ASTM F31-05

Standard Specification for 42% Nickel-6% Chromium-Iron Sealing Alloy

ABSTRACT
This specification covers iron-nickel-chromium alloy (UNS K94760) used primarily for glass-sealing applications in electronic devices. The chemical composition of the material shall conform to the requirements prescribed. Chemical analysis shall be made, when desired, in accordance with the prescribed requirements. The average linear coefficient of thermal expansion shall be within limits of the requirements specified. The material shall be commercially smooth, uniform in cross section, in composition, and in temper; it shall be free of scale, corrosion, cracks, seams, scratches, slivers, and other defects.
SCOPE
1.1 This specification covers an iron-nickel-chromium alloy (UNS K94760) used primarily for glass-sealing applications in electronic devices.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
The following safety hazards caveat applies only to Section 13. 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: 31-Dec-2004
• ICS: 77.120.40 - Nickel, chromium and their alloys
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F31-94(1999) - Standard Specification for 42% Nickel-6% Chromium-Iron Sealing Alloy
• Effective Date: 01-Jan-2005
• Replaced By: ASTM F31-05(2010) - Standard Specification for 42% Nickel-6% Chromium-Iron Sealing Alloy
• Effective Date: 01-Oct-2010
• Referred By: ASTM F375-20 - Standard Specification for Integrated Circuit Lead Frame Material (Withdrawn 2023)
• Effective Date: 01-Jan-2005
• Referred By: ASTM F144-80(2019) - Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
• Effective Date: 01-Jan-2005
• Referred By: ASTM F140-98(2020) - Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
• Effective Date: 01-Jan-2005
• Referred By: ASTM F14-80(2019) - Standard Practice for Making and Testing Reference Glass-Metal Bead-Seal
• Effective Date: 01-Jan-2005

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: F31 – 05
Standard Specification for
1
42 % Nickel-6 % Chromium-Iron Sealing Alloy
ThisstandardisissuedunderthefixeddesignationF31;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Ordering Information
1.1 Thisspecificationcoversaniron-nickel-chromiumalloy 3.1 Ordersformaterialunderthisspecificationshallinclude
(UNSK94760)usedprimarilyforglass-sealingapplicationsin the following information:
electronic devices. 3.1.1 Size,
1.2 Thevaluesstatedininch-poundunitsaretoberegarded 3.1.2 Temper (Section 6),
as the standard. The values given in parentheses are for 3.1.3 Surface finish (Section 8),
information only. 3.1.4 Marking and packaging (Section 13), and
1.3 The following safety hazards caveat applies only to 3.1.5 Certification if required.
Section13.Thisstandarddoesnotpurporttoaddressallofthe
4. Chemical Composition
safety concerns, if any, associated with its use. It is the
4.1 The material shall conform to the requirements ofTable
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 1 as to chemical composition.
bility of regulatory limitations prior to use.
TABLE 1 Chemical Composition
2. Referenced Documents
Element Composition, %
2
2.1 ASTM Standards:
Nickel, nominal 42.0
E18 Test Methods for Rockwell Hardness of Metallic Ma-
Chromium, nominal 5.6
Carbon, max 0.07
terials
Manganese, max 0.25
E29 Practice for Using Significant Digits in Test Data to
Phosphorus, max 0.025
Determine Conformance with Specifications
Sulfur, max 0.025
Silicon, max 0.30
E38 Methods for Chemical Analysis of Nickel-Chromium
3 Aluminum, max 0.20
and Nickel-Chromium-Iron Alloys
Iron remainder
E112 Test Methods for Determining Average Grain Size
E228 Test Method for Linear Thermal Expansion of Solid
Materials With a Push-Rod Dilatometer
NOTE 1—The major constituents of this alloy may be adjusted by the
F14 PracticeforMakingandTestingReferenceGlass-Metal
manufacturer so that the alloy meets the requirement for thermal expan-
Bead-Seal
sion.
F140 PracticeforMakingReferenceGlass-MetalButtSeals
5. Chemical Analysis
and Testing for Expansion Characteristics by Polarimetric
Methods
5.1 Chemical analysis shall be made, when desired, in
F144 PracticeforMakingReferenceGlass-MetalSandwich
accordance with Methods E38.
Seal and Testing for Expansion Characteristics by Polari-
6. Surface Lubricants
metric Methods
6.1 Alllubricantsusedduringcold-workingoperationssuch
1
as drawing, rolling, or spinning, shall be capable of being
This specification is under the jurisdiction of ASTM Committee F01 on
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
removed readily by any of the common organic degreasing
Materials.
solvents.
Current edition approved Jan. 1, 2005. Published January 2005. Originally
approved in 1963 as F31–63T. Last previous edition approved in 1999 as
7. Temper
´1
F31–94(1999) . DOI: 10.1520/F0031-05.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1 The desired temper of the material shall be specified on
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
the purchase order. Unless otherwise specified, wire, rod, and
Standards volume information, refer to the standard’s Document Summary page on
tubing shall be given a final bright anneal by the manufacturer.
the ASTM website.
3
Discontinued; see 1988 Annual Book of ASTM Standards, Vol 03.05. Strip and sheet shall be annealed properly to develop drawing
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F31–05
TABLE 2 Permissible Variations in Thickness of Cold-Rolled Strip
3
NOTE 1— Measurement shall be made at least ⁄8 in. (9.5 mm) from the edge of strip over 1-in. (25.4 mm) wide.
Specified Thickness Permissible Variations in Thickness for Width Given, 6
(Under 76 Over 3 to 6 (76to150 Over 6 to 12 (150 to 300 Over 12 to 16 (300 to 400
in. (mm) Under 3 in.
mm) in. mm) in. mm) in. mm)
0.160 to 0.100, incl (4.06 to 2.54) 0.002 (0.05) 0.003 (0.076) 0.004 (0.10) 0.004 (0.10)
0.099 to 0.069, incl (2.51 to 1.75) 0.002 (0.05) 0.003 (0.076) 0.003 (0.076) 0.004 (0.10)
0.068 to 0.050, incl (1.73 to 1.27) 0.002 (0.05) 0.003 (0.076) 0.003 (0.076) 0.003 (0.076)
0.049 to 0.035, incl (1.24 to 0.89) 0.002 (0.05) 0.0025 (0.064) 0.003 (0.076) 0.003 (0.076)
0.034 to 0.029, incl (0.86 to 0.74) 0.0015 (0.038) 0.002 (0.05) 0.0025 (0.064) 0.0025 (0.064)
0.028 to 0.026, incl (0.71 to 0.66) 0.0015 (0.038) 0.0015 (0.038) 0.002 (0.05) 0.002 (0.05)
...