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CLASSIFICATION SPEC NOTE
Modulus of Elasticity (Young`s) 7.2 X 10 Pa 10.4 X 10 psi
Modulus of Rigidity (Shear) 3.0 X 10 Pa 4.3 X 10 psi
Bulk Modulus 4.0 X 10 Pa 6.18 X 10 psi
Poisson`s Ration 0.23
Specific Gravity 2.53
Density 2530kg/§³ 158lb/ft
Coefficient of Thermal Stress 0.62mPa/¡É 50psi/¢µ
Thermal Conducyivity 0.937 W.m/§³¡É 6.5btu.in/hr.¢µ.ft
Specific Heat 0.21  
Coefficient of Linear Expansion 8.9 X 10 strain/¡É 4.9 X 10 strain/¢µ
Hardness(Moh` Scale) 5 to 6
Refrective index (Sodium D Line) 1.523
1§­ 1.511
2§­ 1.499
Softening Point 1340¢µ(726¡É)
Annealing Point 1015¢µ(546¡É)
Strain Point 957¢µ(514¡É)
Emissivity(Hemispherical) at 75¢µ 0.84

 

 
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