Metallurgical specifications of all configurations of Bronze C91700

General Characteristics
C91700 is a medium strength casting alloy. It has a good combination of strength, ductility and resistance to corrosion and wear. Its typical tensile strength is 60 ksi in the as-cast condition. Typical applications include gears and worm wheels.
Typical Chemical Composition

Weight % Cu⁽¹⁾ Al Sb Fe Pb Ni+Co P⁽²⁾ Si S Sn Zn

minimum 84.00 — — — — 1.20 — — — 11.30 —

maximum 87.00 .005 .20 .20 .25 2.00 .30 .005 .05 12.50 0.25

(1) In determining Cu-min., Cu may be calculated as Cu + Ni.

(2) For continuous castings, P shall be 1.5% max.

Note: Cu + sum of named elements, 99.4% min.

Weight %	Cu⁽¹⁾	Al	Sb	Fe	Pb	Ni+Co	P⁽²⁾	Si	S	Sn	Zn
minimum	84.00	—	—	—	—	1.20	—	—	—	11.30	—
maximum	87.00	.005	.20	.20	.25	2.00	.30	.005	.05	12.50	0.25

Characteristics		English	Metric
Nominal density	20°C / 68°F	0.316 lbs/in³	8.75 g/cm³
Melting range	Liquidus	1859 °F	1015 °C
Melting range	Solidus	1563 °F	851 °C
Specific heat	20°C / 68°F	0.09 BTU/lb – °F	377 J/KG- °K
Coefficient of thermal expansion	68°F – 392°F 20°C – 200°C	9.0 micro in/in- °F	16.2 micro m/m- °K
Thermal conductivity	20°C / 68°F	40.8 BTU/ft- hr – °F	70.6 W/m – °K
Electrical resistivity	20°C / 68°F	172.4 nΩ ∙ m
Electrical conductivity	Volumetric: 20°C / 68°F	10% IACS

Bronze Alloy C91700