MH180 Hardness Tester

Click here for PDF Manual

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
Material	Method	D/DC D+15	C	G	E	DL
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
Cold work tool steel	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
Cast aluminium alloys	HRB 23.8～84.6	22.7～85.0	23.8～85.5
BRASS(copper-zinc alloys)	HB 40～173
BRASS(copper-zinc alloys)	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