Load Softening Temperature Tester

Published: 3/14/2025

High-temperature load softening tester for refractories, ceramics, and graphite to determine softening behavior under combined heat and load. Built to YB/T 370, GB/T 5989, and ISO 1893:1989 methods with configurable temperature ranges and loading options.

Product Description

The Load Softening Temperature Tester measures the temperature range over which refractory, ceramic, and graphite materials undergo noticeable plastic deformation when subjected to a specified compressive load during controlled heating. The instrument supports both non-differential heating methods per YB/T 370 as well as compliance with GB/T 5989 and ISO 1893:1989, offering multiple configurations to suit different sample sizes and loading requirements.

It features programmable heating with manual or automatic control, precise deformation measurement, and options for direct digital loading. An opening furnace structure facilitates quick replacement of upper and lower compression rods, while an independent loading system improves load accuracy. The system can connect to a computer for fully automatic control and report printing.

Technical Specifications

Parameter	Specification
Details	Heating temperature (max): 1650°C or 1750°C (two options) Usable temperature: 1600°C (for 1650°C furnace), 1700°C (for 1750°C furnace) Temperature control accuracy (heating segments): < ±2°C Heating rate: 0–20°C/min, user-settable Heating control: Manual or automatic program; ≥30 segments Deformation measurement range: 0–10 mm Deformation indication error: ≤0.03 mm Sample dimensions (option 1): Height 50 ±0.5 mm; Diameter 36 ±0.15 mm Sample dimensions (option 2): Height 50 ±0.5 mm; Diameter 50 ±0.35 mm Uniform temperature zone height: ≥75 mm Temperature uniformity across zone: ≤20°C Maximum power: 3.5–6 kW Applied stress (typical): 0.2 MPa, 0.1 MPa (others optional) Loading method: Direct compression with digital indication Load range: 100–1000 N Load resolution: 1 N Furnace structure: Opening design for easy replacement of compression rods Loading system: Independent, high-accuracy PC connectivity: Yes; supports full automatic control and report printing Test methods: Non-differential heating method; differential and non-differential options available

Parameter

Specification

Details

Heating temperature (max): 1650°C or 1750°C (two options) Usable temperature: 1600°C (for 1650°C furnace), 1700°C (for 1750°C furnace) Temperature control accuracy (heating segments): < ±2°C Heating rate: 0–20°C/min, user-settable Heating control: Manual or automatic program; ≥30 segments Deformation measurement range: 0–10 mm Deformation indication error: ≤0.03 mm Sample dimensions (option 1): Height 50 ±0.5 mm; Diameter 36 ±0.15 mm Sample dimensions (option 2): Height 50 ±0.5 mm; Diameter 50 ±0.35 mm Uniform temperature zone height: ≥75 mm Temperature uniformity across zone: ≤20°C Maximum power: 3.5–6 kW Applied stress (typical): 0.2 MPa, 0.1 MPa (others optional) Loading method: Direct compression with digital indication Load range: 100–1000 N Load resolution: 1 N Furnace structure: Opening design for easy replacement of compression rods Loading system: Independent, high-accuracy PC connectivity: Yes; supports full automatic control and report printing Test methods: Non-differential heating method; differential and non-differential options available

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