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Reference Tables -- Properties of Gray Cast Iron
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(The American Society for Testing Materials (ASTM) numbering system for grey cast iron is established such that the numbers corespond to the minimum tensile strength in kpsi. Thus an ASTM no. 20 cast iron has a minimum tensile strength of 20 kpsi. Note particularly that the tabulations are typical values. Multiply strength in kpsi be 6.89 to get strength in MPa.)

Properties of Gray Cast Iron
ASTM Number Tensile Strength (Kpsi) Compressive Strength
(Kpsi)
Shear Modulus of Rupture (Kpsi) Modulus of Elasticity (Mpsi) Endurance Limit
(Kpsi)
Brinell Hardness H_b
Tension Torsion
20 22 83 26 9.6-14 3.9-5.6 10 156
25 26 97 32 11.5-14.8 4.6-6.0 11.5 174
30 31 109 40 13.0-16.4 5.6-6.6 14 201
35 36.5 124 48.5 14.5-17.2 5.8-6.9 16 212
40 42.5 140 57 16.0-20 6.4-7.8 18.5 235
50 52.5 164 73 18.8-22.8 7.2-8.0 21.5 262
60 62.5 187.5 88.5 20.4-23.5 7.8-8.5 24.5 302

 

 

 

 

 

 

 

 


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