Alloy name |
C2600 |
C2680 |
C2720 |
C2801 |
Chemical Composition (wt%) |
Cu |
68.5-71.5 |
64-68 |
62-64 |
59-62 |
Zn |
Balance |
Balance |
Balance |
Balance |
Pb |
≤0.05 |
≤0.05 |
≤0.07 |
≤0.10 |
Fe |
≤0.05 |
≤0.05 |
≤0.07 |
≤0.05 |
Physical Properties |
Melting Temp. (℃) |
954 |
932 |
916 |
904 |
Specific Gravity |
8.53 |
8.47 |
8.44 |
8.39 |
Thermal Conductivity{W/(m·K)} |
121 |
116 |
116 |
123 |
Coefficient of Thermal Expansion(10-6/K) |
20.0 |
20.3 |
20.5 |
20.9 |
Modulus of Elasticity in Tension(kN/mm²) |
110 |
103 |
103 |
103 |
Poisson's Ratio |
0.33 |
0.35 |
0.35 |
0.35 |
Electrical Conductivity (%IACS) |
28 |
27 |
27 |
28 |
Mechanical Properties |
Tensile Strength (N/㎟) |
O |
≥275 |
≥275 |
≥275 |
≥325 |
1/4H |
325-420 |
325-420 |
325-410 |
355-440 |
1/2H |
355-450 |
355-450 |
355-440 |
410-490 |
3/4H |
375-490 |
375-490 |
≥410 |
≥470 |
H |
410-540 |
410-540 |
- |
- |
EH |
520-620 |
520-620 |
- |
- |
SH |
570-670 |
570-670 |
- |
- |
ESH |
≥620 |
≥620 |
- |
- |
Elongation (%) |
O |
≥35 |
≥35 |
≥40 |
≥35 |
1/4H |
≥30 |
≥30 |
≥35 |
≥25 |
1/2H |
≥23 |
≥23 |
≥28 |
≥15 |
3/4H |
≥10 |
≥10 |
- |
- |
H |
- |
- |
- |
- |
EH |
- |
- |
- |
- |
SH |
- |
- |
- |
- |
ESH |
- |
- |
- |
- |
Hardness (Hv) |
O |
- |
- |
- |
- |
1/4H |
75-125 |
75-125 |
75-125 |
85-145 |
1/2H |
85-145 |
85-145 |
85-145 |
105-160 |
3/4H |
95-160 |
95-165 |
≥105 |
≥130 |
H |
105-175 |
105-175 |
- |
- |
EH |
145-195 |
145-195 |
- |
- |
SH |
165-215 |
165-215 |
- |
- |
ESH |
≥180 |
≥180 |
- |
- |