Gray Iron Components

Gray Iron Components

Vacuum Pump Body Gray Iron Foundry With Several Decades Production Experience Product Description and Process Vacuum Pump Body Gray Iron Foundry With Several Decades Production Experience Production process: Green sand casting process pre-coated sand casting process resin sand casting process...

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Vacuum Pump Body Gray Iron Foundry With Several Decades Production Experience

Product Description and Process

Vacuum Pump Body Gray Iron Foundry With Several Decades Production Experience


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 grey 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.


The Differences Between Ductile Iron and Gray Iron Castings

Gray iron and ductile iron are differentiated by the type and structure of the carbon present in them.  The question, of course, is which one is right for your project?  Before we look at possible answers, let’s examine some of the key differences between the two cast irons.  For a quick summary, scroll down to the bottom of the blog and check out our chart.


Key Differences

Ductility – Ductility is determined by a greater percentage of elongation under tension.  The addition of magnesium in ductile iron means that the graphite has anodular/spherical shape conferring higher strength and ductility as opposed to gray iron which is flake shaped.  For example, 18% elongation can be easily achieved with ASTM A395 and A536 grades 60-40-18 material.

Tensile and Yield Strength – There are certainly differences when it comes to tensile and yield strength of gray and ductile iron.  Ductile iron has a minimum tensile strength of 60,000 psi and minimum yield strength of 40,000 psi.  There are many grades of gray iron as per the ASTM A48 standard.  While gray iron does not have measurable yield strength, the range for tensile strength is 20,000 psi – 60,000 psi.

Impact - Ductile iron has a greater resistance to impacts, and is able to resist a minimum of 7 foot pounds of impact (versus 2 pounds of impact for gray iron).

Thermal Conductivity – Ductile iron has a lower thermal conductivity than gray iron.

Vibration Dampening - Gray iron dampens vibrations more effectively than ductile iron. 

Gray iron can be cast very easily and has good machineability.  It is typically used in the following non-critical applications where strength is not the main required property:

Manhole covers

Counter weights

Machinery bases for vibration dampening

Ductile Iron, because of the increased strength and ductility is used in more engineered applications:

Cable drums

Frames

Gear boxes

Pumps


We have included a chart comparing the two irons across a variety of factors. The checkmark in the appropriate column indicates the better choice between the two.

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