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Product Code : 16 Brand Name :HMOR 422 D-3

Product Specification

Refractory Testing Apparatus

The modulus of rupture (MOR) is an important variable in the characterization of refractory materials. Determination of the maximum load at high temperatures is a property which, along with other thermophysical properties, is an important parameter for quality control and development of furnace linings.

The modulus of rupture is defined as the maximum stress a rectangular test piece of specific dimensions can withstand in a 3-point bending test until it breaks, expressed in N/mm2 or MPa.

The International Standard Test Method is described in ISO 5013;
test piece dimensions: 150 mm x 25 mm x 25 mm.

For determination of the modulus of rupture of refractories up to a temperature of 1500^oC and a maximum load of 5000 N (60 N/mm2), NETZSCH offers the model 422 D/3. This model is designed for continuous testing with a 3-point bending device.
With optional devices for load and deformation measurement and/or constant deformation rate, additional information about the limits of elasticity and crack propagation in ceramic test pieces can be obtained.

The HMOR model 422 E/4 is used to test small single test pieces in accordance with the 4-point load method with a distance between support edges of 40 mm. Inserting the test piece is simplified by the user-friendly split shell furnace (maximum temperature 1450^oC). This unit uses a differential measuring system like that used by the RUL/CIC 421 for accurate determination of the test piece deformation.

Technical Specifications

Temperature range: RT ...1500^oC (1450^oC at HMOR 422 E/4)
Heating elements: SiC
Heating rates: Bending support: SiC
Load: 1 N ... 5000 N (in 4 speeds 1.25 N/s ... 125 N/s)
Bending measuring range: 10000 ÃŽÂ¼m (2500 Ã‚Âµm at 422 E/4)
Temperature measurement: type S thermocouples
Sample dimensions: 150 mm x 25 mm x 25 mm (45 mm x 4.5 mm x 3.5 mm at 422 E/4)
Bending mode: 3-point (4-point at 422 E/4)
Atmospheres: air, static (protective gas inlet as special attachment)
Constant deformation: 10 Ã‚Âµm/min ... 2000 ÃŽÂ¼m/min (optional only with 422 D/3)

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