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Ductile Iron Casting ASTM A536
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product: view count: 291Ductile Iron Casting ASTM A536 
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last update: 2018-07-03 21:10
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Ductile Iron Casting ASTM A356 Grade Material Green Sand Casting Housing Parts

Product Description and Process

Ductile Iron Casting ASTM A356 Grade Material Green Sand Casting Housing Parts


Production process:

green sand casting process

pre-coated sand casting process

resin sand casting process

Weight range: from 50 gram to 2,000 kilograms for ductile iron casting product


Sand mould production:

Automatic moulding machine

Z145 moulding machine

Z146 moulding machine

Z148 moulding machine

Handwork moulding, though most parts can achieve the moulding by machine, for some complex structure parts, the hand moulding is still needed.


Machining process:

CNC machine, machining center, lathe, mill machine, drill machine, etc.


Surface treatment process:

paint coating, electrophoretic paint coating, electrogalvanizing coating, black oxide coating, phosphate treatment,  powder coating, etc.


Product Material and Uses

Normally production with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, 100-70-03, etc.

The ductile iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.


Advantages of Ductile Iron Castings

There are several advantages that ductile iron provides designers:

1. Ductile iron can be easily cast and machined.

2. It has an excellent strength to weight ratio.

3. Ductile iron can be made for a much lower cost than steel.

4. It has superior castability and machinability.

5. Ductile iron provides a designer with an exceptional combination of toughness, low cost manufacturing, and reliability.


Properties of Ductile Iron

To create different grades of ductile iron, one must control the matrix structure around the graphite during the casting process or through subsequent heat treatment. The minor compositional differences between the different grades of ductile iron exist in order to create the desired matrix (microstructures).

Ductile iron can be considered as steel with graphite spheroids dispersed throughout its matrix. The qualities of the metallic matrix in which the graphite spheroids are suspended have a significant effect on ductile iron’s properties, but the graphite spheroids themselves do not.


There are several matrices found within ductile iron, the most common being

Ferrite – a pure, ductile, flexible iron with little strength. This matrix has poor wear resistance, but high impact resistance and good machinability.

Pearlite – a mechanical mixture of ferrite and iron carbide (Fe3C). It is relatively hard, with moderate ductility. It has high strength, good wear resistance, moderate impact resistance, and good machinability.

Pearlite/Ferrite – a structure consisting of a mixture pearlite and ferrite, and the most common matrix for commercial grades of ductile iron.


Common Ductile Iron Grades

While there are many different ductile iron specifications, foundries routinely offer 3 common grades;

Physical and Mechanical Properties

ASTM A536,

Grade 60-40-18

ASTM A536,

Grade 65-45-12

ASTM A536,

Grade 80-55-06

Tensile Strength, min, psi

60,000

65,000

80,000

Tensile Strength, min, MPa

414

448

552

Yield Strength, min, psi

40,000

45,000

55,000

Yield Strength, min, MPa

276

310

379

Elongation in 2 in. or 50 mm, min %

18

12

6

Density lb/in3

0.256

0.256

0.256

Density g/cm3

7.1

7.1

7.1

Melting Temperature (Degrees F)

2,100 – 2,190

2,100 – 2,190

2,100 – 2,190

Melting Temperature (Degrees C)

1,150 - 1,200

1,150 - 1,200

1,150 - 1,200

Compressive Strength Ksi

429

429

429

Compressive Strength MPa

2960

2960

2960

UNS

F32800

F33100

F33800


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