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है”ह”ह

IS 11890 (1987): High purity aluminium ingot for remeltingfor special applications [MTD 7: Light Metals and theirAlloys]

IS : 11890 - 1987

Indian Standard SPECIFICATION FOR

HIGH PURITY PRIMARY ALUMINIUM INGOTS ‘FOR REMELTING FOR

SPECIAL APPLICATIONS

Light Metals andTheir Alloys Sectional Committee, SMDC 10

Chairman

DR RAJENDRA KUMAR

Members

Reptwnting

Regional Research Laboratory ( CSIR ), Bhopal

ADDITIONAL DIRECTOR ( MET ), Ministry of Railways RDSO, LUCKNOW

SHRI V. K. A~RAWAL Hindustan Aluminium Corporation Ltd, Renukoot SHRI N. G. SHARMA ( Alternate I ) SHRI S. P. S. MERTA ( Altcrnatc II )

SHRI PREM BAVEJA Hindustan Aeronautics Ltd, Bangalore Snsr R. KUPPASWAMY ( Alttrnafe )

SHRI S. C. BRAWAL National Test House, Calcutta SHRI S. C. SHARMA ( Alternate )

SHRI A. T. BORATE SRRI P. P. KINI ( Afternate )

The Premier Automobiles Ltd, Bombay

SHRI C. R. CEAKRAVORTY Ministry of Defence Hyderabad )

(R&D) (DMRL

SHRI R. S. CHOPRA Jaya Hind Industries Ltd, Pune SHRI R. D. MATHUR ( Alternate )

DIRECTOR National Metallurgical Laboratory Jamshedpur

( CSIR ),

DIRECTOR ( MET ) Development Commissioner Industries ), New Delhi

( Small Scale

SHRI T. N. BASU ( Alternate ) SHRI P. S. DES~AN Central Electrochemical Research Institute ( CSIR ),

Karaikudi SHRI R. SVBRAMANIAN ( Alternate )

SHRI A. K. HAJRA Indian Aluminium Co Ltd, Calcutta SHRI K. SUHYANARAYANAN ( Alternate )

SHRI A. V. HARNE Bharat Heavy Electricals Ltd SHRI K. K. SENQODAN ( Alfrmnatc )

( Continued on page 2 )

@ CoPyright 1987

BUREAU OF INDIAN STANDARDS

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

IS : 11890 - 1987

( Continuedfrom page 1 )

Members Repreranting

JOINT DIRECTOR STANDARDS Ministry of Railways ( C4rt~t.4~~ ), RDSO, LUCKNOW

SRRI S. K. MEHROTRA Bharat Aluminium CO Ltd SHRI D. MUK~ERJEE (Alternate)

SHRI 0. P. M~THUR ’ Electrical Manufacturing Co Ltd, Calcutta SI~RI S. C. MALHOTRA ( Alternate )

SLIRI L. MI~HRA Directorate General of Technical Development, New Delhi

SRRI M. J. Pootc Premier Irrigation Equipment Ltd, Calcutta SERI K. K. SINE.4 ( Alternate )

SIIRI N. PUNNUSWAMY Madras Aluminium Co Ltd, Mettur Dam SHRI M. SAYIYULLAH ( Alternate )

SHRI K. R. RA~RUNATK Jindal Aluminium Ltd, Bangalore SARI A. K. SWAMI ( Alternate )

SHRI R. RAMDAS Ministry of Finance ( Indian Government Mint,

SHRI V. K. SAC~DEVA Hyberabad )

Directorate of Technical Development and Produ- ction ( AIR ), ( Ministry of Defence ), New Delhi

SHRI K. M. SIIWA ( Alternate ) SHRI R. N. SAHA Directorate General of Supplies & Disposals, New

Delhi SHRI DIPANKAR KIRTI ( Alternate )

DR M. S. SESHADRI Indian Pistons Ltd, Madras SHRI R. P. SHAHI Ministry of Defence ( DGI )

SRRI K. D. SWAMI ( Alternate ) SHRI H. K. STIARAFP Federation of Engineering Industries of India,

New Delhi SHRI H. L. BHARDWAJ ( Alternate )

SHRI D. SIVASUBRAMANIAM Aluminium Industries Ltd, Madras SRRI S. GOPALAKRISIINAN ( Alternate )

SHRI B. VIDYANT Ordnance Factory Board ( Ministry of Defence) I Ordnance Factory. Nagpur )

SHRI S. TATA ( Alternate ) SHRI K. RAOHAVKNDXAN.

Director ( Strut & Met) Director General, BIS ( Ex-o#cio Mcmbrr )

Secretary

SRRI JAQMOHAN SINGE Deputy Director ( Metals ), BIS

ISr11890- 1987

Indian Standard SPECIFICATION FOR

HIGH PURITY PRIMARY ALUMINIUM INGOTS ‘FOR REMELTING FOR

SPECIAL APPLICATIONS

0. FOREWORD ’

0.1 This standard was adopted by the Indian Standards Institution on 15 January 1987, after the draft finalized by the Light Metals and Their Alloys Sectional Committee had been approved by the Structural and Metals Division Council.

0.2 This standard has been formulated with a view that high purity aluminium ingots are required for special end uses in electrical, electro- nics, chemical, aerospace industries and for cathodic protection system and other special applications. This standard covers four grades of 99.95, 99.90, 99.85 and 99 80 percent minimum aluminium content and intends to help both producers and consumers in their day to day transactions.

0.3 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 anlaysis, shall be rounded off in accord- ance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1. SCOPE

1.1 This standard covers the requirements for 99.95, 99.90, 99.85 and 99.80 percent primary aluminium ingots for remelting for special applications.

2. TERMINOLOGY

2.0 For the purpose of this standard, the following definition shqll apply.

*Rules for rounding off numerical value ( revised ).

3

IS:11890 - 1987

2.1 Cast - It shall be defined as one of the folIowing:

a) The product of one furnace melt, or

b) The product of a number of furnace melts mixed prior to casting.

3. SUPPLY OF YATERIAL

3.1 General requirements relating to the supply of ingots to IS : 10259-1982*.

3.2 The ingots shall be reasonably free from slag or dross.

4. MANUFACTURE

shall conform

4.1 The ingots shall be manufactured from primary aluminium.

4.2 No scrap shall be used in the production of the material except that which has accumulated during the process of manufacture of the material and which has not been remelted except by the manufacturer.

5. GRADES

a) High Purim Grade I - Ingots of 99.95 percent primary aluminium.

b) High Purity Grade 2 - Ingots of 99.90 percent primary aluminium.

c) High Purity Grade 3 - Ingots of 99.85 percent primary aluminium.

d) High Purity Grade 4 - Ingot; of 99.80 percent primary aluminium.

6. CHEMICAL COMPOSITION

6.1 The ingots will have the chemical composition, as given in Table 1.

TABLE 1 CHEMICAL COMPOSITION OF HIGH PURITY PRIMARY ALUMINIUM FOR REMELTING FOR SPECIAL APPLICATION

COMPOSITION LIMITS ARE IN PERCENT MAXIWJEJ UNLESS SHOWN OTHERWISE

r_----_--__--*--_-__-_----7

Grade HP Grade I HP Grade 2 HP Grads 3 HP Grade 4 IS Designation 19958 19900 19850 19800 Aluminium,Min 9995 9990 99’85 99’80

. Copper O*OlO 0.02 0.03 0.03

Silicon 0.030 O-07 o-10 0.15

Iron 0.040 o-07 o-12 0’15

Manganese O*OlO 0.01 o-02 0’03

Magnesium O*OlO 0.01 0.02 0.02

Zinc 0.010 o-03 0’03 o-03

Titanium + Vanadium 0.010 0.05 o-05 o-05

Gallium O*OIO cl*03 o-03 0.03

Other elements ( each ) o-005 O-01 0.01 o-02

NOTE - Aluminium shall be determined by difference.

*General conditions of delivery and inspection of aluminium and aluminium alloy products.

4

IS : 11890 - 1987

6.1.1 The chemical composition shall be determined either by the method specified in IS : 504-1963* or any other established instrumental/ chemical method. In case of dispute the procedure specified in IS : 504- 1963* shall be the referee method.

7. SHAPES AND SIZES

7.1 Unless otherwise agreed, the shapes and sizes of ingots shall be in accordance with IS : 1820-19797.

8. SELECTION OF SAMPLES FOR ANALYSIS

8.1 At least one sample shall be selected at random from every 4 000 kg, or part thereof, of each cast.

8.2 Samples shall be obtained by one of the following methods:

a) Wherever possible, directly from the stream of metal filling the moulds midway through the pour, or

b) From ingot by any suitable mechanical method SO as to get a true representative sample of the ingot.

8.3 Retest - If a sample selected for testing fails to meet the requirements of the specification, two further samples shall be taken from the same lot of metal. If either of these samples fails to meet require- ments of the specification, the whole lot of the metal represented by the sample shall be rejected.

9. MARKING

9.1 All ingots shall be identified by such marking as shall ensure full identification of the material. The supplier shall furnish along with each consignment a certificate giving chemical composition of all the casts to which the ingots belong in that consignment.

9.1.1 The ingots may also be marked with the Standard Mark.

NOTE - The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and suoervised bv BIS and ouerated bv the oroducer. Standard marked oroducts are also continuously checked by BIS for ‘conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.

*Method of chemical analysis of aluminium and aluminium alloy ( rcvitcd ).. TRecommended shapes and sizes of aluminium notched bars and ingots for remelting

purpose ( jrst rcursion ).

5

INTERNATIONAL SYSTEM OF UNITS ( SI UNITS )

Base Units

QUANTITY

Length

Mass

Time

Electric current . Thermodynamic

temperature

Luminous intensity

Amount of substance

Ssspplemenhry Units

QUANTITY

Plane angle

Solid angle

Derived Units

QUANTITY

Force

Energy

Power

FluX

Flux density

Frequency

Electric conductance

Electromotive force

Pressure, stress

UNIT

metre

kilogram

second

ampere

kelvin

candela

mole

UNIT

radian

steradian

UNIT

newton

joule

watt

weber

tesla

hertz

siemens

volt

Pascal

SYXBOL

m

kg S

A

K

cd

mol

SYMBOL

rad

sr

SYMBOL

N

J W

Wb

T

HZ

S

V

Pa

1 N = 1 kg.m/s*

1 J = 1 N.m

1 W=lJ/s

1 Wb = 1 V.s

1 T- 1 Wb/m*

1 He = 1 c/a (.B*)

1 s - 1 A/V

1 v = 1 W/A

1 Pa = 1 N/m’

,