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Rubber Low Temperature Brittleness Impact Tester

Rubber Low Temperature Brittleness Impact Tester

Model: UT2064 ASTM D2137 ASTM D746; ISO 812; ISO 974

UT2064 Rubber low-temperature brittleness testing machine is to determine the highest temperature of vulcanized rubber under specified conditions when the sample is damaged by impact, that is, the brittle temperature, which can be used by non-rigid plastics and other elastic materials under low temperature conditions for comparative identification. It can determine the brittle temperature and low temperature performance of vulcanized rubber of different rubber materials or different formulations. Therefore, it is indispensable in terms of quality inspection of scientific research materials and their products, and control of production processes.


This instrument is designed according to ISO 974 plastic impact embrittlement temperature test method, ISO 812 international standard for determination of low-temperature brittleness of vulcanized rubber (single sample method), and is the latest developed compressor refrigeration equipment.

General Introduction

UT2064 Rubber low-temperature brittleness testing machine is to determine the highest temperature of vulcanized rubber under specified conditions when the sample is damaged by impact, that is, the brittle temperature, which can be used by non-rigid plastics and other elastic materials under low temperature conditions for comparative identification. It can determine the brittle temperature and low temperature performance of vulcanized rubber of different rubber materials or different formulations. Therefore, it is indispensable in terms of quality inspection of scientific research materials and their products, and control of production processes.


This instrument is designed according to ISO 974 plastic impact embrittlement temperature test method, ISO 812 international standard for determination of low-temperature brittleness of vulcanized rubber (single sample method), and is the latest developed compressor refrigeration equipment.

Rubber Low Temperature Brittleness Impact Tester

This equipment adopts cascade compressor refrigeration technology, using the principle of heat balance and circulating stirring to achieve automatic uniform cooling and constant temperature of the sample, which can fully meet the temperature control indicators stipulated by the national standard GB/T229-94.  ISO 812; ISO 974. ASTM D 2137,ASTM D746


Key Features

  • Structure principle
  • References Standard
  • Method A
  • Method B
  • Type of motion

1. Lifting clamp: The lifting clamp is composed of a cylinder with a clamp and a cylinder block. The distance from the impact part of the specimen to the lower end of the gripper is 11.0±0.5mm.

2. Impact device: The impact device is composed of an impact device and an impact cylinder.

3. Impactor: The weight of the impactor is 200±20g, and its working stroke is 40±1mm. When the impact cylinder is in the reset state, the distance from the end of the impactor to the specimen is 25±1mm.

4. Refrigeration medium: compressor refrigeration.

ISO 812:2017(en)

Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness

ISO 974:2000

Plastics — Determination of the brittleness temperature by impact

ASTM D2137-11(2018) 

Standard Test Methods for Rubber Property—Brittleness Point of Flexible Polymers and Coated Fabrics

ASTM D746-24 

Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact



Rubber Low Temperature Brittleness Impact Tester


Rubber Low Temperature Brittleness Impact Tester

Type of Impact Motion:  The type of impact motion provided by the machine follow the A Strait-line motion, , with reference to the image from ISO 812 standards shared below.

Rubber Low Temperature Brittleness Impact Tester

Main parameters

ModelUT2064
Temperature control range    -70°C (compressor refrigeration)
Cooling speed           0°C~-20°C about 1.2°C/min-20°C~-30°C, about 1.0°C/min-30°C~-60°C, about   0.7°C/min -60°C~-70°C, about 0.5°C/min
After constant temperature, the   temperature fluctuation within 5min of the test<±1 °C
Impact speed2m/s±0.2m/s
Sample numbersMax. 10 pcs   sample in one test
Option A1, For Rubber
a) punch radius1.6±0.1mm
b) the gap between the impact head and the specimen holder6.4±0.3mm mm
c) The distance between the centerline of the impact head and the   specimen holder8±0.3mm
Option A2, For Plastic
   Option A2.1,  Method A
a) punch radius1.6±0.1mm
b) jaw radius4.0±0.1mm
c) The gap between the punch centerline and the clamp3.6±0.1mm
d) The gap between the outside of the punch and the clamp2.0±0.1mm
  Option A2.2,  Method B
a) punch radius1.6±0.1mm
b) The gap between the punch centerline and the clamp7.87±0.25mm
c) The gap between the outside of the punch and the clamp6.35±0.25
Maximum dimensions720×700×1380mm   (length× height × width)
Cold room size200×140×100mm
Cooling medium99.7% ethanol   or other antifreeze
Stirring motor Power 15W
Working power supply220V~240V,   50Hz 2Kw


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Beijing United Test Co., Ltd.