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| MECHANICAL PRADHAN | HARNESS CONVERTER |
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HARDNESS CONVERSION |
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HARDENED STEEL AND HARD ALLOYS (INSTRUMENT - ROCKWELL STANDARD) INDENTOR – DIAMOND PENETRATOR
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HRC - Hardness according to Rockwell(HRc -cone and HRb – ball) Load – 150 kg |
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HRA – Rockwell hardness A scale Load – 60 kg |
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HRD- Rockwell D Scale Load – 100 kg |
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Rockwell Hardness Tester |
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HARDNESS CONVERSION CALCULATOR |
Hardness Converter |
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ROCKWELL PENETRATOR TYPES |
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What is Rockwell
hardness tester ? – An instrument
for measuring the hardness specifically -HRA/HRD/HRC with different loads & penetrators. |
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1.- BALL PENETRATOR (TWO TYPES ) 1.
STEEL INDENTOR 2.
TUNGASTON INDENTOR |
FOR SOFT
MATERIAL |
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2.- DIAMOND PENETRATOR
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FOR HARD
MATERIAL |
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ROCKWELL PENITRATOR
(INDENTERS) & USES |
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Method Indenters |
Indenters
Type |
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HRA |
Diamond
120° |
Case-hardened steels and alloys, hard metals/carburising parts |
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HRBW |
1/16"
ball |
Copper (Cu) alloys,
unhardened steels (in the USA, also for steel
up to approx. 686 N/mm²) |
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HRC |
Diamond
120° |
Case-hardened steels and
alloys, hard metals |
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HRD |
Diamond
120° |
Case-hardened steels and
alloys, hard metals |
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HREW |
1/8"
ball |
Aluminum (Al) alloys, copper
(Cu) alloys |
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HRFW |
1/16"
ball |
Thin, soft sheet steel |
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HRGW |
1/16"
ball |
Bronze, copper (Cu), cast
iron |
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HRHW |
1/8"
ball |
Aluminum (Al), zinc (Zn),
lead (Pb) |
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HRKW |
1/8"
ball |
Bearing metals and other
very soft or thin materials, including plastics
(see ASTM D785) |
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HRLW |
1/4"
ball |
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HRMW |
1/4"
ball |
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HRPW |
1/4"
ball |
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HRRW |
1/2"
ball |
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HRSW |
1/2"
ball |
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HRVW |
1/2"
ball |
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