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Dura-Bar G1 Continuously Cast Gray Iron Bar Stock ASTM A48

Category Metal , Ferrous Metal , Cast Iron , Alloy Cast Iron , Gray Cast Iron
Manufacturer Dura-Bar
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Dura-Bar G1 Continuously Cast Gray Iron Bar Stock ASTM A48.pdf
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Material Notes:
Dura-Bar G1 contains flake graphite in a matrix that is pearlitic with small amounts of ferrite. This is the softest grade of the Dura-Bar gray irons and is normally selected when excellent machinability is desired and the application requires moderate strength, hardness and resistance to wear. Excellent surface finishes can be achieved which is especially significant where lapping is involved. The microstructure will contain Type VII, type A, size 4-6, graphite as defined in ASTM A247. The matrix is pearlite with 5-20% ferrite. The rim will consist of Type D, size 6-8, graphite in a ferrite matrix with small amounts of pearlite. Chill carbides will be less than 5% in any field at 100x and will be well dispersed. Dura-Bar G1 can be oil quench hardened from 1575°F (855°C) to a minimum hardness of 40 Rc on the outside of the bar. The inside diameter hardness will be less than 40 Rc. If quench hardness is critical to the application, G2 Dura-Bar is recommended. Dura-Bar G1 may be ferritize annealed to soften the material to approximately 130 BHN.Composition: Typical chemical composition and ranges, actual values depend on cross section size.Information provided by Dura-Bar.
Physical Properties Metric English Comments
Density 7.20 g/cc
0.260 lb/in³
Mechanical Properties Metric English Comments
Hardness, Brinell 160
160
Average
Tensile Strength, Ultimate 138 MPa
20000 psi
Large bars; Common application load less than 15,000 psi
Modulus of Elasticity 138 GPa
20000 ksi
Compressive Strength 621 MPa
90000 psi
Fatigue Strength 68.9 MPa
10000 psi
Machinability 125 %
125 %
Based on 1212 =100%
Shear Strength 200 MPa
29000 psi
207 MPa
30000 psi
Thermal Properties Metric English Comments
CTE, linear 9.90 µm/m-°C

@Temperature 21.1 - 100 °C
5.50 µin/in-°F

@Temperature 70.0 - 212 °F
Thermal Conductivity 53.33 W/m-K

@Temperature 21.1 - 100 °C
370.1 BTU-in/hr-ft²-°F

@Temperature 70.0 - 212 °F
Component Elements Properties Metric English Comments
Carbon, C 2.6 - 3.75 %
2.6 - 3.75 %
Manganese, Mn 0.30 - 0.65 %
0.30 - 0.65 %
Phosphorous, P <= 0.12 %
<= 0.12 %
Silicon, Si 1.8 - 3.0 %
1.8 - 3.0 %
Sulfur, S <= 0.070 %
<= 0.070 %
Electrical Properties Metric English Comments
Electrical Resistivity 110 ohm-cm
110 ohm-cm
Descriptive Properties Value Comments
Endurance Ratio 0.5
Heat-Treat Response (Rc) 55-60
Relative Damping Capacity 250
Natural log of rate of successive amplitude.
Relative Wear Resistance Fair
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