

imeD

I,Pe

rceD

tM

echa

.ica

lP

rope

rtie

sNo

.lo

rF

orgi

llJ

Sto

ck

_--------------~

••d

F:t

..ap

r-

~r

------

............,

Cu

JIbSo

FeA

IM

nN

iSi

Cr

Co

Zn

Tot

alT

ensi

le0.

2Pe

rcen

tH

ard-

Izod

Imp.

Stre

ngth

Perc

ent

Ela

nga-

ness

onPe

rcen

tM

Pa

Proo

flio

nat

HR

BkB

flSt

ress

Gau

gem

MPa

Leng

thS.

65JS

;,

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

(14)

Max

(IS

)

Mm

(16)

Mm

(17)

Mm

(18)

M",

MIn

(19)

(20)

NO

TE-

All

sing

lelim

itsar

emax

imum

unle

ssot

herw

ise

stat

ed.

u.

i)L

eade

dFL

BB

rm

ii)L

eade

dF

MnB

MnB

rass

iii)

Nav

"FN

BB

ras

iv)

H.T

.Brm

FHrB

I(S

olde

ring

Qua

lity

)

v)H

.T.B

rmFH

rB2

II

vi)

H.T

.Bra

ssFH

rB3

m

vii)

H.T

.Bns

sFH

TB

4IV

viii)

H.T

.8rI

ssFH

rB5

V

ix)

Nic

kel

FNS

Silv

er

56.5

60.0

56.S

60 61.0

64.0

56.0

60.0

56.0

61.0

56.S

60.0

60.0

63.0

59.0

62.0

44.0

41.0

.

0.6­

2.0

1.0

1.5

0.20 0.5

1.5

0.5

1.5

0.2

0.8

0.15

0.10

1.0­

2.S

1.0

1.S

0.6

1.1

0.2

0.8

0.3

0.15

0.10

0.30 0.3

0.10

0.3

1.25

0.3

1.25

0.2

1.0

0.50

0.30

­1.

00

0.30

0.2

0.3

2.0

1.4

2.0

2.5­

3.S

3.S0

4.50

0.5­

1.20

0.5­

2.0

0.5­ 2.0

1.6-

1.0

0.5-

2.2

02

01.

0

2.S-

02

-0.

75-

3.5

0.5

12

5

0.15

2.0-

0.7S

-3.

01.

25

0.20

9.0-

0.30

11.0

0.1­

0.3

Bal

0.75

310

(ae

lFe

)

Rem

aind

er0.

7539

5(e

xel

Fe)

BaI

0.50

340

(exe

lFe

+Pb

)

Bal

0.50

430

BaI

0.50

460

BaI

0.50

600

(exc

lN

icke

l)

BaJ

0.75

57S

0.50

BaI

0.75

635

1.50

8aJ

0.50

460

(exe

lFe

)

180

180

32S

300

400

25 20 15 IS 12 10 10 2 8

220

220

8S 8S 95... CI

J0

\'0 ... W w 8 ti

t

Page 11

Tab

le4

Che

mic

alC

ompo

siti

onan

dM

echa

nica

lP

rope

rtie

sof

Bro

nzes

.. fI}

(Cla

uses

8.1

an

d9)

~ '0 .. N

saM

ater

ial

Da

ig-

Che

mic

alC

ompo

siti

onC

onst

itue

at,P

erct

Dt

Muh

aaic

alP

rope

rtie

sN

No.

..do

nfo

rFO

l'liD

ISt

ock

8an

dF

ora

illl

le

ll

~A

r-

~~

rC

uA

IFe

Ni

Mn

SnP

bZ

nSi

Mg

Tota

lTe

nsile

0.2

Perc

ent

Izod

Imp.

Slre

ngth

Perc

ent

Elo

nga-

kg/m

Perc

ent

Proo

flio

na

lSt

ress

Gau

geM

PaLe

ngth

5.6

5n

:M

Pa

Max

Max

Max

Max

Max

Mox

Max

M",

Mur

Min

Mill

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

(14)

(IS)

(16)

(17)

(18)

i)A

I.Si

FAD

Rem

aind

er6.

5-0.

300.

250.

100.

200.

050.

501.

5-0.

05O.

S48

517

530

4.0

Bro

nze

7.0

Max

2.0

(exc

lIro

n,0

\N

icke

land

Man

gane

se)

ii)7%

Al,

FA

Dt

Rem

aind

er6.

5-2-

3.5

0.50

0.50

0.10

0.05

0.40

0.15

0.05

0.50

, Max

460

190

305.

0B

ronz

e8.

0M

ax(e

xel

Man

gane

sean

dZ

inc)

iii)

~hAl,

FAB

2R

emai

nder

8.S-

4.00

/00.

500.

100.

050.

400.

100.

05O

.SO

,Max

520

21S

202.

7B

ronz

e10

(Fe+

Ni)

Max

(exc

lM

anga

nese

)

iv)

IOO/oAI~

FA

B3

Rem

aind

er8.

5-4-

6.0

4-6.

00.

500.

100.

050.

400.

100.

050.

50,M

ax63

031

012

2.2

Bro

nze

11M

oz(e

xcl

Man

gane

se)

Page 12

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to' promoteharmonious development of the activities of standardization, marking and quality certification of goods andattending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any fonnwithout the prior permission in writing of BIS. This does not preclude the free use, in the course of implementingthe standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating tocopyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments 'is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed.Jt is taken up for revision. Users of Indian StandardsshouJd ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of'SIS Catalogue' and 'Standards: Monthly Additions'.

This Indian Standard has been developed from Doc: No. MTD 8 (4599).

Amendments Issued Since Publication

Amend No. . Date of Issue

BUREAU OF INDIAN STANDARDS

Text Affected

{2337 8499,2337 85612337 8626, 2337 9120

{26038432609285

Headquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones: 23230131,2323 3375,2323 9402 website: www.bis.org.in

Regional Offices:

Central : Manak Bhavan, 9 Bahadur Shah Zafar MargNEW DELHI 110002

Eastern : 1/14 C.I.T. Scheme VII M, V.I.P. Road, KankurgachiKOLKATA 700054

Northern : sea 335-336, Sector 34-A, CHANDIGARH 160022

Telephones

{2323 76172323 3841

Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113

Western : Manakalaya, E9 MIDC, Marol, Andheri (East)MUMBAI 400093

{2254 1216,2254 14422254 2519, 2254 2315

{2832 9295, 2832 78582832 7891, 2832 7892

Branches : AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD.GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM.

Printed at Simco Prindnl Press, Delhi