Gray Cast Iron Parts

Gray Cast Iron Parts

Gray And Ductile Iron Foundry Sand Molding Castings Export Parts Plates Product Description and Process Gray And Ductile Iron Foundry Sand Molding Castings Export Parts Plates Production process: Green sand casting process pre-coated sand casting process resin sand casting process Weight range:...

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Gray And Ductile Iron Foundry Sand Molding Castings Export Parts Plates  

Product Description and Process

Gray And Ductile Iron Foundry Sand Molding Castings Export Parts Plates


Production process:

Green sand casting process

pre-coated sand casting process

resin sand casting process

Weight range: from 50 gram to 5,000 kilograms for ductile iron casting product


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.


Why the grey iron casting is popular?

The popularity of grey cast iron components is because grey iron is one of the cheapest types of iron castings to produce.  It has acceptable ductility, tensile strength, yield strength, and impact resistance for most applications.  Grey Iron is also excellent in its ability to dampen vibrations making it ideal for machinery bases and as well as many housing applications.  Grey iron has high thermal conductivity meaning it moves heat more easily through the metal.

A final benefit of grey iron is its ability to withstand thermal cycling well.  Thermal cycling is where the component goes back and forth between warmer and colder temperatures.  While thermal cycling can create stress and premature failure in some types of metal castings, grey iron has proven to endure the strain of thermal cycling quite well and not stress as easily.

While grey cast iron has less tensile strength and shock resistance than most other castings or even steal, it has compressive strength that is comparable to low- and medium-carbon steel. These mechanical properties are controlled by the size and shape of the graphite flakes present in the microstructure.


Grey Iron Castings’other mechanical property

Grade

Compressive Strength

σbc/MPa

Shearing Strength

τb/Mpa

Impact Testing

αKV/(J/cm2)

Safe Range of stress

σ-1/MPa

Modulus of Elasticity

Ε/GPa

HT150

500~700

150~250

60~90

70~90

HT200

600~800

200~300

2~5

80~90

80~110

HT250

800~1000

250~350

4~8

100~140

100~130

HT300

1000~1200

300~450

7~10

120~160

120~140

HT350

1100~1300

350~500

9~11

140~180

130~160


Grey Iron Castings Hardness

Gray Iron Grade

Hardness Grade

Hardness Range

HB

Metallography

HT100

H145

≤170

Ferrite

HT150

H175

150~200

Ferrite + Pearlite

HT200

H195

170~220

Pearlite

HT250

H215

190~240

Pearlite

HT300

H235

210~260

Pearlite(Inoculated Cast Iron)

HT350

H255

230~280

Pearlite(Inoculated Cast Iron)


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