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ASTM A532 Class I Type A

Posted by admin on June 15, 2016

Nickel-Chrome-High Carbon Alloy

penticton-foundry-logo.pngThis material may also be called Ni-Hard 1.  Ni-Hard 1 is an abrasion resistant material used in applications where impact is also a concern as the wear mechanism.  Ni-Hard 1 should also be considered if there are low or medium dynamic stresses.  The as-cast hardness is typically 500 BHN depending on the section thickness of the casting.  Ni-Hard 1 is the least expensive wear material, but over the last 10 years many users of this material have been changing to ASTM A532 Class II and III materials.

Composition

 

C

Mn

Si

Cr

Mo

Ni

Min%

2.8

 

 

1.4

 

3.3

Max%

3.6

2.0

0.8

4.0

1.5

5.0


Physical and Mechanical Properties ( reference Abrasion Resistant Handbook)

Density lb/in3 (g/cm3)

0.27-0.28 (7.6-7.8)

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

8.6-17.3 (15-30)

 

 

Coefficient of Thermal Expansion Ɛ/F(Ɛ/C)X106 average between 50-800F

4.5-7.1 (8-1.8)

Melting Temperature (F)

2300 F

Modulus of Elasticity (GPa)

24-26(169-183)

Transverse Strength Ksi( MPa)

70-90 (500-620)

Tensile Strength Ksi(MPa) sand cast

40-50(280-350)


Typical Hardness

 

Brinell (depends on thickness)

Casting Hardness- depending on section thickness

550-690

 

Applications:
This alloy meets the requirements for many applications like mining crusher liners and chute liners.  Parts used in concrete and asphalt work are ideal for this alloy.

Corrosion Resistance:
The higher chromium alloys have improved corrosion resistance compared to Ni-Hard 1.

Processing:
This alloy is supplied in the hardened condition.

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