Tensile Strength Test / Tensile Pull Test
Tensile testing measures a material’s response to a controlled tension until failure. The process can be used to identify the strength of materials as well as to validate seal strength.
Tensile Strength Test
Tensile testing measures a material’s response to a controlled tension until failure. The process can be used to identify the strength of materials as well as to validate seal strength.
The tensile test is a common test of the mechanical properties of a material. It involves applying a tensile load, also known as a tension test, to the material and measuring the reaction of the test specimen. Tensile tests assess how strong a material is recording the Yield Strength, Ultimate Strength, Elongation, Young’s Modulus, and Poisson’s ratio.
Seal strength testing is the process used to measure the force required to pull apart two bonded surfaces. Testing is performed for several reasons, including material selection, heat sealer validation, and shelf life validation. It is often used in the medical device industry to measure and quantify the strength of seals on medical products packaged in pouches or trays.
Why is a tensile strength test important?
Tensile strength tests can help manufacturers learn more about the elastic limits of a material or a formed product. Tensile testing can be applied to many different materials such as metal, plastics, and adhesives. With this information, manufacturers can make more informed material choices, provide proof of concept for products, and compare material options to make the best possible selection.

Standards Used for Tensile Pull Testing
Our accredited lab facilities use the following standards to perform tensile pull testing:
- ASTM F88: Seal Strength of Flexible Barrier Materials
- ASTM D0638: Tensile Properties of Plastics
- ASTM D0882 Tensile Properties of Thin Plastic Sheeting
- ASTM D3330 Peel Adhesion of Pressure Sensitive Tape
What characteristics are evaluated in a Tensile Pull/Tension Test?
Tensile testing services generate an abundance of information about products and materials by testing a variety of characteristics, including:
- Yield Strength: Under stress, the yield strength is the point at which plastic deformation (permanent deformation) occurs.
- Ultimate Tensile Strength (UTS): The greatest stress to which a specimen is subjected during tensile testing is known as the UTS. Depending on whether the specimen is brittle, ductile, or has properties of both.
- Elongation: is the final length of the test specimen at failure.
What products and materials can be tested with tensile testing?
Anything that we can grip with the jaws of the machine or develop a fixture for we can conduct tensile testing on. Some examples are catheter wire, seat belt material, steel banding and glued foam blocks.
What is the tensile strength test process?
Material strength testing, often known as tensile or tension testing, entails applying an increasing load to a test sample until it fails. The procedure produces a stress/strain curve that depicts how the material reacts up to failure. Tensile test data is used to identify mechanical properties of materials and can provide the following information.
- Yield Strength
- Ultimate Tensile Strength (UTS)
- Strain hardeningElasticity
Accreditations:

Testing at WESTPAK has been accredited by A2LA to comply with ISO 17025.

WESTPAK testing labs are ISTA certified to perform a variety of tests.