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REXALLOY®™ GRADE 33
Wear, Corrosion Resistant Parts & Cutting Tools
Abrasion and Wear Resistance:
Conventional indentation hardness tests or Rockwell tests do not generally determine the relative wear resistance of REXALLOY®™ as compared with other materials such as tool steels. High carbon-high chrome tool steels commonly used for maximum resistance to abrasion or wear can be heat treated to about 64 Rockwell C (885 VPN). REXALLOY®™ , for non-cutting applications, has a hardness of about 54 Rockwell C (654 VPN). However, the hardness of the individual micro-constituents gives an entirely different picture:
The primary carbides in REXALLOY®™ are much harder than the large carbides in high carbon-high chrome tool steel, 1810 VPN as compared to 1390 VPN, although the matrix in REXALLOY®™ is softer, 488 VPN as compared to 840 VPN. Thus, the conventional Rockwell tests provide an average hardness which mask the effect of hard and soft constituents in a CAST heterogeneous alloy of this type. It is the large surface area of massive primary high-hardness carbides which produces the wear resistant quality of REXALLOY®™ .
TABER Wear Test Results
The samples were tested to 10,000 cycles with a 1000 gram load - 500 grams on each wheel. The abrading wheel was H-1O calibrade, a wheel designed for alloys resistant to abrasion.
| After 10,000 cycles, results as follows: |
| REXALLOY®™ 33 |
Milligrams Lost |
Wear Factor |
Hardness |
| 4" x 4" x 1/8" Sample |
28.3 |
2.83 |
56 |
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General Corrosion Resistance >
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