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Advantages

Wide measuring range. Based on the principle of Leeb hardness testing theory.

  • It can measure the Leeb hardness of all metallic materials.
  • Large screen LCD, showing all functions and parameters. With EL background light.
  • Seven impact devices are available for special application. Automatically identify the type of impact devices.
  • Test at any angle, even upside down.
  • Direct display of hardness scales HRB, HRC, HV, HB, HS, HL
  • Large memory could store 100 groups (Relative to average times 32~1 ) information including single measured value, mean value, impact direction, impact times, material and hardness scale etc.
  • Battery information showing the rest capacity of the battery.
  • User calibration function.
  • Software to connect to PC via RS232 port. Micro printer support.
  • Compact plastic case,suitable for use under poor working conditions
  • Continuous working period of no less than 100 hours with two alkaline batteries(AA size); Auto power off to save energy.
  • Outline dimensions:150×74×32 mm -Weight:245g

 

Main Application

 

  • Die cavity of molds
  • Bearings and other parts
  • Failure analysis of pressure vessel, steam generator and other equipment
  • Heavy work piece
  • The installed machinery and permanently assembled parts.
  • Testing surface of a small hollow space
  • Material identification in the warehouse of metallic materials
  • Rapid testing in large range and multi-measuring areas for large-scale work piece

 

Testing Range

Material Method Impact device
D/DC D+15 C G E
Steel and cast steel HRC 20~68.5 19.3~67.9 20.0~69.5 22.4~70.7 20.6~68.2
HRB 38.4~99.6 47.7~99.9 37.0~99.9
HRA 59.1~85.8 61.7~88.0
HB 127~651 80~638 80~683 90~646 83~663 81~646
HV 83~976 80~937 80~996 84~1042 80~950
HS 32.2~99.5 33.3~99.3 31.8~102.1 35.8~102.6 30.6~96.8
Cold work tool steel HRC 20.4~67.1 19.8~68.2 20.7~68.2 22.6~70.2
HV 80~898 80~935 100~941 82~1009
Stainless steel HRB 46.5~101.7
HB 85~655
HV 85~802
Grey cast iron HRC
HB 93~334 92~326
HV
Nodular cast iron HRC
HB 131~387 127~364
HV
Cast aluminium alloys HB 19~164 23~210 32~168
HRB 23.8~84.6 22.7~85.0 23.8~85.5
BRASS(copper-zinc alloys) HB 40~173
HRB 13.5~95.3
BRONZE(copper-aluminium/tin alloys) HB 60~290
Wrought copper alloys HB 45~315

 

Testing range in HLD

No. Material HLD Strength σb(MPa)
1 Mild steel 350~522 374~780
2 High-Carbon steel 500~710 737~1670
3 Cr steel 500~730 707~1829
4 Cr-V steel 500~750 704~1980
5 Cr-Ni steel 500~750 763~2007
6 Cr-Mo steel 500~738 721~1875
7 Cr-Ni-Mo steel 540~738 844~1933
8 Cr-Mn-Si steel 500~750 755~1993
9 Super strength steel 630~800 1180~2652
10 Stainless steel 500~710 703~1676

 

Technical Specifications- Error and repeatability of displayed value see Table1-1 below. Table 1-1

No.
Type of impact device
Hardness value of Leeb standard hardness block
Error of displayed value
Repeatability
1
D
760±30HLD
530±40HLD
±6 HLD
±10 HLD
6 HLD
10 HLD
2
DC
760±30HLDC
530±40HLDC
±6 HLDC
±10 HLDC
6 HLD
10 HLD
3
DL
878±30HLDL
736±40HLDL
±12 HLDL
12 HLDL
4
D+15
766±30HLD+15
544±40HLD+15
±12 HLD+15
12 HLD+15
5
G
590±40HLG
500±40HLG
±12 HLG
12 HLG
6
E
725±30HLE
508±40HLE
±12 HLE
12 HLE
7
C
822±30HLC
590±40HLC
±12 HLC
12 HLC

 

  • Measuring range:HLD(170~960)HLD
  • Measuring direction:0~360°
  • Hardness Scale:HL、HB、HRB、HRC、HRA、HV、HS
  • Display:segment LCD
  • Data memory:max. 100 groups(relative to impact times 32~1)
  • Working power:3V(2 AA size alkaline batteries)
  • Continuous working period:about 100 hours(With backlight off)
  • Communication interface:RS232

 

Configuration

Table 1-2
No. Item Quantity Remarks
Standard Configuration 1 Main unit 1
2 D type impact device 1 With cable
3 Standard test block 1
4 Cleaning brush (I) 1
5 Small support ring 1
6 Alkaline battery 2 AA size
7 Manual 1
8 Instrument package case 1
9
Optional Configuration 11 Cleaning brush (II) 1 For use with G type impact device
12 Other type of impact devices and support rings Refer to Table 3 and Table 4 in the appendix.
13 DataPro software 1
14 Communication cable 1
15 Micro Printer 1
16 Print cable 1

Working Conditions

  • Working temperature: 0℃~+40℃;
  • Storage temperature:
  • 30℃~+60℃
  • Relative humidity: ≤90%;
  • The surrounding environment should avoid of vibration, strong magnetic field, corrosive medium and heavy dust.

 

Table 3

Type of impact device DC(D)/DL D+15 C G E
Impacting energy Mass of impact body 11mJ 5.5g/7.2g 11mJ 7.8g 2.7mJ 3.0g 90mJ 20.0g 11mJ 5.5g
Test tip hardness:Dia. Test tip: Material of test tip: 1600HV3mm Tungsten carbide 1600HV3mm Tungsten carbide 1600HV3mm Tungsten carbide 1600HV5mm Tungsten carbide 5000HV3mm synthetic diamond
Impact device diameter:Impact device length: Impact device weight: 20mm 86(147)/ 75mm 50g 20mm162mm 80g 20mm141mm 75g 30mm254mm 250g 20mm155mm 80g
Max. hardness of sample 940HV 940HV 1000HV 650HB 1200HV
Mean roughness value of sample surface Ra: 1.6μm 1.6μm 0.4μm 6.3μm 1.6μm
Min. weight of sample:Measure directlyNeed support firmly Need coupling tightly >5kg2~5kg 0.05~2kg >5kg2~5kg 0.05~2kg >1.5kg0.5~1.5kg 0.02~0.5kg >15kg5~15kg 0.5~5kg >5kg2~5kg 0.05~2kg
Min. thickness of sample Coupling tightly Min. layer thickness for surface hardening 5mm ≥0.8mm 5mm ≥0.8mm 1mm ≥0.2mm 10mm ≥1.2mm 5mm ≥0.8mm
Size of tip indentation
Hardness 300HV Indentation diameter Depth of indentation 0.54mm 24μm 0.54mm 24μm 0.38mm 12μm 1.03mm 53μm 0.54mm 24μm
Hardness 600HV Indentation diameter Depth of indentation 0.54mm 17μm 0.54mm 17μm 0.32mm 8μm 0.90mm 41μm 0.54mm 17μm
Hardness 800HV Indentation diameter Depth of indentation 0.35mm 10μm 0.35mm 10μm 0.35mm 7μm -- -- 0.35mm 10μm
Available type of impact device DC: Test hole or hollow cylindrical; DL:Testslender narrow groove or hole D+15: Test groove or reentrant surface C: Test small,light,thin parts and surface of hardened layer G: Test large, thick,heavy and rough surface steel E: Test super high hardness material

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