Portable Hardness Tester

Hardness Tester

HT-7

HT-7: Portable Hardness Tester

HT-7 is a hardness tester which uses an impact body with a tungsten carbide tip, which is impelled by a spring onto the metal surface. The ratio of rebound velocity to the impact velocity is proportional to the hardness of the sample. The instrument converts this into a hardness value in various scales.

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Technical Details

	HT-7
Application Areas	In situ hardness measurement of: Dies and moulds Large and heavy work pieces Shafts Bearings Lab measurements on special forms Identification of materials by measuring strength of material
Range	See Table 1
Strength of material	See Table 2
Impact Device	Tungsten Carbide ball
Measuring Area (Aperture)
Accuracy
Operating Temperature	10° C to 50° C
Battery	4 penlite cells (50-60 hours)
Dimensions H x W x D (in mm)	150 H x 80 W x 45 D
Weight (with battery)	365 grams

Range & Material Table 1

	HRC	HRB	HB	HV	HSD
Steel	18-68.5	60-99.5	93-651	83-976	32-99.5
C.W. Tool Steel	20-67			80-898
Cast Aluminium			30-159
Grey Cast Iron			93-334
Nodular Cast Iron			131-387
W.P Iron	HL ONLY
Brass		14-95	40-173
Bronze			60-290
Copper			45-315

Strength of Material Table 2

Code. No.	Sample Material	LD	Ob(Mpa)
1	Carbon Steel	350 – 710	374 – 1670
2	Cr – Steel	500 – 730	707 – 1829
3	CrV – Steel	500 – 750	704 – 1980
4	CrNi – Steel	500 – 749	763 – 1999
5	CrMo – Steel	500 – 730	721 – 1813
6	CrNiMo – Steel	540 – 730	844 – 1869
7	CrMnSi – Steel	500 – 750	755 – 1993
8	Super Strength Steel	630 – 740	1180 – 1936
9	Stainless Steel	500 – 710	730 – 1676

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HT-7: Portable Hardness Tester