NI HARD WHITE CAST IRONS

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, per cent

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.

TYPICAL APPLICATIONS

Ni Hard types 1 and 2
  • Metal-working rolls
  • Grinding mill liners
  • Pulveriser rings
  • Slurry pump parts
  • Grinding media
  • Wear Plates Hammers
    Ni Hard type 4    
  • Slurry pump parts
  • Impact blow bars
  • Slurry Pump Parts

    Breaker Bars