IEC 61189-11:2013 Overview
IEC 61189-11:2013 is an international standard published by the International Electrotechnical Commission (IEC) that specifies test methods for measuring the melting temperature or melting temperature ranges of solder alloys. These solder alloys are critical materials widely used in wiring electrical equipment, assembling printed boards, electronic interconnections, communication devices, and other electrical apparatuses. Accurate determination of melting points ensures quality control and reliability in electronics manufacturing and assembly.
This part of the IEC 61189 series focuses specifically on two proven measurement methods: Differential Scanning Calorimetry (DSC) and the Cooling Curve of Molten Solder. Both methods help characterize solder alloys’ melting behavior, assisting manufacturers and engineers in selecting appropriate solder materials that meet performance requirements.
Key Topics Covered
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Scope and Purpose
Defines methods for measuring melting temperature ranges (solidus and liquidus) of solder alloys used in electrical and communication equipment assembly.
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Terms and Definitions
Clarifies essential terms related to melting temperature ranges, including:
- Solidus temperature – temperature when melting starts or solidification ends
- Liquidus temperature – temperature when melting ends or solidification starts
- Melting temperature ranges – the total range between solidus and liquidus temperatures
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Measurement Methods
- Method A: Differential Scanning Calorimetry (DSC)
Uses thermal analysis to record heat flow changes during controlled heating to identify melting points.
Requires equipment such as DSC instruments, high-resolution balances, inert gas atmospheres, and alumina powder as reference.
- Method B: Cooling Curve of Molten Solder
Involves heating solder in an electric furnace and recording temperature changes with thermocouples as the solder cools and solidifies.
Demands precise temperature measurement instruments and appropriate data recording tools.
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Test Equipment Requirements
Describes specifications for balances, furnaces, thermocouples, DSC instruments, pans, and inert gases necessary to perform accurate measurements.
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Calibration and Procedure Details
Provides guidelines for equipment calibration, testing conditions, and step-by-step measurement procedures to ensure repeatability and reliability.
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Reporting and Examples
Includes annexes with test report formats, example results for common solder alloys, and graphical interpretations of DSC and cooling curves.
Practical Applications
IEC 61189-11:2013 is indispensable for professionals involved in:
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Electronics Assembly and Manufacturing
Precisely measuring melting temperature ensures correct solder alloy selection, preventing defects in solder joints.
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Quality Assurance Laboratories
Standardized test methods support compliance verification and material certification for solder alloys used in printed circuit boards (PCBs) and interconnection assemblies.
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R&D in Solder Materials
Melting point data is crucial when developing new solder compositions with tailored melting ranges and mechanical properties.
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Communication Equipment Production
Reliable soldering techniques contribute to device longevity, performance stability, and regulatory compliance across telecommunications hardware.
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Electrical Equipment Fabrication
Controls over solder alloy performance directly impact electrical connectivity reliability and safety in various apparatus.
Related Standards
For comprehensive testing and quality control of solder alloys and electronic assembly materials, IEC 61189-11:2013 should be used alongside these complementary standards:
- IEC 60194 – Printed Board Design, Manufacture and Assembly – Terms and Definitions
- IEC 61189-3 – Test Methods for Electrical Materials, Printed Boards, and Interconnection Structures – Part 3 (Interconnection Structures Testing)
- IEC 61190-1-3 – Attachment Materials for Electronic Assembly – Requirements for Electronic Grade Solder Alloys and Solders
- ISO 9453 – Soft Solder Alloys – Chemical Composition and Forms
- ISO 11357-1 – Plastics – Differential Scanning Calorimetry (DSC) – General Principles
Utilization of these interconnected standards provides a robust framework for testing, material specifications, and terminology harmonization in electrical and electronic manufacturing sectors.
Summary
IEC 61189-11:2013 defines internationally accepted test methods for accurately measuring melting temperature ranges of solder alloys used in electrical and communication equipment assembly. The standard’s guidance on DSC and cooling curve methods enables manufacturers, testers, and developers to perform reliable and repeatable measurements ensuring quality and performance in solder materials. Conformance to this standard supports industry-wide enhancement of electronics manufacturing processes and interconnection reliability, making it essential for quality control, materials research, and regulatory compliance in electro-assembly environments.
Keywords: IEC 61189-11, solder alloy melting temperature, melting temperature range, solidus temperature, liquidus temperature, differential scanning calorimetry, DSC, cooling curve, electrical materials testing, printed boards, interconnection assembly standards, electronics manufacturing quality assurance.
Open preview (PDF)Test methods for electrical materials, printed boards and other interconnection structures and assemblies - Part 11: Measurement of melting temperature or melting temperature ranges of solder alloys
