EXTRUDED OR CAST AND DRAWN
HARDNESS/MACHINABILITY RATINGS

Reference guide

Extruded or cast and drawn Hardness Ratings

Copper alloy UNS No. Product description Temper Hardness Type Typical or Minimum Hardness
C14500 Tellurium Copper H02, H04 Brinell 500 kg load Typical H02-76, H04-81
C23000 Red Brass 85%
C24000 Low Brass 80% H01, H02, H04 Rockwell “B” Typical H01-55, H02-70, H04-82
C26000 Cartridge Brass 70% H01, H02, H04 Rockwell “B” Typical H01-55, H02-70, H04-82
C31400 Leaded commercial bronze H02 Rockwell “B” Typical 61
C31600 Leaded Commercial Bronze* H04 Rockwell “B” Typical 61
C46400 Naval Brass, Uninhibited H02 Rockwell “B” Min. to Max. 55-80
C51000 Phosphor Bronze 5% A H04, H08 Rockwell “B” Typical 87
C52100 Phosphor Bronze 8% C H04 Rockwell “B” Typical 93
C53400 Phosphor Bronze B-1 H04 Rockwell “B” Typical 86
C54400 Phosphor Bronze B-2 H04 Rockwell “B” Typical 80
C62400 Aluminum bronze 11%
C63000 (AMS 4640) Nickel-Aluminum bronze HR50, TQ50 Brinell 3000 kg load Min. to Max. 187-248
C63020 (AMS 4590) Nickel-Aluminum bronze TQ50 Rockwell “C” Min. 26
C64200 (AMS 4634) Aluminum bronze HR50 Rockwell “B” Min. 80
C64210 Aluminum Silicon bronze HR50 Rockwell “B” Min. to Max. 65-100
C65100 Low-Silicon bronze B H02, H04, H06 Rockwell “B” Min. to Max. 60-95
C67300 Manganese bronze H02 Rockwell “B” Min. 65
C67400 Manganese bronze Rockwell “B” Min. 78
C67410 Manganese bronze
C67600 Manganese bronze H02, H04 Rockwell “B” Typical 90
C69300 Lead-free Brass H02 Rockwell “B” Max. 85
C69400 Silicon Red Brass H02, H04 Rockwell “B” Typical 95
C69430 Silicon Red Brass H02, H04 Rockwell “B” Typical 95
C72900 (AMS 4596) Copper Nickel-Tin bronze TX 00 Rockwell “C” Min. 30
C72900 (AMS 4597) Copper Nickel-Tin bronze TX TS Rockwell “C” Min. 34
C72900 (AMS 4598) Copper Nickel-Tin bronze TX 00 Rockwell “C” Min. 30
*(nickel-bearing).

Extruded or cast and drawn Machinability ratings

Copper alloy UNS No. Product description Machinability
C14500 Tellurium Copper 85
C69300 Lead-free Brass 85
C31400 Leaded commercial bronze 80
C31600 Leaded Commercial Bronze (nickel-bearing) 80
C54400 Phosphor Bronze B-2 80
C67410 Manganese bronze 80
C53400 Phosphor Bronze B-1 70
C67300 Manganese bronze 70
C64200 (AMS 4634) Aluminum bronze 60
C64210 Aluminum Silicon bronze 60
C67600 Manganese bronze 60
C62400 Aluminum bronze 11% 50
C23000 Red Brass 85% 30
C24000 Low Brass 80% 30
C26000 Cartridge Brass 70% 30
C46400 Naval Brass, Uninhibited 30
C63000 (AMS 4640) Nickel Aluminum bronze 30
C65100 Low-Silicon bronze B 30
C67400 Manganese bronze 30
C69400 Silicon Red Brass 30
C69430 Silicon Red Brass 30
C51000 Phosphor Bronze 5% A 20
C52100 Phosphor Bronze 8% C 20
C63020 (AMS 4590) Nickel Aluminum bronze
C72900 (AMS 4596) Copper Nickel-Tin bronze
C72900 (AMS 4597) Copper Nickel-Tin bronze
C72900 (AMS 4598) Copper Nickel-Tin bronze