LEAD-FREE
HARDNESS/MACHINABILITY RATINGS

 

Lead-free Hardness Ratings

Copper alloy UNS No. Product description Temper Hardness Type Typical or Minimum Hardness
C89831 Bismuth Tin bronze M07 Brinell 500 kg load Typical 55
C89844 Bismuth Tin bronze M07 Brinell 500 kg load Typical 55
C89833 Bismuth Tin bronze M07 Brinell 500 kg load Typical 60
C89835 Bismuth Tin bronze M07 Brinell 500 kg load Typical 65
C90300 Tin bronze M07 Brinell 500 kg load Typical 70
C89325 Bismuth Tin bronze M07 Brinell 500 kg load Typical 73
C69300 Lead-free Brass H02 Rockwell “B” Hardness Max. 80
C90800 Tin bronze M07 Brinell 500 kg load Typical 95
C90810 High Tin bronze M07 Brinell 500 kg load Typical 95
C87850 Silicon brass M07 Brinell 500 kg load Min. 103
C95400 Aluminum bronze M07 Brinell 3000 kg load Typical 170
C95400HT Aluminum bronze TQ50 Brinell 3000 kg load Typical 177
C95500 Nickel-Aluminum bronze M07 Brinell 3000 kg load Typical 208
C95500HT Nickel-Aluminum bronze TQ50 Brinell 3000 kg load Typical 228
C95900 Aluminum bronze M07 Brinell 3000 kg load Min. 241
Note: HT = heat treated

Lead-free Machinability ratings

Copper alloy UNS No. Product description Machinability
C69300 Lead-free Brass 85
C89831 Bismuth Tin bronze 85
C89833 Bismuth Tin bronze 81
C89325 Bismuth Tin bronze 80
C87850 Silicon brass 70
C89835 Bismuth Tin bronze 70
C89844 Bismuth Tin bronze 70
C90300 Tin bronze 60
C95400 Aluminum bronze 60
C95400HT Aluminum bronze 50
C95500 Nickel-Aluminum bronze 50
C95500HT Nickel-Aluminum bronze 30
C90800 Tin bronze 20
C90810 High Tin bronze 20
C95900 Aluminum bronze 10
Note: HT = heat treated
Lead-free Hardness & Machinability ratings