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Rockwell hardness values are expressed as a combination of a hardness number and a scale symbol representing the indenter and the minor and major loads. The hardness number is expressed by the symbol HR and the scale designation. UNITEDTEST hardness testers are based on the same construction principle of the COMP series which are already well known for their economic, reliability and easy using.
Principle:
1. The indenter moves down into position on the part surface
2. A minor load is applied and a zero reference position is established
3. The major load is applied for a specified time period (dwell time) beyond zero
4. The major load is released leaving the minor load applied
The resulting Rockwell number represents the difference in depth from the zero reference position as a result of the application of the major load.
Model:
HRSS-150 Digital Dual Rockwell Hardness Tester
(Rockwell and superficial Rockwell hardness incorporated tester)
1), The selection of all hardness scales for Rockwell and superficial Rockwell; Total 18 kinds of testing methods, and testing force automatic selection;
2), Dwell time can adjust, Reset and cancel function
3), Review the testing data (max. 24 times).
4), Data processing and output by micro-printer,
5), RS232 serial communication is supplied to clients for the functional extension.
6), Various hardness values comparison and exchange.
7), 5.2 inch large LCD screen
Model | HRSS-150 | |
Methods | Rockwell | Superficial Rockwell |
Hardness scales | A,B,C,D,E,F,G,H,K,L,M,P,R,S,C | 15N,30N,45N,15T,30T,45T,15W,30W, 45W,15X,30X,45X,15Y,30Y,45Y |
Initial testing force | 98.07N (10Kg) | 29.42N (3Kg) |
Total test force | 588.4N(60Kg), 980.7N(100Kg), 1471N(150Kg) | 147.1N(15Kg), 294.2N(30Kg), 441.3N(45Kg) |
Duration time control | 0-60S adjustable | |
Hardness value Resolution | 0.1 Rockwell hardness unit | |
LCD display | Menu selection, hardness value displaying, data statistics, storage, parameter setting etc., | |
Calculation | Test times, average value, Max. value, Min. value, repeatability; with alarm function and can set the upper and lower limited value. | |
Data output | Built in printer and RS232 interface | |
Scales exchange | Brinell, Vicker’s Rockwell, Superficial Rockwell etc. | |
Max. height of specimen | 220mm | |
Max. width of specimen | 130mm | |
Dimensions | 520×280×700mm | |
Weight | 65Kg | |
Power supply | AC 220V, 50-60HZ | |
Standard Accessories | Diamond Rockwell hardness indenter, Standard Rockwell hardness block,∮1.5875mm hard alloy ball indenter, Testing table (big, medium, “V”), Weight (1, 2, 3, 4, 5), RS232 cable, Power cord, etc. |
Diamond Rockwell hardness indenter,
Standard Rockwell hardness block,
∮1.5875mm hard alloy ball indenter,
Testing table (big, medium, “V”),
Weight (1, 2, 3, 4, 5),
RS232 cable,
Power cord, etc
ASTM E18 “Standard Test Methods for Rockwell Hardness of Metallic Materials”
ISO 6508 “Metallic materials — Rockwell hardness test”
ASTM D785 “Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials”