ASTM A532 Class I Type A
on June 15, 2016Nickel-Chrome-High Carbon Alloy
This 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.