XRock-150A Type Manual Rockwell Metal Hardness Testing Machine with
● HRA is widely used to measure hardness of carbide alloy, quenched
hardening steel after carbonized, hardened thin steel strip and
plate, etc. For materials HRC > 67, it is more likely to damage
the diamond indenter if we use 1471 test force. For those
materials, we had better choose HRC hardness scale which has small
test force and indentation.
● HRB is suitable to test medium hardness materials such as low and
medium carbon steel after annealing treatment, malleable iron, all
kinds of brass, bronze, hard aluminum alloy after solution
treatment and so on. The applicable scope is 20~100 HRB. when the
material hardness is under 20HV, on account of the creep of metal
the specimen deformation will last for a long time under the test
force. The needle on indicator dial or optical projection scale
moves slowly, causing difficulty in measuring precision. While when
the material hardness exceeds 100 HV, the shallow indentation depth
decreases sensitivity affecting measuring precision.
● HRC is most applicable to testing carbon steel after quenching or
low tempering, alloy steel, tool steel, die steel, as well as
chilled cast iron, titanium alloy and so on. Generally, we apply
HRC scale to test materials HRB>100, and HRB scale to test
materials HRC<20 avoiding influence caused by glide of indenter.
|Product name||Manual Rockwell Hardness Tester|
|Measuring range||20-88HRA, 20-100HRB,20-70HRC|
|Dial pointer range||A,C (black) :0-100；B(red):30-130|
|Preliminary test force||10kgf (98.07N)|
|Rockwell test force||60Kgf(558.4N),100Kgf(980.7N),150Kgf(1471N)|
|Hardness indication||Dial Reading|
|Max height of specimen||170mm|
|Dimension||470 x 240 x 630mm|
|Packing dimension||540 x 420 x 700mm|
|Power supply||AC 220V/50Hz;AC110V/60Hz|
|Gross/ Net weight||65Kg/56Kg|
|Execution standard||GB/T230.2, JIS Z2245, EN-ISO 6508 , ASTME-18|
XRock-150A Standard Delivery:
|Instrument main body||Ø1.588mm ball indenterl||Weight A|
|Ø58mm V-shape anvil||Ø1.588mm Steel ball||Weight B|
|Hardness block||Cone diamond indenter||Weight C|
|Anti-dust cover||Ø150mm Flat anvil||Accessory box|
|Warranty card||Qualified certificate||Instrument manual|
The Rockwell test consists of measuring the additional depth to
which a carbide ball or diamond penetrator is forced by a heavy
(major) load beyond the depth of a previously applied light (minor)
load (SET point).
The minor load is applied first and a SET position is established
on the dial gauge or displacement sensor of the Rockwell tester.
Then the major load is applied. Without moving the piece being
tested, the major load is removed and, with the minor load still
applied, the Rockwell hardness number is automatically indicated on
the dial gauge or digital display.
The diamond penetrator is used for testing materials such as
hardened steels and cemented carbides. The carbide ball
penetrators, available with 1/16 inch, 1/8 inch, 1/4 inch, and 1/2
inch diameter, are used when testing materials such as steel-copper
alloys, aluminum and plastics to name a few.
Rockwell testing falls into two categories: Regular Rockwell
testing (e.g., C and B scales) and Rockwell superficial testing
(e.g., 30 N and 30 T scales).
High Rockwell hardness numbers represent hard materials and low
numbers soft materials.