| Type: | Brinell Hardness Tester |
|---|---|
| Measuring Range: | HB |
| Application: | Metal |
| Standard: | ISO, ASTM |
| Testing Range: | (8~650) Hbw |
| Auto Hardness Conversion: | Hr, Hv, HK, etc |
| Customization: |
|---|
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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.
| Specifications: | |||||
| Product Name | Digital Low Load Brinell Hardness | ||||
| Model | SHB-62.5 | ||||
| Code# | 831-141 | ||||
| Testing Force | 49.03N,61.29N,98.07N,153.2N,294.2N,306.5N,612.9N | ||||
| 5Kgf, 6.25Kgf, 10Kgf, 15.625Kgf, 30Kgf,31.25Kgf,62.5Kgf | |||||
| Testing Range | (8~650) HBW | ||||
| Loading Control | Automatic(loading, dwell, unloading) | ||||
| Lens &Indenter Switch | Auto-Turret | ||||
| Magnification of Objective | Observation:5x/10x & Measurement: 5x/10x | ||||
| Magnification of Eyepiece | 10x Digital Eyepiece | ||||
| Measuring Range | 0.6~1.5mm | ||||
| Resolution | 0.5μm(5x) 0.25μm(10x) | ||||
| Dwell Time | 0~95s | ||||
| Hardness Value | Manual Measuring, Auto reading;Auto Measuring Auto Reading | ||||
| Max of Height of Specimen | 170mm | ||||
| Instrument Throat | 130mm | ||||
| Power Supply | AC220V/50Hz; 110V/60Hz | ||||
| Instrument Dimension | 535x225x580mm | ||||
| Gross/Net Weight | 75kg / 50kg | ||||
| Accuracy | 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 | ≤± 2.5% | ≤ 3.0% | |||
| HBW> 225 | ≤± 2.0% | ≤ 2.5% | |||
| Brinell Scales | |||||
| Diameter of ball Indenter | Brinell Scales | ||||
| 5mm | HBW5/62.5 | ||||
| 2.5mm | HBW2.5/62.5 | HBW2.5/31.25 | HBW2.5/15.625 | HBW2.5/6.25 | |
| 1mm | HBW1/30 | HBW1/10 | HBW1/5 | ||
| Standard Delivery: | |||||
| Standard Delivery | Code# | Standard Delivery | Code# | Standard Delivery | Code# |
| Main Body | 831-141 | Ø5mm Ball Indenter | 831-421 | Ø200mm Flat Anvil | 831-551 |
| 10x Digital Microscope | 831-241 | Ø2.5mm Ball Indenter | 831-431 | Ø 40mm V-shape Anvil | 831-521 |
| Objectives 5x | 831-301 | Ø1mm Ball Indenter | 831-401 | Level Screw | 831-931 |
| Objectives 10x | 831-311 | Hardness Block HBW/30/1 | 831-661 | Power Cable | 831-801 |
| Accessories Box | 831-901 | Hardness Block HBW/62.5/2.5 | 831-651 | Instrument Manual | SHB-62.5 |
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