High-Temperature Tensile Testing Machine – STM-20 (2 t) (up to 200˚C)

Servo electrical operating mechanism with ball screws
Equipped for high-temperature tensile testing of polymer specimens (furnace, control system, interface, and grips) at temperatures up to 200˚C
Capable of performing high-temperature tensile tests to evaluate tensile strength of plastic and composite specimens under elevated temperatures
Additional capabilities: tensile, compression, cyclic, bending, peeling, tear, creep, and relaxation tests under ambient temperature in compliance with ASTM, DIN, EN, ISO, JIS, various grips and fixtures can be mounted
Precision load cell, capacity: 2000kgf, accuracy class: 0.5
A digital encoder for measuring the crosshead displacement (extension resolution 0.01 µm)
Equipped with AC servo motor and driver featuring a closed-loop control system
Fully computerized control through RS-232 and USB serial ports using DSP-based hardware technology without restriction in PC type
Powerful JADOO-Controller, windows-based software for defining high-temperature tensile, compression, creep, cyclic, and step tests. It generates unrestricted comprehensive reports and plots Force-Extension, Stress-Elongation, Force-Time, Extension-Time graphs
Real-time speed control from 0.001 to 1000 mm/min, supporting advanced control modes such as constant displacement rate, constant strain rate, constant force rate, constant stress rate, constant true strain rate, constant true stress rate (when JADOO software is available)
Compatible with low-capacity load cells to improve measurement accuracy
Quick installation of various fixtures and grips (tensile, compression, bending, peeling, …) using pin-type connections
Portable keyboard for convenient operation

STM-20 is equipped with temperature chamber for hot tensile testing with a servo-electric mechanism using ball screws and AC servo motor and driver. Force is measured by a 2-ton load cell, accuracy class 0.5 (max. error 0.5% of the reading from 2% to 100% of the load cell capacity) in compliance with ISO 7500 and EN 10002.

The system is equipped with a rectangular temperature chamber offering sufficient space for specimen mounting and a heating system that ensures uniform temperature distribution along both vertical and angular directions. The furnace operates at temperatures up to 200 ˚C, with each heating zone individually controlled via a digital controller. A thermocouple is provided for measuring both specimen temperature and chamber bulk temperature, the control system automatically compensates for temperature gradients between zones using real-time feedback from the specimen thermocouple (resolution of 0.1˚C). For ease of operation, the furnace is mounted on a sliding mechanism that allows it to be moved out of the testing area.

The machine features a displacement sensor without stroke limitation, providing 0.03 µm resolution in no load mode and a displacement measurement accuracy better than 0.05 mm at full stroke. The test speed is adjustable from 0.001 to 1000 mm/min. The system supports various low-capacity load cells to improve measurement accuracy, and automatically identifies the load cell and applies the corresponding settings.

High-temperature tensile testing can be conducted using the Windows-based JADOO software under rate control in two methods: constant force and constant stress, in accordance with the relevant standards.

Load Rate Control for all of machine instrument, Control (Force•, Stress•, Extension•, Strain•, … = cte)

Specialized high-temperature jaws for securely clamping polymer and metal specimens during tensile testing at max. temperature are available upon request

The remaining hardware and software capabilities of the machine are identical to those of the STM series (servo electric configuration)

STM-20 machines plot real-time stress-strain curves during tensile testing and automatically calculate key mechanical properties (yield stress, ultimate tensile strength, strain, plastic deformability, stiffness, elongation, …). They also compare high-temperature test results with those obtained at ambient conditions, making them suitable for use during production processes (such as hot forming, melting, and rolling), as well as in research and quality control of polymer components. Typical application areas include: