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C87850 Silicon Brass Available from Dura-Bar Metal Services #

Eco Brass C87850

C87850 Eco Brass® is used to produce a wide variety of parts including faucets, valves, shafts, screws, and bearings. The alloy is available from Dura-Bar Metal Services in solids, tubes and rectangles.

Also known as: CDA C87850, B505-08, C87850

Chemical Composition
Cu% Sn% Pb% Zn% Fe% Ni% Sb% P% S% AI% Mn% Si%
74.00-
78.00
0.30 0.09 REM. 0.10 0.20 0.10 0.05-
0.20
N/A N/A 0.10 2.70-
3.40

Typical Uses

Water supply devices, faucets, valves, fittings, precision parts, substitute for stainless steel, shafts, screws, bearings, electrical parts and automobile parts

Alloy Properties

Tensile Strength, min 65 ksi 448 MPa
Yield Strength @ .5% ext under load min 25 ksi 172 MPa
Elongation in 2 in. or 50 mm min, %   8
Brinell Hardness, min   103
Machinability Rating   70
  US Customary Metric
Melting Point-Liquidus 1616 F 880 C
Melting Point-Solidus 1571 F 855 C
Density 0.300 lb/in3
@ 68 F
8.3 gm/cm3
@ 20 C
Electrical Resistivity 131 ohms-cmil/ft
@ 68 F
21.91 microhm-cm
@ 20 C
Electrical Conductivity 80 %IACS @ 68 F 0.046 MegaSiemens/
cm @ 20 C
Thermal Conductivity 21.80 Btu ft/
(hr ft2 oF) @ 68 F
37.7 W/m oK @ 20 C
Coefficient of
Thermal Expansion
10.30 10-6 per oF
(68-212 F)
18.5 10-6 per oC
(20-100 C)
Coefficient of
Thermal Expansion
10.30 10-6 per oF
(68-392 F)
18.5 10-6 per oC
(20-200 C)
Coefficient of
Thermal Expansion
10.30 10-6 per oF
(68-572 F)
18.5 10-6 per oC
(20-300 C)
Specific Heat Capacity 0.090 Btu/lb/oF
@ 68 F
377. J/kg oK
@ 293 K
Modulus of Elasticity
in Tension
15200 ksi 104800 MPa

*Field Strength 16 kA/m

Joining Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Poor