Overview
ISO 14317:2015 is an international standard developed by the International Organization for Standardization (ISO) that specifies a precise method for determining the compressive yield strength of sintered metal materials, excluding hardmetals. This standard is essential for assessing the mechanical properties of sintered metals, whether or not they have undergone post-sintering heat treatment, sizing, or coining processes.
The compressive yield strength is a critical property that defines the stress level at which a material begins to deform plastically under compressive load. Accurate measurement of this property ensures quality control, material characterization, and reliable engineering design in powder metallurgy and related industries.
Key Topics
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Scope and Applicability
ISO 14317:2015 applies specifically to sintered metal materials, excluding hardmetals, regardless of heat treatment or post-sintering processing such as sizing or coining. This flexibility makes it widely applicable within the sintered metal manufacturing sector.
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Test Methodology
The standard outlines a rigorous compression test procedure using calibrated testing machines compliant with ISO 7500-1. Test specimens are compressed axially, and strain is measured with high-precision extensometers ensuring errors remain below strict limits, guaranteeing reliable and repeatable results.
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Test Specimens
Test pieces are cylindrical with a diameter of 9.0 mm and length of 27.0 mm (L/D ratio 3:1), machined to exact tolerances from compacted specimens. This standardization ensures consistency in testing and accuracy in determining the compressive yield strength.
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Procedure
The specimen is placed between polished, parallel anvil faces and subjected to compression at a controlled loading rate not exceeding 0.05 mm/min. The stress-strain curve is analyzed to identify the yield point at 0.1% strain using the offset method.
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Results Expression
The compressive yield strength is calculated by dividing the yield load by the cross-sectional area of the specimen and reported in megapascals (MPa). The method ensures consistent interpretation of results according to internationally recognized guidelines.
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Reporting Requirements
The standard mandates comprehensive documentation in the test report including sample identification, processing conditions, test results, optional procedures followed, and any factors influencing the test outcomes.
Applications
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Quality Control for Sintered Metals
Manufacturers of sintered metal components rely on ISO 14317:2015 to verify compressive yield strength, ensuring products meet design and performance criteria in automotive, aerospace, and industrial machinery sectors.
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Material Development and Research
Researchers and material scientists use this standard to compare the mechanical properties of novel sintered materials, optimizing processing parameters such as compaction and heat treatment.
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Engineering Design and Component Specification
Engineers apply compressive yield strength data obtained via ISO 14317 testing to select appropriate materials for load-bearing parts and structural components fabricated from sintered metal powders.
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Standardization in Powder Metallurgy
The method facilitates harmonization in the global powder metallurgy community by providing a common test framework, enhancing reliability and comparison across international suppliers and markets.
Related Standards
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ISO 7500-1: Metallic materials - Verification of static uniaxial testing machines
This standard is referenced within ISO 14317:2015 for calibration and verification of compression testing machines, ensuring accuracy in force measurement.
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ISO 5754: Sintered metal materials, excluding hardmetals - Unnotched impact test piece
Provides the basis for dimensional specifications of test specimens used in ISO 14317, promoting consistency in sample preparation.
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Additional ISO Standards on Powder Metallurgy
Standards within ISO Technical Committee ISO/TC 119, particularly Subcommittee SC 3, cover a broad range of sampling and testing methods applicable to sintered metal materials.
Keywords: ISO 14317, compressive yield strength, sintered metal materials, powder metallurgy standards, mechanical testing ISO, sintered metals compression test, metal material standards, quality control sintered metals, sintered metal strength measurement.
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