IS 2023: Metallic chromium

9 Pages·1993·1.1 MB·English

by  Bureau of Indian Standards

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IS 2023 (1993): Metallic chromium [MTD 5: Ferro Alloys]
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1
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lndian Standard
CHROMIUM METAL-SPECIFICATION
( Second Revision )
UDC 669’26

Q BIS I993
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

June 1993 Price Group 1
syollaorreF lanoitceS ,eettimmoC DTM 0.5
DROWEROF
sihT naidnI dradnatS ( dnoces noisiver ) was adopted yb the uaeruB of naidnI ,sdradnatS after the
draft dezilanif yb the syollaorreF lanoitceS eettimmoC had neeb devorppa yb the lacigrullateM
gnireenignE nrcisiviD .licnuoC
sihT dradnats was tsrif deussi ni 1962 dna was yltneuqesbus desiver ni 1973. nI weiv of the
ecneirepxe deniag gnirud these sraey ti was tlef yrassecen ot esiver siht .dradnats ehT gniwollof
niam snoitacifidom evah neeb edam ni siht :noisiver
a) stimiL of muinimula dna nori tnetnoc for grade MCr97C05 has neeb desiver ot 0’50 Max
dna 0.35 tnecrep ylevitcepser dna the stimil of other seitirupmi Nz dna 02 neeb .dedulcni
)b elcitrap ezis egnar has neeb .deifidom
C) snoitamrofnI ot eb nevig elihw gniredro the lairetam evah neeb detaroprocni for the tifeneb
of the ,resahcrup dna
4 New sesualc evah neeb detaroprocni ot diova ediw noitagerges of the lacimehc ,stneutitsnoc
ybereht gnidraugefas the llams sremusnoc of siht .tcudorp
roF the esoprup of gnidiced whether a ralucitrap tnemeriuqer of siht dradnats si deilpmoc ,htiw the
lanif ,eulav devresbo or ,detaluclac gnisserpxe the tluser of a test or ,sisylana llahs eb dednuor off ni
ecnadrocca htiw SI 2 : 1960 seluR‘ for gnidnuor off laciremun seulav ( revised 1’. ehT rebmun of
tnacifingis secalp deniater ni the dednuor off eulav dluohs eb the emas as that of the deificeps eulav
ni siht .dradnats
IS 2023 : 1993
Indian Standard
MUIMORHC LATEM - NOITACIFICEPS
( Second Revision )
1 EPOCS ehT muimorhc latem tnetnoc of the stlem (or
parts of suounitnoc taps ) gnitutitsnoc the
sihT dradnats srevoc the stnemeriuqer of
tnemngisnoc llahs ton reffid morf each other yb
muimorhc latem desu ni muimorhC gniraeb
erom naht 3 .tnecrep
.syolla
2 SECNEREFER 3.3.3 Blended Lot Method
ehT gniwollof naidnI sdradnatS are yrassecen A tnemngisnoc detutitsnoc yb the dednelb tol
stcnujda ot siht :dradnats dohtem stsisnoc of a rebmun of stlem ( or parts
of suounitnoc taps) of eno grade ,noitangised
SI No. Title hcihw evah neeb dehsurc ot a elcitrap ezis ssel
1387 : 1967 lareneG stnemeriuqer for the naht 50 mm dna ylhguoroht .dexim
ylppus of lacigrullatem slairetam
(first revision ) ehT tnetnoc of the niam tneutitsnoc of the stlem
( or parts of suounitnoc taps ) gnitutitsnoc the
1472 : 1917 Methods of gnilpmas syolla-orref
tnemngisnoc yam yrav neewteb the muminim dna
for noitanimreted of lacimehc
mumixam stimil deificeps for the etairporppa
noitisopmoc (first revision )
grade .noitangised
3 YGOLONIMRET
4 SEDARG
roF the esoprup of siht ,dradnats the gniwollof
snoitinifed llahs .ylppa sihT dradnats srevoc 2 grades of muimorhC
,latem as deificeps ni elbaT 1.
3.1 muimorhC lateM
5 SRALUCITRAP OT EB DEIFICEPS ELIHW
nA gniyolla lairetam htiw a muminim muimorhc GNIREDRO
tnetnoc of 97 tnecrep yb ssam deniatbo yb
citylortcele/cimrehtollatem .noitcuder roF the tifeneb of the ,resahcrup sralucitrap ot
eb deificeps elihw gniredro for the lairetam ot
3.2 Cast ( tleM ) siht noitacificeps llahs eb as :swollof
ehT tcudorp of yna of the :gniwollof a) ytitnauq of the ;lairetam
)a eno ecanruf heat, or
)b noitutitsnoc of ;tnemngisnoc
b) eno tap of suounitnoc ,ecanruf or
4 a rebmun of ecanruf or elbicurc heats of c) eman of the ;lairetam
ralimis noitisopmoc dexim ni a eldal or
gnidloh ecanruf dna desu for gnikam a d) grade ;noitangised dna
cast.
e) ezis ;noitangised
3.3 Consignments
f) yrassecen stnemeriuqer for ,sisylana dna
muimorhC latem llahs eb dereviled ni -ngisnoc reports, gnikcap etc. as .etairporppa
stnem detutitsnoc yb eno of the gniwollof
tem hods.
6 YLPPUS FO SLAIRETAM
3.3.1 Tapped Lot Method lareneG stnemeriuqer gnitaler ot ylppus of the
lairetam ot siht noitacificeps llahs eb as dial
A tnemngisnoc detutitsnoc yb the tapped tol
nwod ni SI 1387 : 1967.
dohtem stsisnoc of a muimorhc latem ssam of
eno tlem ( or eno part of a suounitnoc tap ).
7 STNEMERIUQER
3.3.2 Graded Lot Method
7. I Constitution of Consignment
A tnemngisnoc detutitsnoc yb the graded tol
dohtem stsisnoc of a rebmun of stlem ( or parts muimorhC latem llahs eb dereviled ni -ngisnoc
of suounitnoc taps ) of eno muimorhc latem stnem detutitsnoc yb eno of the sdohtem denifed
.noitangised ni 3.3.

1
IS 2023:1993
7.2 CHEMICAL COMPOSITION llahs eb as nevig ni elbaT 2. ehT rednu ezis
seulav llahs eb dilav at the tniop of yreviled ot
7.2.1 Each tnemngisnoc of the lairetam llahs the .resahcrup
mrofnoc ot the stnemeriuqer of the lacimehc
8.2 fI the resahcrup seriuqer elcitrap ezis segnar
noitinopmoc deificeps ni elbaT 1 dna fi so -ificeps
ro/dna secnarelot other naht those nevig ni
ed yb the resahcrup at the emit of yriuqne dna
elbaT 2, these llahs eb agreed nopu neewteb the
order, the rerutcafunam llahs ylppus a test -itrec
reilppus dna the .resahcrup ehT rednu ezis
etacif of lacimehc sisylana of the elpmas of
seulav llahs eb dilav at the tniop of yreviled ot
lairetam for each .tlem
the .resahcrup
7.2.2 fI deificeps yb the resahcrup at the emit of
9 SUOENARTXE SNOITANIMATNOC
yriuqne dna order that each spmul of the -noc
tnemngis dluohs mrofnoc ot the lacimehc -moc ehT lairetam llahs eb ylbanosaer free morf
noitisop deificeps ni elbaT 1, siht llahs eb agreed suoenartxe snoitanimatnoc ekil gals dna
ot neewteb the resahcrup dna the .rerutcafunam cillatem-non ,snoisulcni etc.
NOTE ehT- lairetam gnignoleb ot a tsac ( tlem )
hcihw si tuo fo ,noitacificeps llahs ton eb dednelb ro 10 GNILPMAS
dexim htiw eht lairetam fo rehtona .tlem/tsac
Each tnemngisnoc of the lairetam llahs eb
delpmas ni ecnadrocca htiw SI 1472 : 1977.
7.3 ehT lacimehc noitisopmoc nevig ni elbaT 1
shows ylno the niam tneutitsnoc stnemele dna 11 PACKING
lausu .seitirupmi fI the resahcrup seriuqer resolc
segnar for the niam tnemele stnetnoc ro/dna ehT lairetam llahs eb packed ni elbatius
tnereffid stimil for deificeps stnemele ro/dna -non ,sreniatnoc ni seititnauq as yllautum agreed ot
deificeps ,stnemele siht llahs eb agreed ot neewteb neewteb the reilppus dna the .resahcrup
the resahcrup dna the .rerutcafunam
12 GNIKRAM
7.4 ihT lacimehc noitisopmoc of the lairetam ehT package gniniatnoc the lairetam llahs eb
llahs eb denimreted yb yna other dehsilbatse dekram htiw the :gniwollof
lacimehc/latnemurtsni .dohtem nI case of etupsid
the referee dohtem llahs eb agreed neewtab the a) s’reilppus eman or ,kram-edart
resahcrup dna the rerutcafunam llit the naidnI )b grade rebmun dna ezis ,noitangised
dradnatS si dehsilbup for the sdohtem of lacimehc
c) ,ytitnauq
sisylana of muimorhc .latem
d) date of ,erutcafunam dna
8 SIZE e) flehs ,efil fi .deriuqer
8.1 sselnU esiwrehto deificeps the lairetam llahs ehT lairetam yam osla eb dekram htiw the
eb deilppus ni spmul or as dehsurc dna deneercs dradnatS Mark. ehT noitamrofni si elbaliava
.selcitrap ehT elcitrap ezis segnar dna secnarelot htiw uaeruB of naidnI .sdradnatS

Table 1 Chemical Composition of Chromium Metal

( Clause 8.1 )
Grade Designation Percent
r-----____------- h__-_----__,----__~
Cr Al C FC iS S P N, SO
Mill Max Max Max Max Max
(1) (2) (3) (4) (5) (6) (7) (8) (9)
MCr97C06 97’0 0’50 0’06 0.35 0’5 0’05 0’05 0’05 0’05
to
&2 0’1
ECr99 99’0 0’1 SO@ 0’2 0’2 0’05 0’05 0’05 0’05
2ooto :fo
Table 2 Particle Size
( Clause 8.2 )
Size Designation Size Range Undersize, Percent Oversize, Percent
mm by Mass by Mass
~_~---A___~
Max Max
Over pU ot dna
gnidulcni
(1) (2) (3) (4) (5)
: 15 50 15 5 JO
: .: 5 2 5” ::10

2
I I
I
Standard Mark
I
ehT esu of the dradnatS Mark si denrevog yb the snoisivorp of the Bureau of Indian
Standards Act, 1986 and the seluR dna snoitalugeR edam .rednuereht ehT dradnatS Mark no
stcudorp derevoc yb na naidnI dradnatS syevnoc the ecnarussa that yeht evah neeb decudorp
ot ylpmoc htiw the stnemeriuqer of that dradnats rednu a llew denifed metsys of ,noitcepsni
gnitset dna ytilauq lortnoc hcihw si desived dna desivrepus yb SIB dna operated yb the
.recudorp dradnatS dekram stcudorp are osla ylsuounitnoc checked yb SIB for ytimrofnoc
ot that dradnats as a rehtruf .draugefas sliateD of snoitidnoc rednu hcihw a ecnecil for the
esu of the dradnatS Mark yam eb detnarg ot srerutcafunam or srecudorp yam eb deniatbo
morf the uaeruB of naidnI .sdradnatS
Bureau of [ndian Standards
SIB si a yrotutats noitutitsni dehsilbatse rednu the Bureau qf Indian Standards Acr, 1986 ot etomorp
suoinomrah tnempoleved of the seitivitca of ,noitazidradnats gnikram dna ytilauq noitacifitrec of goods
dna gnidnetta ot detcennoc srettam ni the .vrtnuoc
Copyright
SIB has the thgirypoc of lla sti .snoitacilbup No part of these snoitacilbup yam eb decudorper ni
yna mrof tuohtiw the roirp noissimrep ni gnitirw of .SIB sihT does ton edulcerp the free ,esu ni the
esruoc of gnitnemelpmi the ,dradnats of yrassecen ,sliated hcus as slobmys dna ,sezis epyt or grade
.snoitangised seiriuqnE gnitaler ot thgirypoc eb addressed ot the rotceriD ( snoitacilbuP ), .SIB
Review of fndisn Standards
stnemdnemA are deussi ot sdradnats as the deen sesira no the sisab of .stnemmoc sdradnatS are osla
deweiver ;yllacidoirep a dradnats gnola htiw stnemdnema si demriffaer nehw hcus weiver setacidni that on
segnahc are ;dedeen fi the weiver setacidni that segnahc are ,dedeen ti si nekat pu for .noisiver sresU of
naidnI sdradnatS dluohs niatrecsa that yeht are ni noissessop of the tsetal stnemdnema or noitide yb
gnirrefer ot the tsetal eussi of SIB‘ ’koobdnaH dna sdradnatS‘ ylhtnoM .’snoitiddA stnemmoC no siht
naidnJ dradnatS yam eb tnes ot SIB gnivig the gniwollof :ecnerefer
Dot : No DTM 05 ( 3754)
Amendments Issued Since Publication
dnemA No. Date of eussI txeT detceffA
UAERUB FO NAIDNI SDRADNATS
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