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In these irons a development of iron-chromium carbides produce a tougher more abrasion resistant iron.

The variation of carbon content effects the toughness and abrasion resistance.

Greater carbon increases the resistance to abrasion, however at the loss of toughness and vice versa lowering the carbon increases toughness but decreases the resistance to wear.

Hardness ranges dependent on section thickness can be between 450-600 BHN

The use for Ni-Hards is in pulverising, crushing and impact wear plates also in heavy duty pump casings and impellers for slurry and gravel applications.

Grade
Carbon %
Silicon %
Manganese %
Nickel %
Chrome %
2A
2.7 to 3.2
0.3 to 0.8
0.2 to 0.8
3.0 to 5.5
1.5 to 3.5
2B
3.2 to 3.6
0.3 to 0.8
0.2 to 0.8 3.0 to 5.5
1.5 to 3.5
2C
2.4 to 2.8
1.5 to 2.2
0.2 to 0.8 4.0 to 6.0
8.0 to 10.0
2D
2.8 to 3.2
1.5 to 2.2 0.2 to 0.8 4.0 to 6.0 8.0 to 10.0
2E
3.2 to 3.6
1.5 to 2.2 0.2 to 0.8 4.0 to 6.0 8.0 to 10.0

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