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Dura-Bar 80-55-06 Continuously Cast Ductile Iron Bar Stock ASTM A536

Category Metal , Ferrous Metal , Cast Iron , Alloy Cast Iron , Ductile Iron
Manufacturer Dura-Bar
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Dura-Bar 80-55-06 Continuously Cast Ductile Iron Bar Stock ASTM A536.pdf
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Material Notes:
Continuously cast ductile iron bar stock is produced in a wide variety of sizes and shapes, including rounds, rectangles and special shape cross sections.It often is used as a direct replacement for plain carbon steel and can offer dramatic cost reductions for parts that require a lot of machining. The machinability rating of ductile iron bar stock will be similar to free machining carbon steel grades, such as 12L14, 11L17, 86L20, 1141 and 1144, and achievable machining speeds will be significantly higher.Ductile iron contains graphite in the form of very small, round nodules that give the material free machining properties without the addition of lead, bismuth, sulfur or phosphorus.The continuous casting process eliminates typical foundry defects, such as gas holes, hard spots, slag inclusions and inconsistent properties, that result from different molding methods. Bars are cast through a water-cooled graphite die mounted on the bottom of a large bar machine crucible. The ferrostatic head pressure created by the molten metal in the bar machine crucible forces iron into the die, producing a very fine-grained microstructure. The outer “rim” is the only part of the bar that is solid when it exits the die. The core is molten iron. Heat from the molten iron core reheats the rapidly chilled outer skin, producing a homogenized microstructure that is cooled to room temperature in still air.Ductile iron bar stock consists of a microstructure that is made up of graphite nodules in a solid metal matrix. The solid metal matrix will be similar to the matrix structure in carbon steel bars, and the amount of combined carbon determines the mechanical and physical properties of each grade.The 80-55-06 ductile iron grade has a ferritic/pearlitic matrix. The mechanical properties of 80-55-06 will be similar to medium carbon steels that contain up to 0.50% carbon including 1040, 1045, 1141, and 1144. All grades of ductile iron bar stock respond very well to conventional heat-treating methods.Composition: Typical chemical composition and ranges, actual values depend on cross section size.Information provided by Dura-Bar
Physical Properties Metric English Comments
Density 6.64 - 7.20 g/cc
0.240 - 0.260 lb/in³
Approximately 10% lighter than carbon steel
Mechanical Properties Metric English Comments
Hardness, Brinell 187 - 255
187 - 255
Depends on cast section size and location of test
Tensile Strength, Ultimate 586 MPa
85000 psi
Typical
Tensile Strength, Yield 400 MPa
58000 psi
Typical
Elongation at Break 9.0 %
9.0 %
Typical
Reduction of Area 3.0 %
3.0 %
Tensile Modulus 172 GPa
25000 ksi
Typical
Compressive Yield Strength >= 455 MPa
>= 66000 psi
Compressive yield will be 1.2 times the tensile yield
Poissons Ratio 0.275
0.275
Generally accepted value
Fatigue Strength 276 MPa

@# of Cycles 1.00e+8
40000 psi

@# of Cycles 1.00e+8
rotating beam
Shear Modulus 67.6 GPa
9800 ksi
calculated
Shear Strength 496 MPa
72000 psi
Shear strength is 90% of tensile strength for all ductile iron grades
Charpy Impact 20.3 J

@Temperature 23.0 °C
15.0 ft-lb

@Temperature 73.4 °F
Thermal Properties Metric English Comments
CTE, linear 11.0 µm/m-°C

@Temperature 21.0 - 100 °C
6.11 µin/in-°F

@Temperature 69.8 - 212 °F
Mean
11.9 µm/m-°C

@Temperature 21.0 - 300 °C
6.61 µin/in-°F

@Temperature 69.8 - 572 °F
Mean
13.4 µm/m-°C

@Temperature 21.0 - 500 °C
7.44 µin/in-°F

@Temperature 69.8 - 932 °F
Mean
13.7 µm/m-°C

@Temperature 21.0 - 900 °C
7.61 µin/in-°F

@Temperature 69.8 - 1650 °F
Mean
Specific Heat Capacity 0.506 J/g-°C
0.121 BTU/lb-°F
Thermal Conductivity 24.2 W/m-K
168 BTU-in/hr-ft²-°F
Melting Point 1120 °C
2050 °F
Eutectic temp
Maximum Service Temperature, Air 649 °C
1200 °F
Minimum Service Temperature, Air -30.0 °C
-22.0 °F
Component Elements Properties Metric English Comments
Carbon, C 3.5 - 3.9 %
3.5 - 3.9 %
Chromium, Cr <= 0.050 %
<= 0.050 %
Copper, Cu 0.050 - 0.50 %
0.050 - 0.50 %
Iron, Fe 95 %
95 %
Manganese, Mn 0.15 - 0.35 %
0.15 - 0.35 %
Phosphorous, P <= 0.050 %
<= 0.050 %
Silicon, Si 2.25 - 2.75 %
2.25 - 2.75 %
Sulfur, S 0.010 - 0.025 %
0.010 - 0.025 %
Tin, Sn 0.050 - 0.10 %
0.050 - 0.10 %
Electrical Properties Metric English Comments
Volume Resistivity 0.0000055 ohm-cm
0.0000055 ohm-cm
At 2.50% Silicon
Magnetic Permeability 350 - 550
350 - 550
25 Oersteds, Medium hysteresis loss
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