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Engineering Materials

Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 48
RC 57
RC 65
RC 80

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Engineering Materials
The surface hardness of the following order is achieved by nitriding operation

1500 VPN
250 VPN
1000 to 1100 VPN
600 VPN

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Engineering Materials
Cemented carbide tools are not found to be suitable for cutting

Aluminium
Brass
Steel
Cast iron

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Engineering Materials
Heavy duty leaf and coil springs contain carbon of the following order

0.01
0.008
0.002
0.005

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Engineering Materials
An eutectoid steel consists of

Pearlite and ferrite
Pearlite and cementite
Wholly pearlite
Wholly austenite

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Engineering Materials
Following elements have face-centered cubic structure

All of these
Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
A iron (below 910°C and between 1400 to 1539°C), W
Mg, Zn, Ti, Zr, Br, Cd

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