SHB-3000H Innovative closed-loop technology, via a closed-loop control unit with a load cell.
SHB-3000H Fully automatic test cycle and loading application, greatly improves repeatability of test results.
SHB-3000H Equipped with special Brinell indention measure system which can measure the Brinell indention accurately, quickly, reliably.
SHB-3000H The directions for 0.102F/D2 ratios selecting according to the materials and hardness range can be showing on LCD.
SHB-3000H Indenter, loading, dwell time and other test information are showing clearly on LCD.
SHB-3000H Test load selection is controlled by keyboard and LCD screen.
SHB-3000H Whole weight of tester is 50% less than the traditional dead weights type tester.
Principle of Brinell Test
The Brinell hardness test method consists of indenting the test material with a 10 mm diameter hardened carbide ball subjected to a load of 3000 kg. For softer materials the load can be reduced to 1500 kg or 500 kg to avoid excessive indentation.
The full load is normally applied for 10 to 15 seconds in the case of iron and steel and for at least 30 seconds in the case of other metals. The diameter of the indentation left in the test material is measured with a low powered microscope. The Brinell harness number is calculated by dividing the load applied by the surface area of the indentation.
The diameter of the impression is the average of two readings at right angles and the use of a Brinell hardness number table can simplify the determination of the Brinell hardness. A well structured Brinell hardness number reveals the test conditions, and looks like this, "75 HB 10/500/30" which means that a Brinell Hardness of 75 was obtained using a 10mm diameter hardened steel with a 500 kilogram load applied for a period of 30 seconds.
On tests of extremely hard metals a tungsten carbide ball is substituted for the steel ball. Compared to the other hardness test methods, the Brinell ball makes the deepest and widest indentation, so the test averages the hardness over a wider amount of material, which will more accurately account for multiple grain structures and any irregularities in the uniformity of the material. This method is the best for achieving the bulk or macro-hardness of a material, particularly those materials with heterogeneous structures.
|Product Name||Digital Heigten Brinell Hardness Tester|
|Testing Force||62.5Kgf, 100Kgf, 125Kgf, 187.5Kgf, 250Kgf, |
|500Kgf, 750Kgf, 1000Kgf, 1500Kgf, 3000Kgf|
|612.9N, 980N, 1226N, 1839N, 2452N, |
|4900N, 7355N, 9800N, 14700N, 29400N|
|Testing Range||(8~650) HBW|
|Hardness Display||LCD Display|
|Magnification of Microscope||20x Mechanic Microscope|
|Max. Height Of Specimen||430mm|
|Output Data||RS 232/Printer|
|Auto Hardness Conversion||HR, HV, HK, etc|
|Dimension(LxWxH)||893 x720 x922mm|
|Execution Standard||ISO 6506 , ASTM E10 – 12 , JIS Z2243 , GB/T 231|
|Accuracy of Brinell Hardness Testing|
|Hardness Range||Max. Tolerance||Repetition|
|HBW≤ 125||≤± 3.5 %||≤ 3.5 %|
|125 < HBW≤225||≤± 2.5 %||≤ 3.0 %|
|HBW > 225||≤± 2.0 %||≤ 2.5 %|
|831-152||Instrument Main Body|
|831-232||20x Digital Microscope|
|831-602||Hardness Block HBW/3000/10|
|831-612||Hardness Block HBW/750/05|
|831-412||Ø10mm Ball Indenter|
|831-422||Ø5mm Ball Indenter|
|831-432||Ø2.5mm Ball Indenter|
|831-552||Ø 200mm Flat Anvil|
|831-502||Ø 60mm Flat Anvil|
|831-522||Ø 55mm V-shape Anvil|