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What is a Tensile Tester?

Tensile Testers fom 5 kN up to 2,500 kN

A tensile tester, also known as a pull tester or universal testing machine (UTM), is an electromechanical test system that applies a tensile force (pull force) to a material to determine its strength and deformation behavior until break.

Tensile Tester Components

A typical tensile tester consists of a load cell, crosshead, grips, extensometer, electronics, and a drive system. It is controlled by testing software used to define machine and safety settings, as well as store test parameters defined by testing standards such as ASTM and ISO. 

What is a tensile test?

A tensile test, or tension test, is a test used to determine how a material reacts to an applied (pulling) force. It characterizes yield strength, tensile strength, strain at break and other material properties such as modulus of elasticity (Young’s modulus) and deformation (Poisson’s ratio). The data obtained can be plotted on a graph to produce a stress/strain curve.

This stress strain curve shows a curve with a high level of work-hardening (1) and with a low level of work-hardening (2) after the yield point.

Types of tensile testers

Common standards for tensile testing

ASTM and ISO are two common standards used in materials testing. Here are some of the most common for tensile testing:

Performing tensile test to ASTM E8 for metals

Metal tensile test to ISO 6892-1 Method A and ASTM E8 with AllroundLine and ProLine tensile testers.

Performing a tensile test to ASTM D638 for plastics

Tensile tests on plastics to ASTM D638 using a ProLine tensile tester with makroXtens extensometer

Performing a tensile test to ASTM D412 for elastomers

Tensile tests on elastomers with very high strain according ISO 37, ASTM D 412. Using a ZwickRoell ProLine tensile tester with an optical extensometer "lightXtens".