C46400

Brass, a copper-zinc alloy with a 60:40 ratio, incorporates approximately 1% tin for augmented corrosion resistance, particularly against dezincification. This alloy adopts a two-phase alpha-beta structure, endowing it with a relatively high strength level albeit slightly lower ductility compared to the single-phase 70:30 or alpha brass. It finds application in structural contexts and forgings, particularly in scenarios where exposure to seawater may prompt corrosion. The mechanical attributes closely resemble those of 60:40 brass C28000, although the tin addition contributes to slightly elevated strength. While C46400 is readily amenable to hot working and also accommodates cold working, it exhibits less ease in comparison to single-phase alpha brasses.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu59.0062.00
Pb0.20
Sn0.501.00
Fe0.10
Total Others0.50
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO ASTM B371 (AS PER TEMPER HO2)
Range (Inch) From To UTS Min (ksi) PS Min (ksi) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia)0.0590.500602722
0.5001.0006027256080
1.0002.0005826255580
2.0002.9535425255580
Hex (A/F)0.1180.500602722
0.5001.0006027256080
1.0002.0005826255580
2.0002.7565425255580
Square (A/F)0.1180.500602722
0.5001.0006027256080
1.0002.3625826255580
Rectangle (Thickness)0.11810.500602722
0.5001.0006027256080
1.0001.9685826255580
Range (mm) From To UTS Min (MPa) PS Min (MPa) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia)31241518522
1225415185256080
2550400180255580
5075370170255580
Hex (A/F)31241518522
1225415185256080
2550400180255580
5070370170255580
Square (A/F)31241518522
1225415185256080
2550400180255580
5060370170255580
Rectangle (Thickness)31241518522
1225415185256080
2550400180255580
PHYSICAL PROPERTIES
Melting Point – Liquidus°F1650
Melting Point – Solidus°F1630
Density lb/cu in. at 68°F0.304
Specific Gravity8.41
Electrical Conductivity % IACS at 68°F26
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F)11.8
Specific Heat Capacity Btu/ lb /°F at 68°F0.09
Modulus of Elasticity in Tension ksi15000
Modulus of Rigidity ksi5600
FABRICATION PROPERTIES
TechniqueSuitability
SolderingExcellent
BrazingExcellent
Oxyacetylene WeldingGood
Gas shielded Are WeldingFair
Coated Metal Are WeldingNot Recommended
Spot WeldGood
Seam WeldFair
Butt WeldGood
Capacity for Being Cold WorkedFair
Capacity for Being Hot FormedExcellent
Forgeability Rating90
Machinability Rating30

C46400

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