ASTM F1466-99(2010)

Standard Specification for Iron-Nickel-Cobalt Alloys for Metal-to-Ceramic Sealing Applications

ABSTRACT
This specification covers the property requirements and corresponding test methods for two iron-nickel-cobalt alloys in the forms of wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with alumina ceramics, for vacuum electronic applications. The two alloys covered here are UNS K94630 that contains nominally 29 % nickel, 17 % cobalt, and 53 % iron, and UNS K94620 that contains nominally 27 % nickel, 25 % cobalt and 48 % iron. When tested, the alloys shall comply to specified requirements for chemical composition, surface finish, temper, grain size, tensile strength, hardness, inclusion content, thermal expansion, transformation, and dimensions.
SCOPE
1.1 This specification covers two iron-nickel-cobalt alloys, the former, (UNS No. K94630), containing nominally 29 % nickel, 17 % cobalt, and 53 % iron, the latter, (UNS No. K94620), nominally 27 % nickel, 25 % cobalt and 48 % iron, in the forms of wire, rod, bar, strip, sheet, and tubing, intended primarily for brazed metal-to-ceramic seals with alumina ceramics, for vacuum electronic applications. Unless otherwise indicated, all articles apply to both alloys.
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.
1.3 The following hazard caveat pertains only to the test method portion, Sections 14 and 16 of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Sep-2010
• ICS: 21.140 - Seals, glands
• ICS: 77.080.10 - Irons
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F1466-99(2005) - Standard Specification for Iron-Nickel-Cobalt Alloys for Metal-to-Ceramic Sealing Applications
• Effective Date: 01-Oct-2010
• Replaced By: ASTM F1466-99(2015) - Standard Specification for Iron-Nickel-Cobalt Alloys for Metal-to-Ceramic Sealing Applications
• Effective Date: 01-Jul-2015

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:F1466 −99(Reapproved2010)
StandardSpecification for
Iron-Nickel-Cobalt Alloys for Metal-to-Ceramic Sealing
Applications
This standard is issued under the fixed designation F1466; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Determine Conformance with Specifications
E45Test Methods for Determining the Inclusion Content of
1.1 This specification covers two iron-nickel-cobalt alloys,
Steel
the former, (UNS No. K94630), containing nominally 29%
E92TestMethodforVickersHardnessofMetallicMaterials
nickel, 17% cobalt, and 53% iron, the latter, (UNS No.
(Withdrawn 2010)
K94620), nominally 27% nickel, 25% cobalt and 48% iron,
E112Test Methods for Determining Average Grain Size
in the forms of wire, rod, bar, strip, sheet, and tubing, intended
E140Hardness Conversion Tables for Metals Relationship
primarily for brazed metal-to-ceramic seals with alumina
ceramics,forvacuumelectronicapplications.Unlessotherwise
Among Brinell Hardness, Vickers Hardness, Rockwell
indicated, all articles apply to both alloys.
Hardness, Superficial Hardness, Knoop Hardness, and
Scleroscope Hardness
1.2 The values stated in inch-pound units are to be regarded
E228Test Method for Linear Thermal Expansion of Solid
as standard. The values given in parentheses are mathematical
Materials With a Push-Rod Dilatometer
conversions to SI units that are provided for information only
E354 Test Methods for Chemical Analysis of High-
and are not considered standard.
Temperature,Electrical,Magnetic,andOtherSimilarIron,
1.3 The following hazard caveat pertains only to the test
Nickel, and Cobalt Alloys
method portion, Sections 14 and 16 of this specification. This
E1019Test Methods for Determination of Carbon, Sulfur,
standarddoesnotpurporttoaddressallofthesafetyconcerns,
Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser
Alloys by Various Combustion and Fusion Techniques
of this standard to establish appropriate safety and health
E1060E1060 HAS NO ENTRY IN SAD_TITLES
practices and determine the applicability of regulatory limita-
tions prior to use.
3. Ordering Information
2. Referenced Documents
3.1 Ordersformaterialunderthisspecificationshallinclude
2.1 ASTM Standards:
the following information:
D1971Practices for Digestion of Water Samples for Deter-
3.1.1 Alloy, as indicated with UNS number,
minationofMetalsbyFlameAtomicAbsorption,Graphite
Furnace Atomic Absorption, Plasma Emission 3.1.2 Size,
Spectroscopy, or Plasma Mass Spectrometry
3.1.3 Temper designation (Section 6),
E3Guide for Preparation of Metallographic Specimens
3.1.4 Surface finish (Section 10),
E8Test Methods for Tension Testing of Metallic Materials
3.1.5 Marking and packaging (Section 19), and
E18Test Methods for Rockwell Hardness of Metallic Ma-
3.1.6 Certification, if required. Please note that certification
terials
should include traceability of the heat to the original manufac-
E29Practice for Using Significant Digits in Test Data to
turer.
This specification is under the jurisdiction of ASTM Committee F01 on
4. Chemical Requirements
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
Materials.
4.1 Each alloy shall conform to the requirements as to
Current edition approved Oct. 1, 2010. Published November 2010. Originally
chemical composition prescribed in Table 1.
approved in 1993. Last previous edition approved in 2005 as F1466– 99(2005).
DOI: 10.1520/F1466-99R10.
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 last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1466−99(Reapproved2010)
TABLE 1 Chemical Requirements TABLE 3 Tensile Strength Requirements for Wire and Rod
Tensile Strength, ksi (MPa)
NOTE 1—Round observed or calculated values to the nearest unit in the
Temper
UNS No. K94620
last right-hand place of figures used in expressing the limiting value, in
Designation
UNS No. K94630
(Nominal Values)
accordance with the rounding-off method of Practice E29.
A 85 (586) max 85 (586) max
Element UNS No. K94630 UNS No. K94620
B 85 to 105 (586 to 724) 85 to 100 (586 to 689)
A A
Iron, nominal remainder remainder
C 95 to 115 (655 to 793) 95 to 110 (655 to 758)
A A
Nickel, nominal 29 27
D 105 to 125 (724 to 862) 105 to 120 (724 to 827)
A A
Cobalt, nominal 17 25
E 125 (862) min 120 (827) min
Manganese, max 0.35 0.35
Silicon, max 0.15 0.15
Carbon, max 0.02 0.02
B B
Aluminum, max 0.01 0.01
B B
Magnesium, max 0.01 0.01
7. Grain Size
B B
Zirconium, max 0.01 0.01
B B
Titanium, max 0.01 0.01
7.1 Strip and sheet for deep drawing shall have an average
Copper, max 0.20 0.20
grain size not larger thanASTM No. 5 (Note 2), and no more
Chromium, max 0.03 0.03
Molybdenum, max 0.06 0.06 than 10% of the grains shall be larger than No. 5 when
C C
Phosphorus, max 0.006 0.006
measured in accordance with Test Methods E112.
C C
Sulfur, max 0.006 0.006
A
NOTE2—Thiscorrespondstoagrainsizeof0.065mm,or16grains/in.
Theiron,nickel,andcobaltrequirementsarenominalandmaybeadjustedby
2 of image at 100×.
themanufacturertomeettherequirementsforthecoefficientofthermalexpansion
as specified in 12.1.
B 7.2 Finer grain sizes for deep drawing quality shall be
The total of aluminum, magnesium, titanium, and zirconium shall not exceed
0.04 %. negotiated between user and supplier.
C
The total of phosphorus and sulfur shall not exceed 0.010. %.
8. Hardness
8.1 Deep-DrawingTemper—Fordeepdrawing,thehardness
5. Surface Lubricants
shall not exceed 82 HRB for material 0.100 in. (2.54 mm) and
5.1 All lubricants used during cold-working operations,
less in thickness, and 85 HRB for material over 0.100 in. in
such as drawing, rolling, or spinning, shall be capable of being
thickness when determined in accordance with Test Methods
removed readily by any of the common organic degreasing
E18. See also Test Method E92 for Vickers Hardness Testing
solvents.
and tables in E140.
8.2 Rolled and Annealed Tempers—Hardness tests when
6. Temper
properlyappliedcanbeindicativeoftensilestrength.Hardness
6.1 The desired temper of the material shall be specified in
scales and ranges for these tempers, if desirable, shall be
the purchase order.
negotiated between supplier and purchaser.
6.2 Tube—Unless otherwise agreed upon between the sup-
plier or the manufacturer and the purchaser, these forms shall 9. Tensile Strength
begivenafinalbrightannealbythemanufacturerandsupplied
9.1 Strip and Sheet:
in the annealed temper.
9.1.1 Tensile strength shall be the basis for acceptance or
6.3 StripandSheet—Theseformsshallbesuppliedinoneof rejection for the tempers given in Table 2 and shall conform
the tempers given in Table 2 or in deep-drawing temper, as with the requirements prescribed.
specified. 9.1.2 Tension test specimens shall be taken so the longitu-
dinalaxisisparalleltothedirectionofrollingandthetestshall
6.4 Wire and Rod—These forms shall be supplied in one of
be performed in accordance with Test Methods E8.
the tempers given in Table 3 as specified. Unless otherwise
specified, the material shall be bright annealed and supplied in 9.2 Wire and Rod:
Temper A (annealed). 9.2.1 Tensile strength shall be the basis for acceptance or
rejection for the tempers given in Table 3 and shall conform to
NOTE 1—For rod forms, air anneal, followed by centerless grinding to
the requirements prescribed.
remove scale, is an acceptable alternate.
9.2.2 The test shall be performed in accordance with Test
Methods E8.
TABLE 2 Tensile Strength Requirements for Strip and Sheet
Tensile Strength, ksi (MPa)
10. Surface Finish
Temper Temper
UNS No. K94620
Designation Name
UNS No. K94630
(Nominal Values) 10.1 The standard surface finishes available shall be those
resulting from the following operations:
A annealed 82 max (565 max) 85 max (586 max)
B ⁄4hard 75to90(517to 85 to 100 (586 to
10.1.1 Hot rolling,
621) 689)
10.1.2 Forging,
C half hard 85 to 100 (586 to 95 to 110 (655 to
689) 758) 10.1.3 Centerless grinding (rod),
D ⁄4 hard 95 to 110 (655 to 105 to 120 (724 to
10.1.4 Belt polishing,
758) 827)
10.1.5 Cold rolling, and
E hard 100 min (689 min) 120 min (827 min)
10.1.6 Wire and rod drawing.
F1466−99(Reapproved2010)
11. Inclusion Content least 4 h. After the low-temperature treatment, examine the
specimen at a magnification of 150× for the presence of the
11.1 Wire, Rod, Bar, Strip and Sheet—These product forms
acicular crystals characteristic of the alpha phase. Because
shallbefreeofinclusions,cracks,blowholesandotherdefects
thesecrystalsmayoccuronlyinsmalllocalizedareas,examine
that are detrimental to the quality of subsequent product. The
carefully the entire polished cross section.
maximum inclusion rating number shall be 2 for Inclusion
Types,A, B, C and D in both the thin and heavy series shown
NOTE 5—Asuggested etchant is a solution of three parts by volume of
concentrated hydrochloric acid and one part of concentrated nitric acid
in Plate I using Practice E45, Method A, Worst-Field Tech-
saturated with cupric chloride (CuCl ·2H O). This etchant is more
2 2
nique.
effective when allowed to stand for 20 min after mixing. After several
NOTE3—Thetestforinclusionsmaybeperformedonbilletsections.In hours it loses its strength and should be discarded at the end of the day.
Etching is best accomplished by swabbing the specimen with cotton
suchcases,thesamplesectionmustincluderegionsthatcorrespondtothe
top of the ingot. soaked with the etchant. Etching is usually complete when the surfac
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