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standard hardness for grinding ball

PRACTICAL HARDNESS TESTING MADE SIMPLE 9 3 BRINELL HARDNESS TEST One of the most popular hardness testing methods Brinell Hardness Number is obtained using a perfectly spherical hardened steel ball of 10 mm pressed against the test surface using a static force of 3000 kg 2942 kiloNewton for at least 10 seconds for steel and measuring

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