COMPANY PRODUCT

1. Hardness is one of the often-used mechanic characteristics of the material while the hardness testing is an important method to judge the quality of the metal material or its component parts. The hardness of the metal is correspondent to its other mechanic characteristics, and so its mechanic characteristics such as the strength, tiredness, wriggling and wearing out can be tested out approximately through its hardness testing.
2. Digital Double Rockwell Hardness Tester with a novel and pleasing appearance, full functions, easy operation, clear and direct-viewing display, and stable performance is a high-tech and new product combining the mechanic and electric features. This tester is able to measure the Rockwell and superficial Rockwell hardness value with all scales. Its main function is as follows:
2.1 The Selection of all hardness scales for Rockwell and superficial Rockwell.
2.2 The hardness values exchange among various hardness scales.
2.3 The selection of dwell time for hardness test.
2.4 The revising of the value for year, month and date.
2.5 The RS232 serial communication is supplied to clients for the functional expansion.
The Present hardness tester with the storage function can be browsed the hardness testing page and output the hardness testing results with printer.
 
Technical Specifications
1. The Power Source and the Voltage:       AC220V±5%, 50-60 Hz
2. Time-delayed control:                 2-60 seconds, adjustable
3. The Max. Height of the Testing Specimen:            175 mm
4. The Distance from the Indenter Center to the Instrument Body:    165mm.
5. Overall Dimension (Length×Width×Height):     551×260×800 mm
6. The Net Weight of the Tester:                    80kg (Approx).

Rockwell Hardness

Rockwell Hardness
Test Force	Initial Test Force（N）		98.07（10kg）			Tolerance±2.0%
	Total Test Force（N）		588.4（60 kg）			Tolerance±1.0%
			980.7（100 kg）
			1471（150kg）
Indenter	Diamond Cone Indenter
	Ф1.5875mm Ball Indenter
Scale	HRA	HRB		HRC	HRD		HRE
	HRF	HRG		HRH	HRR		HRM
	HRP	HRS		HRK	HRL		HRV

 
8. The allowed tolerances of the Rockwell hardness displaying values

Scales	Hardness Range of the  Standard Hardness Blocks	Allowed Tolerance of  Displaying Value	Allowed Repeatability of  Displaying Value a
A	(20~≤75)HRA	±2HRA	≤0.02（100－H）  or 0.8 Rockwell unit b
	(＞75~≤88) HRA	±1.5HRA
B	(20~≤)45HRB	±4HRB	≤0.04（130－H） or 1.2 Rockwell unit b
	(＞45~≤80)HRB	±3HRB
	(＞80~≤100)HRB	±2HRB
C	(20~≤70)HRC	±1.5HRC	≤0.02（100－H） or 0.8 Rockwell unit b
a：H means average hardness value        b：select a larger value

 
Superficial Rockwell hardness
9. The technical specifications of superficial Rockwell hardness

Superficial Rockwell
Test Force	29.42（3 kg）	Allowed Tolerance±2.0%
	147.1（15 kg）	Allowed Tolerance±1.0%
	294.2（30 kg）
	441.3（45 kg）
Indenter	Diamond Cone Indenter
	Ф1.5875mm Ball Indenter
Scales	HR15N、 HR30N 、 HR45N
	HR15T、 HR30T 、 HR45T
	HR15W、 HR30W、 HR45W
	HR15X、 HR30X、 HR45X
	HR15Y、 HR30Y、 HR45Y

 
10. The repeatability of the superficial Rockwell hardness displaying values and allowed tolerance of displaying value

Scales	Hardness Range of the Standard Hardness Blocks	Allowed Tolerance of Displaying Value	Allowed Repeatability of Displaying Value a
15N	（0~77）HR 15N	±2 HRN	≤0.04(100－H)or  1.2 Rockwell unit b
	（78~88）HR 15N
	（89~91）HR 15N
30N	（42~54）HR 30N
	（55~73）HR 30N
	（74~80）HR 30N
45N	（20~31）HR 45N
	（32~61）HR 45N
	（63~70）HR 45N
15T	（73~80）HR 15T	±3 HRT	≤0.06(100－H)or 2.4 Rockwell Unit b
	（81~87）HR 15T
	（88~93）HR 15T
30T	（43~56）HR30T
	（57~69）HR 30T
	（70~82）HR 30T
45T	（12~33）HR 45T
	（34~54）HR 45T
	（55~72）HR 45T
a：H means average hardness value b：select a larger value