Yeah they are quite heavy, I didn't have time to drill them hollow at work. But they're aerospace grade AB... still heavy as hell though haha
1. Description
Nickel aluminium bronze alloy possessing a good combination of corrosion and
oxidation resistance coupled with high strength and wear resistance.
2. Related Specifications
BS 2872/4 CA104M
DTD197A
BS B 23, BS 2B 23,
EN 12163/5/7 CW307G
DIN 17665/17672 CuAl10Ni5Fe4, WN 2.0966
3. Nominal Composition
Element Cu Al Ni Fe Mn
Nominal
Composition % Bal 10.0 4.9 4.7 0.3
4. Typical Mechanical Properties
Condition Typical
Size Range
(mm)
0.2% Proof
Rp0,2
(MPa )
UTS
Rm
(MPa)
Elongation
5.65?So
(%)
Hardness
(HB)
Extruded & Drawn 10 – 75 370 – 600 740 – 850 12 – 20 195 – 255
Rolled 50 – 175 320 – 500 700 – 800 15 – 25 180 – 240
Forged >175 320 – 500 700 – 800 15 – 25 180 - 240
5. Physical Properties
Young’s Modulus 125 GPa
Density 7.6 g/cm3
Melting Range 1060 – 1075 oC
Coefficient of Expansion (20 – 300oC) 17 ✙m/m oC
Thermal Conductivity 46 W/m K
Electrical Conductivity 8 % IACS
Electrical Resistivity 0.216 ?Ωm
Relative Magnetic Permeability 1.5
Specific Heat 375 J/kg K
6. Fabrication
Machinability Index: 40 Cold Working: Poor
Hot Working: Good Hot Working Range: 800 – 925oC
