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Diamond 25 Chrome White Iron Data Sheet

Posted by admin on May 4, 2016

Diamond 25 Alloychrome-white-iron-blow-bars.jpg

Diamond 25 is a hypereutectic high chrome white iron alloy.  The microstructure is 40% carbides by volume with the remainder being martensite.  With the increased amount of Cr present in the iron the hardness of the M7C3 carbides is higher.  The high CVF and harder carbides leads to an increased abrasion resistance.  Castings poured with this alloy can be machined, but not drilled and tapped.  Machining would be done for fit surfaces only. 

Composition

 

C

Mn

Si

Cr

Mo

Min%

2.5

 

 

23

 

Max%

3.5

1.0

1.5

30

1.5


Physical and Mechanical Properties (reference Abrasion Resistant Handbook)

Density lb/in3 (g/cm3)

0.26 (7.6)

Thermal Conductivity   Btu/hr·ft·F (W/m·K)

8.6-17.3 (15-30)

Specific Heat at 70F  Btu/lb·F (J/Kg·k)

0.119

Coefficient of Thermal Expansion Ɛ/F(Ɛ/C)X106 average between 70-1112F

7.2 (13)

Melting Temperature (F)

2300 F

Compressive Strength Ksi (MPa)

429 (2960)

Transverse Strength Ksi( MPa)

136 (938)

 

 



Typical Hardness

 

Brinell (depends on thickness)

As-Cast

450-550

Hardened

>650

 

 


Applications

This alloy meets the requirements for many applications:

  • mining crusher liners
  • chute liners
  • dredge pumping
  • impellers
  • crushing bars
  • anvils
  • hammers 
  • mining crusher parts

Corrosion Resistance

This alloy has good corrosion resistance.  For a more extreme corrosion environment and abrasive wear mechanism consider using an alloy with 28-30% Cr.

Processing

This alloy is supplied in the hardened condition.
It can be machined and faced for fit purposes, but it can’t be drilled and tapped.
Inserts can be cast in if drilling and tapping is necessary.