Crowdly

malleable cast iron, Rm=350 N/mm2, A=4%

malleable cast iron, Rm=350 kgf/mm2, A=4%

ductile cast iron, Rm=350 kgf/mm2, A=4%

What is the type and properties of cast iron GJL-350?

white cast iron, Rm=350 N/mm2

grey cast iron, Rm=350 N/mm2

grey cast iron, HB=350

grey cast iron, Rm=350 kgf/mm2

Calculate the Brinell hardness, when the diameter of ball D = 10 mm, F = 3000 kgf and the identation diameter is d = 4.6 mm.

Calculate Vickers hardness for diagonal d = 0.257 mm and force F = 20 kgf

What is the load and indenter used on the Rockwell Method C scale?

Which hardness measurement method should I choose for measuring 10mm thick steel sheet?

HRB

HRC

HRA

How is the Brinell hardness value denoted?

HRA 55

HRC 45

HB 60

HRB 200

HV 200

Which hardness measurement method should I use to measure hardened and aged duraluminium?

HRB

HRC

HRA

Indenter is 1,588 mm diameter ball with a load of 980 N and a pre-load of 98 N

Indenter is a ball (diameter 10; 5; 2,5; 2; 1 mm) and uses a load of 9.8 to 29430 N

Indenter is a cone with a tip angle of 120 degrees and a load of 1470 N and a preload of 98 N

Indenter is a diamond pyramid with a face angle of 136 degrees and a force of 9.8 to 980 N

Which hardness measurement method(s) should I use to measure the hardness of a hardened and annealed shaft with a 50 mm diagonal?

HRB

HRC

HRA

Which Rockwell hardness scale has the highest loading force?

HRC

HRA

HRE

HRB