C48500

Alloy 485, known as naval brass, finds prominent utilization in machine hardware, screw machine products, and valve stems. This variant of naval brass, possessing attributes that are conducive to hot forging, pressing, and machining, stands out. Notably, it boasts elevated ductility and remarkable electrical and thermal conductivity. Additionally, 485 naval brass demonstrates commendable creep resistance and impressive impact strength.

CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 59.00 62.00
Pb 1.30 2.20
Sn 0.50 1.00
Fe 0.10
Total Others 0.40
Zn Remainder
(1) Cu + Sum of Named Elements 99.6% min.
MECHANICAL PROPERTIES ACCORDING TO ASTM B21 (AS PER TEMPER HO2)
Range (Inch) From To UTS Min (ksi) PS Min (ksi) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia)0.0590.500602712
0.5001.0006027126585
1.0002.0005826206085
2.0002.9535425206085
Hex (A/F)0.1180.500602712
0.5001.0006027126585
1.0002.0005826206085
2.0002.7565425206085
Square (A/F)0.1180.500602712
0.5001.0006027126585
1.0002.0005826206085
2.0002.3625425206085
Rectangle (Thickness)0.1180.500602712
0.5001.0006027126585
1.0001.9685826206085
Range (mm) From To UTS Min (MPa) PS Min (MPa) Elongation Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia)1.51241518512
1225415185126585
2550400180206085
5075370170206085
Hex (A/F)31241518512
1225415185126585
2550400180206085
5070370170206085
Square (A/F)31241518512
1225415185126585
2550400180206085
5070370170206085
Rectangle (Thickness)31241518512
1225415185126585
2550400180206085
PHYSICAL PROPERTIES
Melting Point – Liquidus°F1650
Melting Point – Solidus°F1630
Density lb/cu in. at 68°F0.305
Specific Gravity8.44
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
BrazingGood
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingNot Recommended
Coated Metal Arc WeldingNot Recommended
Spot WeldNot Recommended
Seam WeldNot Recommended
Butt WeldFair
Capacity for Being Cold WorkedPoor
Capacity for Being Hot FormedGood
Forgeability Rating90
Machinability Rating70

C48500

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