SWISSMETAL (CuSn6)              C51900                                  AVINS 

Guaranteed composition

Cu remainder,     Sn 5.00 - 7.00,      P 0.3 – 0.35,      Pb 0.05 max.,            Fe 0.10 max,      Zn 0.20 max.

Main technological
characteristics

A tin bronze with very high strength and corrosion resistance

Delivery form

Specialties

Wires (f max 0.059" - 0.315"), rods (f max 0.059" - 0.354") and profiles

 small drawn dimensions

Physical properties

density (68 °F)
electrical conductivity
thermal conductivity
thermal capacity (specific heat)
coefficient of thermal expansion
magnetic properties
melting interval
color

0.318 lb/in³
16 %IACS
516 Btu.in./h.ft².°F
0.09 Btu/lb.°F
0.000010 in/in. °F
non magnetic
1620 – 1880 °F
brown
 

Capacity for forming/machining

Temper range
available

machinability rating (free cutting brass = 100)
tool life (free cutting brass = 110)
tendency for short chips (free cutting brass = 90)
capacity for cold working
capacity for hot working
capacity for soft soldering
capacity for soldering
capacity for welding
capacity for brazing
annealing
capacity for polishing
capacity for galvanic plating
 
wire :  from annealed to very hard
rod :  from slightly drawn to hard

modulus of elasticity = 17,400,415 PSI

poor (25)
poor
poor
excellent
moderate
excellent
medium to good
good
good
good
good
good

Corrosion resistance

stress corrosion
industrial atmosphere
rural atmosphere
marine atmosphere
chlorine (humid)
vinegar
fresh water
high relative humidity and elevated temperature
sea water
stress corrosion

no sensitivity
good
good
good
poor
middle
good
middle-good
good
good

galvanic:

Copper alloys present a high and positive standard potential of corrosion. Consequently, there is a risk of galvanic corrosion if they enter into contact with material of lower standard potential such as, for example, steels containing less than 13% chromium.

Typical applications

Fasteners industry, Electronic and electrical components
Safety lock industry, Spring industry
Weaving wire,  Fabrication material