Ni Hard White Cast Irons

Products Details

Ni Hard White Cast Irons

 

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Ni Hard is the trade name for a group of nickel chromium alloyed white cast irons possessing outstanding resistance to abrasion. Ni Hard types 1 and 2 have proved an economic replacement for white cast iron under most conditions of wear-resisting service and for carbon and 12% manganese steels for wear resistance under conditions of moderate impact. Increased wear and impact resistance are possible with Ni Hard 4. Differences in service properties of Ni Hards 1, 2 and 4 are explainable in terms of their microstructural characteristics.   COMPOSITION AND HARDNESS    

Composition, percent

Brinell Hardness

C

Si

Mn

Ni

Cr

S

P

Mo

Spec.

Typical

Ni Hard type 1

3.20

0.30

0.20

3.00

1.50

0.12

0.15

0.50

550

600

(AS2027 Gr Ni Cr 1-550)

3.60

0.80

0.80

5.00

3.00

max.

max.

max.

min.

Ni Hard type 2

2.80

0.30

0.20

3.00

1.50

0.12

0.15

0.50

500

550

(AS2027 Gr Ni Cr 2-500)

3.20

0.80

0.80

5.00

3.00

max.

max.

max.

min.

Ni Hard type 4

3.20

1.50

0.20

4.00

8.00

0.12

0.15

0.50

630

670

(AS2027 Gr Ni Cr 4-630)

3.60

2.20

0.80

5.50

10.00

max.

max.

max.

min.

 

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