ASTM class 20 Standard gray iron test bars, as cast

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ASTM class 20 Standard gray iron test bars, as cast
Categories:	Metal; Ferrous Metal; Cast Iron; Gray Cast Iron
Material Notes:	839 kg transverse load on test bar.
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Physical Properties	Metric	English	Comments

Density	7.15 g/cc	0.258 lb/in³	Typical for Gray Cast Iron

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	156	156
Hardness, Knoop	173	173	Converted from Brinell
Hardness, Vickers	161	161	Approximated. Converted from Brinell hardness.
Tensile Strength, Ultimate	152 MPa	22000 psi
Modulus of Elasticity	66.0 - 97.0 GPa	9570 - 14100 ksi
Ultimate Compressive Strength	572 MPa	83000 psi
Poissons Ratio	0.29	0.29	Calculated
Fatigue Strength	69.0 MPa	10000 psi	Reversed bending fatigue limit
Shear Modulus	27.0 - 39.0 GPa	3920 - 5660 ksi
Shear Strength	179 MPa	26000 psi	Torsional shear strength.

Component Elements Properties	Metric	English	Comments
Carbon, C	3.25 - 3.5 %	3.25 - 3.5 %
Chromium, Cr	0.050 - 0.45 %	0.050 - 0.45 %
Copper, Cu	0.15 - 0.40 %	0.15 - 0.40 %
Iron, Fe	91.9 - 94.2 %	91.9 - 94.2 %	As Balance
Manganese, Mn	0.50 - 0.90 %	0.50 - 0.90 %
Molybdenum, Mo	0.050 - 0.10 %	0.050 - 0.10 %
Nickel, Ni	0.050 - 0.20 %	0.050 - 0.20 %
Phosphorus, P	<= 0.12 %	<= 0.12 %
Silicon, Si	1.8 - 2.3 %	1.8 - 2.3 %
Sulfur, S	<= 0.15 %	<= 0.15 %

References for this datasheet.

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