ASTM class 25 Standard gray iron test bars, as cast

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ASTM class 25 Standard gray iron test bars, as cast
Categories:	Metal; Ferrous Metal; Cast Iron; Gray Cast Iron
Material Notes:	987 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	174	174
Hardness, Knoop	193	193	Converted from Brinell
Hardness, Vickers	181	181	Approximated. Converted from Brinell hardness.
Tensile Strength, Ultimate	179 MPa	26000 psi
Modulus of Elasticity	79.0 - 102 GPa	11500 - 14800 ksi
Ultimate Compressive Strength	669 MPa	97000 psi
Poissons Ratio	0.29	0.29	Calculated
Fatigue Strength	79.0 MPa	11500 psi	Reversed bending fatigue limit
Shear Modulus	32.0 - 41.0 GPa	4640 - 5950 ksi
Shear Strength	220 MPa	31900 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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Overview of materials for Gray Cast Iron

MCFE11 / 10405

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