Tensile Modulus

This test determines the tensile strength and elongation at break of material specimens as specified in ASTM D882. Specimens are pulled at a controlled rate in a universal testing machine until failure occurs, and the force and extension are recorded throughout the test.Tensile strength and elongation are fundamental mechanical properties that indicate the material’s ability […] Read more

Relative Resistance to Vented Water-Tree Growth in Solid Dielectric Insulating Materials

ASTM D6097 covers the relative resistance to vented water-tree growth in solid translucent thermoplastic or crosslinked electrical insulating materials, especially applicable to extruded polymeric insulation used in medium-voltage cables.The test method subjects insulation specimens to simultaneous electrical stress and moisture exposure over extended periods. Water trees are microscopic damage patterns that grow from surface defects […] Read more

Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between -30°C and 30°C with a Vitreous Silica Dilatometer

This test evaluates the standard test method for coefficient of linear thermal expansion of plastics between -30°c and 30°c with a vitreous silica dilatometer of material specimens as specified in ASTM D696. The test is performed in accordance with the procedures defined in the standard to verify compliance with the applicable requirements.Test specimens are prepared […] Read more

Standard Test Method for Coefficient of Compressive Strength

This test evaluates the standard test method for coefficient of compressive strength of material specimens as specified in ASTM D695. The test is performed in accordance with the procedures defined in the standard to verify compliance with the applicable requirements.Test specimens are prepared and conditioned as specified, then subjected to the defined test procedure. Results […] Read more

Dielectric Testing of Wire and Cable Filling Compounts

ASTM D4872 covers the determination of dissipation factor, permittivity (dielectric constant), and AC volume resistivity of wire and cable filling compounds and related materials that are solid at room temperature but can be melted at elevated temperatures.A measured volume of melted sample is placed into a level preheated specimen dish, cooled, and primary/secondary electrodes are […] Read more

Insulation State of Sinter

ASTM D4591 defines conditions for the use of differential scanning calorimetry (DSC) with fluoropolymers including PTFE, PVDF, PCTFE, PVF and their copolymers. The standard specimen mass is 9-10 mg weighed to 0.01 mg accuracy with standard heating/cooling rates of 10°C/min.DSC analysis can: identify fluoropolymers by transition temperatures, compare crystalline content by measuring heat of fusion, […] Read more

Test Method for Peel Adhesion of Pressure-Sensitive Tape

This test evaluates the test method for peel adhesion of pressure-sensitive tape of material specimens as specified in ASTM D3330. The test is performed in accordance with the procedures defined in the standard to verify compliance with the applicable requirements.Test specimens are prepared and conditioned as specified, then subjected to the defined test procedure. Results […] Read more

Corrosion Potential – Procedure A (copper mirror)

Sections 87-89 of ASTM D2671 are part of the corrosion testing group (Sections 85-91) for heat-shrinkable tubing. These sections cover corrosion assessment and copper stability testing.The corrosion tests evaluate whether heat-shrinkable tubing materials cause degradation of copper conductors when in contact at elevated temperatures. Specimens are typically placed in contact with polished copper coupons and […] Read more

Specific Gravity

This test evaluates the specific gravity of material specimens as specified in ASTM D792. The test is performed in accordance with the procedures defined in the standard to verify compliance with the applicable requirements.Test specimens are prepared and conditioned as specified, then subjected to the defined test procedure. Results are compared against the acceptance criteria […] Read more

Brittleness Temperature

ASTM D746 covers the determination of the brittleness temperature of plastics and elastomers by impact testing. Specimens are secured to a holder, immersed in a cooled heat-transfer medium bath, and struck at a linear speed of 2000 ± 200 mm/s. After impact, specimens are examined for cracks or complete separation.The test establishes the temperature at […] Read more

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