ASTM B774/B774M-21

Standard Specification for Low Melting Point Alloys and Solders

ABSTRACT
This specification covers low-melting point metal alloys and soldiers, including bismuth-tin, bismuth-lead, bismuth-tin-lead, bismuth-tin-lead-cadmium, bismuth-tin-lead-indium-cadmium, bismuth-tin-lead-indium, indium-lead, indium-lead-silver, and indium-tin joining together two or more metals at temperatures below their melting points; blocking for support and removable borders; radiation shielding; fusible plugs; fuses; tube bending; and punch setting. This specification shall include those alloys having liquidus temperature not exceeding the melting point of the tin lead eutectic, and alloys in the form of solid bars, ingots, powder and special forms, and in the form of solid ribbon and wire. The composition of the alloys shall conform to the chemical requirements for bismuth, lead, tin, cadmium, indium, silver, copper, antimony, and zinc. Alloys shall be tested and shall conform to specified values for alloy freezing point, and powder mesh size.
SCOPE
1.1 This specification covers low-melting point metal alloys and solders, including bismuth-tin, bismuth-lead, bismuth-tin-lead, bismuth-tin-lead-cadmium, bismuth-tin-lead-indium-cadmium, bismuth-tin-lead-indium, indium-lead, and indium-lead-silver, and indium-tin joining together two or more metals at temperatures below their melting points; blocking for support and removable borders; radiation shielding; fusible plugs; fuses; tube bending; and punch setting.  
1.1.1 This specification shall include those alloys having a liquidus temperature not exceeding 361 °F [183 °C], the melting point of the tin lead eutectic.  
1.1.2 This specification includes low-melting point alloys in the form of solid bars, ingots, powder and special forms, and in the form of solid ribbon and wire.  
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Mar-2021
• ICS: 77.120.01 - Non-ferrous metals in general
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.02 - Refined Lead, Tin, Antimony, and Their Alloys

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B774/B774M −21
Standard Specification for
1
Low Melting Point Alloys and Solders
This standard is issued under the fixed designation B774/B774M; 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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers low-melting point metal alloys
E55 Practice for Sampling Wrought Nonferrous Metals and
and solders, including bismuth-tin, bismuth-lead, bismuth-tin-
Alloys for Determination of Chemical Composition
lead, bismuth-tin-lead-cadmium, bismuth-tin-lead-indium-
E88 Practice for Sampling Nonferrous Metals and Alloys in
cadmium, bismuth-tin-lead-indium, indium-lead, and indium-
Cast Form for Determination of Chemical Composition
lead-silver, and indium-tin joining together two or more metals
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at temperatures below their melting points; blocking for 2.2 Military Standard:
support and removable borders; radiation shielding; fusible MIL-STD 129 Marking for Shipment and Storage
3
plugs; fuses; tube bending; and punch setting.
2.3 Federal Standard:
1.1.1 This specification shall include those alloys having a Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
liquidus temperature not exceeding 361 °F [183 °C], the melt-
3. Terminology
ing point of the tin lead eutectic.
1.1.2 This specification includes low-melting point alloys in
3.1 Definitions:
the form of solid bars, ingots, powder and special forms, and in
3.1.1 producer, n—the primary manufacturer of the mate-
the form of solid ribbon and wire.
rial.
3.1.2 supplier, n—the seller of the material to the purchaser
1.2 The values stated in either inch-pound units or SI units
(may or may not be the producer).
are to be regarded separately as standard. Within the text, SI
units are shown in brackets. The values stated in each system
3.2 Definitions of Terms Specific to This Standard:
may not be exact equivalents; therefore, each system shall be
3.2.1 liquidus, n—the lowest temperature at which an alloy
used independently of the other. Combining values from the
is fully transformed from a solid to a liquid.
two systems may result in non-conformance with the standard.
3.2.2 lot, n—the term “lot” as used in this specification shall
1.3 This standard does not purport to address all of the
be defined as follows: for solid alloy metal, a lot shall consist
safety concerns, if any, associated with its use. It is the of all the metal of the same time designation, produced from
responsibility of the user of this standard to become familiar
the same batch of raw materials under essentially the same
with all hazards including those identified in the appropriate conditions, and offered for inspection at one time.
Material Safety Data Sheet (MSDS) for this product/material
3.2.3 lot number, n—the term “lot number” as used in this
as provided by the manufacturer, to establish appropriate
specification refers to a numerical designation for a lot that is
safety, health, and environmental practices, and determine the
traceable to a date of manufacture.
applicability of regulatory limitations prior to use.
3.2.4 solidus, n—the highest temperature at which an alloy
1.4 This international standard was developed in accor-
is fully transformed from a liquid to a solid.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4. Classification
Development of International Standards, Guides and Recom-
4.1 Type Designation—The type designation shall use the
mendations issued by the World Trade Organization Technical
following symbols to properly identify the material:
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction of ASTM Committee B02 on contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
B02.02 on Refined Lead, Tin, Antimony, and Their Alloys. the ASTM website.
3
Current edition approved April 1, 2021. Published May 2021. Originally Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
approved in 1987. Last previous edition approved in 2014 as B774 – 00 (2014). Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
DOI: 10.1520/B0774_B0774M-21. dodssp.daps.dla.mil.
*A Summary of Ch
...

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: B774 − 00 (Reapproved 2014) B774/B774M − 21
Standard Specification for
1
Low Melting Point Alloys and Solders
This standard is issued under the fixed designation B774;B774/B774M; 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 Scope*
1.1 This specification covers low-melting point metal alloys and solders, including bismuth-tin, bismuth-lead, bismuth-tin-lead,
bismuth-tin-lead-cadmium, bismuth-tin-lead-indium-cadmium, bismuth-tin-lead-indium, indium-lead, and indium-lead-silver, and
indium-tin joining together two or more metals at temperatures below their melting points; blocking for support and removable
borders; radiation shielding; fusible plugs; fuses; tube bending; and punch setting.
1.1.1 This specification shall include those alloys having a liquidus temperature not exceeding 361°F (183°C),361 °F [183 °C], the
melting point of the tin lead eutectic.
1.1.2 This specification includes low-melting point alloys in the form of solid bars, ingots, powder and special forms, and in the
form of solid ribbon and wire.
1.2 The values stated in either inch-pound units or SI 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 separately as standard. Within
the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall
be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 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 become familiar with all hazards including those identified in the appropriate Material Safety Data
Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and
healthenvironmental practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
3
2.2 Military Standard:
MIL-STD 129 Marking for Shipment and Storage
1
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.02 on Refined
Lead, Tin, Antimony, and Their Alloys.
Current edition approved Oct. 1, 2014April 1, 2021. Published October 2014May 2021. Originally approved in 1987. Last previous edition approved in 20102014 as
B774B774 – 00 (2014). – 00 (2010). DOI: 10.1520/B0774-00R14.10.1520/B0774_B0774M-21.
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.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil.
*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
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B774/B774M − 21
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2.3 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Terminology
3.1 Definitions:
3.1.1 producer, n—the primary manufacturer of the material.
3.1.2 supplier, n—the seller of the material to the purchaser (may or may not be the producer).
3.2 Definitions of Terms Specific to This Standard:
3.2.1 liquidus, n—the lowest temperature at which an alloy is fully transformed from a solid to a liquid.
3.2.2 lot, n—the term “lot” as used in this specification sha
...