Bone 410

   
ASTM Spec: ASTM D-710, Bone
Military Spec: Mil-F-1148, B-H
NEMA Grade: Bone
Properties
Hardest and densest grade made. Best machining properties and very high resistance to wear and abrasion. Great mechanical strength. This grade is tougher and denser than the commercial grade, but not as well suited to bending.

Applications
Recommended where difficult and extreme machining operations are required. Ideal for noiseless gears, cams, cutting blocks, thrust washers, terminal blocks and railroad joint insulation.

 Thickness Range
0.030″ to 4″
Note – Thickness over 0.093″ is
Laminated Built-Up Fibre.

Color
Grey

Form
Sheet, Roll, Coil, Rod and Tube
Property Thickness (in) Unit ASTM Test Method Typical Value
Density 1/16 gm/cc D-619 1.32
Specific Volume 1/16 cu in/lb   21.0
Tensile Strength

MD

 1/16 psi D-638 19,000

CD

 1/16 psi D-638 9,500
Modulus of Elasticity in Flexural x 10^5

MD

 1/16   D-790 12

CD

 1/16   D-790 8
Modulus of Elasticity in Tension x 10^5

MD

 1/16   D-638 12

CD

 1/16   D-638 8
Flexural Strength

MD

 1/16 psi D-790 28,000

CD

 1/16 psi D-790 16,000
Compressive Strength 1/16 psi D-695 35,000
Impact Strength

MD

 1/16 ft lbs/in D-256 1.4

CD

 1/16 ft lbs/in D-256 1.0
Rockwell Hardness, R Scale 1/16 divisions D-785 100
Bond Strength 1/16 psi D-952 1,500
Dielectric Strength 1/16 volts/mil D-149 200
  1/8 volts/mil D-149 200
Arc Resistance 1/16 sec D-495 100
Comparative Tracking Index* 0.120 volts   400-599
Thermal Conductivity, 149°F   btu/hr/ft 2 /°F/ft C-177 0.168
Specific Heat   btu/lb/°F C-351 0.403
Thermal Expansion x 10^5

MD

   in/in/°F D-696 1.1

CD

   in/in/°F D-696 1.7
Dimensional Change, Thickness   %   1.00

(Per Percent Change MD

   %   0.10

in Moisture Content) CD

   %   0.25
Water Absorption, 24hrs 1/16 % D-570 55
Coefficient of Friction        

Fibre on Fibre

       0.16

Fibre on Smooth Cast Iron

       0.21
Flammability 1/16 in/min D-635 0.5
Flammability, 0.028,0.058,0.120     94HB
Heat Resistance, Continuous*

Electrical

 0.028,0.058,0.120 °C   115

Mechanical

 0.028,0.058,0.120 °C   110
Hot-Wire Ignition* 0.028,0.058 sec   15-29
  0.120 sec   60-119
High-Ampere Arc Ignition* 0.028,0.058,0.120 sec   120+