ASTM A101-93(2000)
(Specification)Standard Specification for Ferrochromium
Standard Specification for Ferrochromium
SCOPE
1.1 This specification covers two types of ferrochromium designated as high carbon and low carbon, the latter including nitrogen-bearing and vacuum grades.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 101 – 93 (Reapproved 2000)
Standard Specification for
Ferrochromium
This standard is issued under the fixed designation A 101; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Chemical Composition
1.1 This specification covers two types of ferrochromium 4.1 The various grades shall conform to the requirements as
designated as high carbon and low carbon, the latter including to chemical composition specified in Table 1 and Table 2.
nitrogen-bearing and vacuum grades. 4.2 The manufacturer shall furnish an analysis of each
1.2 The values stated in inch-pound units are to be regarded shipment showing the elements specified in Table 1.
as the standard. The SI units given in parentheses are for 4.3 The values shown in Table 2 are expected maximums.
information only. Upon request of the purchaser, the manufacturer shall furnish
an analysis for any of these elements on a cumulative basis
2. Referenced Documents
over a period mutually agreed upon by the manufacturer and
2.1 ASTM Standards: the purchaser.
E 29 Practice for Using Significant Digits in Test Data to
5. Size
Determine Conformance with Specifications
E 31 Methods for Chemical Analysis of Ferroalloys 5.1 The various grades are available in sizes as listed in
E 32 Practices for Sampling Ferroalloys and Steel Additives Table 3.
for Determination of Chemical Composition 5.2 The sizes listed in Table 3 are typical, as shipped from
E 363 Test Methods for Chemical Analysis of Chromium the manufacturer’s plant. These alloys exhibit varying degrees
and Ferrochromium of friability; therefore, some attrition may be expected in
transit, storage, and handling. A quantitative test is not avail-
3. Ordering Information
able for rating relative friability of ferroalloys. A code system
3.1 Orders for material under this specification shall include
has been developed, therefore, for this purpose, and a number
the following information: rating for each product type is shown in the last column of
3.1.1 Quantity, Table 3. Definitions applicable to these code numbers are given
3.1.2 Name of material,
in the Appendix.
3.1.3 ASTM designation and year of issue,
6. Sampling
3.1.4 Grade,
3.1.5 Size, and 6.1 The material shall be sampled in accordance with
3.1.6 Requirements for packaging analysis reports, etc., as Practices E 32.
appropriate. 6.2 Other methods of sampling mutually agreed upon by the
3.2 Although ferrochromium is purchased by total net manufacturer and the purchaser may be used; however, in case
weight the customary basis of payment is per pound of of discrepancy, Practices E 32 shall be used for referee.
contained chromium.
7. Chemical Analysis
7.1 The chemical analysis of the material shall be made in
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
accordance with the procedure for the ferroalloys as described
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
in Method E 31 and Test Methods E 363 or alternative methods
A01.18 on Castings.
that will yield equivalent results.
Current edition approved Dec. 15, 1993. Published April 1994. Originally
published as A 101 – 25 T. Last previous edition A 101 – 80 (1985)e .
7.2 If alternative methods of analysis are used, in case of
Annual Book of ASTM Standards, Vol 14.02.
discrepancy, Method E 31 and Test Methods E 363 shall be
Annual Book of ASTM Standards, Vol 03.05.
used for referee.
Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 101 – 93 (2000)
A
TABLE 1 Chemical Requirements
Composition, %
Type Ferrochromium
Sulfur, Phosphorus,
Grade Chromium Carbon Silicon Nitrogen
max max
High carbon A 51.0–56.0 6.0–8.0 6.0 max 0.040 0.030 .
B 56.0–62.0 6.0–8.0 8.0–14.0 0.050 0.030 .
C 62.0 min 6.0–8.0 3.0 max 0.050 0.030 .
Low carbon A 60.0–67.0 0.025 max 1.0–8.0 0.025 0.030 . . .
B 67.0–75.0 0.025 max 1.0 max 0.025 0.030 . . .
C 67.0–75.0 0.050 max 1.0 max 0.025 0.030 . . .
D 67.0–75.0 0.75 max 1.0 max 0.025 0.030 . . .
Vacuum low carbon E 66.0–70.0 0.015 max 2.0 max 0.030 0.030 .
G 63.0–68.0 0.050 max 2.0 max 0.030 0.030 5.0–6.5
Nitrogen bearing 62.0–70.0 0.10 max 1.0 max 0.025 0.030 1.0–5.0
A
For purposes of determining conformance with this specification, the reported analysis shall be rounded to the nearest unit in the last right-hand place of figures used
in expressing the limiting value, in accordance with the rounding method of Recommended Practice E 29.
A
TABLE 2 Supplementary Chemical Requirements
Composition, max, %
Type
B
High Carbon Low Carbon Vacuum Low Carbon Nitrogen Bearing
Grade A, B C All Grades E F —
CC
Nitrogen 0.050 0.050 0.12 0.050
Manganese 0.75 0.75 0.75 0.75 0.75 0.75
Nickel 0.50 0.50 0.50 0.50 0.50 0.50
Vanadium 0.50 0.50 0.50 0.50 0.50 0.50
Copper 0.050 0.050 0.050 0.050 0.050 0.050
Molybdenum 0.050 0.050 0.050 0.050 0.050 0.050
Columbium 0.050 0.050 0.050 0.050 0.050 0.050
Tantalum 0.050 0.050 0.050 0.050 0.050 0.050
Cobalt 0.10 0.10 0.10 0.10 0.10 0.10
Aluminum 0.25 0.25 0.10 0.10 0.10 0.10
Titanium 0.50 0.
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.