APPENDIX L
SOME USEFUL ALLOYS

Name of AlloyParts of
Copper		Parts of
Tin		Parts of
Zinc		Parts of
Lead		Parts of
Other Metals
Gun Metal919
Bell Metal7525
Phosphor Bronze92½7½ phosphorus
Aluminum Bronze9010 aluminum
Common Brass66⅔33⅓
Brazing Metal (soft)5012½37½
German Silver602020 nickel
Common Solder5050
Fine Solder66⅔33⅓
Babbitt Metal3898 antimony
Pewter8020
Type Metal8020 antimony
Aluminum Solder955 bismuth

Magnetic Alloy.—An alloy that has strong magnetic properties is made of 25 parts of manganese, 14 parts of aluminum and 61 parts of copper, yet none of these metals are even slightly magnetic.

APPENDIX M
SOME HARD SOLDERS

Hard solders melt only at red heat and are used for soldering gold, silver, brass and other metals where a good strong joint is needed.

Metal to be
Soldered		Parts of
Gold		Parts of
Brass		Parts of
Silver		Parts of
Zinc		Parts of
Other Metals
Gold66.6722.2211.11 copper
Silver43.75506.25
Brass87.5 12.5 

APPENDIX N
HIGH SPEED STEEL