IS 1171: Ferromanganese

2011·0.91 MB·English

by  Bureau of Indian Standards

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IS 1171 (2011): Ferromanganese [MTD 5: Ferro Alloys]
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IS 1171: 2011
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Indian Standard
FERROMANGANESE — SPECIFICATION
( Fifth Revision )
ICS 77.100
© BIS 2011
B U R E A U O F I N D I A N S T A N D A R D S
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002
December 2011 Price Group 2
Ferro Alloys Sectional Committee, MTD 5
FOREWORD
This Indian Standard (Fifth Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by
the Ferro Alloys Sectional Committee had been approved by the Metallurgical Engineering Division Council.
This standard was first published in 1957 and was subsequently revised in 1964, 1973, 1988 and 1996. In view of
the experience gained during these years, it was felt necessary to revise this standard. In this revision, the following
main modifications have been made:
a) Scope has been modified;
b) Keeping in view the international trade, and conditions prevalent in India, a grade of medium carbon
ferromanganese has been added and numbers of grades of low carbon ferromanganese have been reduced;
and
c) Particle size ranges have been modified and aligned with international standards on ferromanganese.
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 with IS2:1960
‘Rules for rounding 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.
IS 1171 : 2011
Indian Standard
FERROMANGANESE — SPECIFICATION
( Fifth Revision )
1 SCOPE b) One tap of continuous furnace; or
c) A number of furnace or crucible heats of
This standard covers the requirements and condition
similar composition mixed in a ladle or
of delivery for ferromanganese used by iron and steel
holding furnace and used for making a cast.
industry and foundries.
3.3 Consignment
2 REFERENCES
3.3.1Tapped Lot Method—A consignment constituted
The following standards contain provisions which
by the tapped lot method consists of a ferromanganese
through reference in the text, constitute provisions of
mass of the one melt (or one part of continuous tap).
this standard. At the time of publication, the editions
indicated were valid. All standards are subject to 3.3.2 Graded Lot Method — A consignment
revision and parties to agreement based on this standard constituted by the graded lot method consists of a
are encouraged to investigate the possibility of applying number of melts (or parts of continuous taps) of one
the most recent editions of the standards indicated ferromanganese designation. The manganese content
below: of the melts (or part of continuous taps) constituting
the consignment shall not differ from each other by
IS No. Title
more than 3 percent absolute.
1387 : 1993 General requirements for the supply
3.3.3 Blended Lot Method — A consignment
of metallurgical materials (second
constituted by the blended lot method consists of a
revision)
number of melts (or parts of continuous taps) of one
1472 : 1977 Methods for sampling ferro alloys for
ferromanganese designation, which have been crushed
determination of chemical
to a particle size less than 50 mm and thoroughly
composition (first revision)
mixed. The content of the main constituent of the melts
1559 : 1961 Methods of chemical analysis of
(or parts of continuous taps) constituting the
ferro alloys
consignment may vary between the minimum and the
maximum limit specified for the appropriate
3 TERMINOLOGY
ferromanganese designation.
For the purpose of this standard, the following
4 GRADES
definitions shall apply.
This standard covers 13 grades of ferromanganese as
3.1 Ferromanganese — A master alloy of iron and
specified in Table 1.
manganese with a minimum manganese content of
65percent by mass, and maximum manganese content
5 PARTICULARS TO BE SPECIFIED WHILE
of 95 percent by mass, obtained by reduction from the
ORDERING
corresponding raw materials.
For the benefit of the purchaser, particulars to be
3.1.1 Ferromanganese Low Carbon —
specified while ordering for the material to this
Ferromanganese having a mass fraction of carbon upto
specification shall be as follows:
0.5 percent.
a) Quantity of the material;
3.1.2 Ferromanganese Medium Carbon —
b) Constitution of consignment;
Ferromanganese having a mass fraction of carbon in
the range from 0.5 percent to 2.0 percent. c) Name of the material;
d) Grade;
3.1.3 Ferromanganese High Carbon —
e) Size range; and
Ferromanganese having a mass fraction of carbon in
the range from 6.0 percent to 8.0 percent. f) Necessary requirements for analysis reports,
packing, etc, as appropriate.

3.2 Cast (Melt) — The product of any of the following:
a) One furnace heat; or
1
IS 1171 : 2011
6 SUPPLY OF MATERIALS 7.2.4 The chemical composition of the material shall
be determined either by the method specified in IS 1559
General requirements relating to supply of the material
or any other established instrumental chemical method.
to this specification shall be as laid down in IS 1387.
In case of dispute, the procedure given in IS 1559 shall
7 REQUIREMENTS be the referee method. However, where the method is
not given in IS 1559 the referee method shall beas
7.1 Constitution of Consignment agreed to between the purchaser and the manufacturer.
Ferromanganese shall be delivered in consignment
8 SIZE RANGE
constituted by one of the methods defined in 3.2.
8.1 The material is supplied in lumps or as crushed
7.2 Chemical Composition and screened particles. The particle size ranges and
7.2.1 Each consignment of the material shall conform tolerances shall be as given in Table 2. The undersize
to the requirements of the chemical composition values shall be valid at the point of delivery to the
specified in Table 1 and if so specified by the purchaser purchaser.
at the time of enquiry and order, shall supply a test
8.2 In size designation 1, 2 and 3, the -3 mm fraction
certificate of chemical analysis of the sample of
shall not exceed 5 percent.
material for each melt.
7.2.2 If specified by the purchaser at the time of enquiry Table 2 Particle Size Range
and order that each lump of the consignment should (Clause 8.1)
conform to the chemical composition specified in
Sl Class Particle Size Undersize, Max, Oversize, Max,
Table1, this shall beas agreed to between the purchaser
No. Range Percent by Mass Percent
and the manufacturer. mm by Mass
Total Below 3.15
7.2.3 The chemical composition given in Table 1 shows mm
only the main constituent elements and the usual (1) (2) (3) (4) (5) (6)
impurities. If the purchaser requires closer ranges for i) 1 100-315 15 51) 10
the main element contents and/or different limits for ii) 2 25-200 15 71) No piece to
iii) 3 10-100 15 71) exceed 1.15 ×
specified elements and/or non-specified elements this
iv) 4 3.15-50 — 7 — the maximum
shall beas agreed to between the purchaser and the v) 5 3.15-25 — 7 — limit of the size
manufacturer. vi) 6 Up to 3.15 — — — range specified
in two or three
directions
Table 1 Chemical Composition of
1)If not otherwise specified, these values are for information only.
Ferromanganese
(Clauses 4, 7.2.1, 7.2.2 and 7.2.3)
9 EXTRANEOUS CONTAMINATIONS
Sl Grade Percent
The material shall be reasonably free from extraneous
No. Designation
Mn C Si S P contaminations like slag and non-metallic inclusion.
Max Max Max
(1) (2) (3) (4) (5) (6) (7) 10 SAMPLING
i) High carbon ferromanganese: Each consignment of the material shall be sampled in
a) FeMn 80 78-82 6-8 1.50 0.050 1)
accordance with IS 1472.
b) FeMn 76 74-76 6-8 1.50 0.050 1)
c) FeMn 72 70-74 6-8 1.50 0.050 1)
d) FeMn 68 65-70 6-8 1.50 0.050 1) 11 PACKING
e) FeMn 74 72-76 6-8 1.50 0.030 1)
The material shall be packed in suitable containers, or
ii) Medium carbon ferromanganese:
shipped in bulk, or as mutually agreed to between the
a) 2 FeMn 80 78-82 1.0-3.0 1.50 0.030 0.35
supplier and the purchaser.
b) 2 FeMn 76 74-78 1.0-3.0 1.50 0.050 0.35
c) 2 FeMN 72 70-74 1.0-3.0 1.50 0.030 0.45
iii) Low carbon ferromanganese2): 12 MARKING
a) 02 FeMn 72 70-74 0.20 Max 1.00 0.050 0.30 The packing containing the material shall be marked
b) 02 FeMn 78 75-80 0.20 Max 3.00 0.050 0.30
legibly and indelibly with the following:
c) 02 FeMn 83 80-85 0.20 Max 3.00 0.050 0.30
1) Phosphorus (P) content shall have any of the 3 limits: 0.25percent a) Supplier’s name or trade-mark;
Max; or 0.35 percent, Max; or 0.45 percent, Max.
b) Grade designation. and size;
2) Aluminium content shall be 0.5 percent, Max when produced by
alumino thermic process. c) Quantity;
2
IS 1171 : 2011
d) Date of manufacture; and 12.1.1 The use of the Standard Mark is governed by
e) Shelf life, if needed. the provisions of Bureau of Indian Standards Act, 1986
and the Rules and Regulations made thereunder. The
12.1 BIS Certification Marking details of conditions under which the licence for the
use of Standard Mark may be granted to manufacturers
The material may also be marked with the Standard
or producers may be obtained from the Bureau of
Mark.
Indian Standards.

3
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This Indian Standard has been developed from Doc No.: MTD 5 (4802).
Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
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