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Wear Resistance

HAYNES® 25 alloy exhibits excellent resistance to metal galling and cavitation. Metal-to-Metal Galling results shown below were generated for standard matching material room-temperature pin on disc tests. Wear depths are given as a function of applied load. Cavitation tests were performed in accordance with ASTM G 32 water at 16°C, with a frequency of 20 kHz and an amplitude of 0.05 mm.  The results of the wear tests indicate that 25 alloy is superior in galling and cavitation resistance to many materials, and is surpassed only by ULTIMET® alloy and HAYNES® 6B alloy. Both of these materials were specifically designed to have excellent wear resistance.

Alloy Galling - Degree of Damage for Various Applied Loads
3,000 lbs. (1,365 kg) 6,000 lbs. (2,725 kg) 9,000 lbs. (4,090 kg)
- mils µm mils µm mils µm
6B 0.02 0.6 0.03 0.7 0.02 0.5
ULTIMET® 0.11 2.9 0.11 2.7 0.08 2.0
25 0.23 5.9 0.17 4.2 0.17 4.2
188 1.54 39.2 3.83 97.3 3.65 92.6
HR-160® 1.73 43.9 4.33 109.9 3.81 96.8
214® 2.32 59.0 3.96 100.5 5.55 141.0
556® 3.72 94.4 5.02 127.6 5.48 139.3
230® 4.44 112.7 7.71 195.8 8.48 215.5
HR-120® 6.15 156.2 7.05 179.0 10.01 254.2
Alloy Cavitation - Mean Depth of Erosion
24 h 48 h 72 h 96 h
mils µm mils µm mils µm mils µm
ULTIMET® 0.3 6.8 0.9 22.9 1.6 40.2 2.3 57.4
6B 0.3 7.7 0.9 22.3 1.4 34.8 1.9 48.0
25 1.0 24.4 2.1 53.6 3.4 85.6 4.5 115.1
625 3.1 80.0 7.0 176.6 10.2 259.2 Not tested Not Tested
556® 3.3 83.8 6.9 175.8 9.6 244.3 11.4 289.8
230® 3.8 97.6> 7.5 190.1 9.9 251.8 11.9 301.7

Tested in accordance with ASTM G 32 water at 16ºC, with a frequency of 20 kHz and an amplitude of 0.05 mm

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