ASTM A550-16

Standard Specification for Ferrocolumbium (Ferroniobium)

ABSTRACT
This specification covers three grades of ferrocolumbium, designated low-alloy steel grade, alloy and stainless steel grade, and high-purity grade. The material shall conform to the requirements as to chemical composition. Also, the ferrocolumbium shall be available in the sizes and tolerances specified.
SCOPE
1.1 This specification covers three grades of Ferrocolumbium (ferroniobium), designated Low-Alloy Steel Grade, Alloy and Stainless Steel Grade, and High-Purity Grade.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

General Information

• Status: Historical
• Publication Date: 30-Apr-2016
• ICS: 77.100 - Ferroalloys
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A550 −16
Standard Specification for
1
Ferrocolumbium (Ferroniobium)
This standard is issued under the fixed designation A550; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* mentary requirements that are indicated in the purchase order.
Failure to comply with the general requirements of Specifica-
1.1 This specification covers three grades of Ferrocolum-
tion A1025 constitutes nonconformance with this specification.
bium (ferroniobium), designated Low-Alloy Steel Grade, Al-
In case of conflict between the requirements of this specifica-
loy and Stainless Steel Grade, and High-Purity Grade.
tion and Specification A1025, this specification shall prevail.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Chemical Composition
conversions to SI units that are provided for information only
and are not considered standard.
4.1 The material shall conform to the requirements as to
chemical composition specified in Tables 1 and 2. The manu-
2. Referenced Documents
facturer shall furnish an analysis of each shipment showing the
2
2.1 ASTM Standards:
percentage of each element specified in Table 1.
A1025 Specification for Ferroalloys and Other Alloying
4.2 For elements specified in Table 2 an analysis of each lot
Materials, General Requirements
E11 Specification for Woven Wire Test Sieve Cloth and Test is not required. Upon request of the purchaser, the manufac-
Sieves turer shall supply the results of an analysis for the elements
specified in Table 2 on a cumulative basis over a period
3. General Conditions for Delivery
mutually agreed upon by the manufacturer and the purchaser.
3.1 Materialsfurnishedtothisspecificationshallconformto
therequirementsofSpecificationA1025,includinganysupple-
5. Sizing
1 5.1 Ferrocolumbium(ferroniobium)isavailableinsizesand
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee to tolerances shown in Table 3.
A01.18 on Castings.
Current edition approved May 1, 2016. Published May 2016. Originally
6. Keywords
approved in 1965. Last previous edition approved in 2015 as A550 – 06 (2015).
DOI: 10.1520/A0550-16.
6.1 columbium (niobium); ferrocolumbium (ferroniobium);
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tantalum
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A550−16
TABLE 1 Chemical Requirements
Element Composition, %
Low-Alloy Steel Alloy and Stainless High-Purity
Grade Steel Grade Grade
A, E
Columbium (Niobium) 60.0–70.0 60.0–70.0 60.0–70.0
B
Tantalum, max 5.0 2.0 0.50
Carbon, max 0.5 0.3 0.10
Manganese, max 3.0 2.0 0.50
Silicon, max 4.0 2.5 0.40
C C D
Aluminum, max 3.0 2.0 2.0
Tin, max 0.25 0.15 0.02
Phosphorus, max
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A550 − 06 (Reapproved 2015) A550 − 16
Standard Specification for
1
Ferrocolumbium (Ferroniobium)
This standard is issued under the fixed designation A550; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers three grades of ferrocolumbium, Ferrocolumbium (ferroniobium), designated Low-Alloy Steel
Grade, Alloy and Stainless Steel Grade, and High-Purity Grade.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents
2
2.1 ASTM Standards:
A1025 Specification for Ferroalloys and Other Alloying Materials, General Requirements
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. General Conditions for Delivery
3.1 Materials furnished to this specification shall conform to the requirements of Specification A1025, including any
supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of
Specification A1025 constitutes nonconformance with this specification. In case of conflict between the requirements of this
specification and Specification A1025, this specification shall prevail.
4. Chemical Composition
4.1 The material shall conform to the requirements as to chemical composition specified in Tables 1 and 2. The manufacturer
shall furnish an analysis of each shipment showing the percentage of each element specified in Table 1.
4.2 For elements specified in Table 2 an analysis of each lot is not required. Upon request of the purchaser, the manufacturer
shall supply the results of an analysis for the elements specified in Table 2 on a cumulative basis over a period mutually agreed
upon by the manufacturer and the purchaser.
5. Sizing
5.1 Ferrocolumbium (ferroniobium) is available in sizes and to tolerances shown in Table 3.
6. Keywords
6.1 columbium; columbium (niobium); ferrocolumbium; ferrocolumbium (ferroniobium); tantalum
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved Nov. 15, 2015May 1, 2016. Published November 2015May 2016. Originally approved in 1965. Last previous edition approved in 20102015 as
A550 – 06 (2010).(2015). DOI: 10.1520/A0550-06R15.10.1520/A0550-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A550 − 16
TABLE 1 Chemical Requirements
Element Composition, %
Low-Alloy Steel Alloy and Stainless High-Purity
Grade Steel Grade Grade
A, E
Columbium (Niobium) 60.0–70.0 60.0–70.0 60.0–70.0
B
Tantalum, max 5.0 2.0 0.50
Carbon, max 0.5 0.3 0.10
Manganese, max 3.0 2.0 0.50
Silicon, max 4.0 2.5 0.40
C C D
Aluminum, max 3.0 2.0 2.0
Tin, max 0.25 0.15 0.02
Phosphorus, max 0.10 0.05 0.02
Sulfur, max 0.10 0.05 0.02
A
the The columbium (niobium) content of any shipment shall be reported to the
nearest 0.1 %.
B
Or 0.25 % maximum as agreed between purchaser and seller.
C
Or 1.50 % maximum as agreed between purchaser and seller.
D
Or 1.0 maximum as agreed between purchaser and seller.
E
Columbium (Cb) and niobium (Nb) refer to the same Element 41.
TABLE 2 Supplemental Chemical Requirements
NOTE 1—These are maximum limits allowable unless otherwise
A
stated.
A
Element Composition, %
Low-Alloy Alloy and Stainless High-Purity
Steel Grade Steel Grade Grade
Chromium 1.00 1.00 0.10
Tungsten 1.00 0.5 0.05
Titanium 1.00 1.0 0.10
Lead 0.25 0.01 0.01
Cobalt 0.25 0.05 0.05
A
The composition of the ferrocolumbian ferrocolumbium (ferroniobium) shall be
within these limits; however, an analysis of each lot is not required. Upon request,
the manufacturer shall supply the results of an analysis for these elements on
terms previously agreed upon by the manufacturer and pu
...