Ductile Iron GGG60

Ductile Iron GGG60

Ductile Cast Iron Material GGG60 Grade OEM Castings Production & Machining Product Description and Process Ductile Cast Iron Material GGG60 Grade OEM Castings Production & Machining Production process includes: green sand casting process pre-coated sand casting process resin sand casting...

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Ductile Cast Iron Material GGG60 Grade OEM Castings Production & Machining

Product Description and Process

Ductile Cast Iron Material GGG60 Grade OEM Castings Production & Machining


Production process includes:

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


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.


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? 


Key Differences

A. Ductility – Ductility is determined by a greater percentage of elongation under tension.  The addition of magnesium in ductile iron means that the graphite has a nodular/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.

B. 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 a 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 a measurable yield strength, the range for tensile strength is 20,000 psi – 60,000 psi.

C. 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).

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

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


Ductile Iron Grade Chart

GB/T 1348 1998 (China)

Grade

Tensile strength

σb≥/MPa

Yield strength

σ0.2≥/MPa

Elongation

δ5≥(%)

Hardness

HBS

QT400-18

QT400-18-LT*

400

250

18

130~180

QT400-15

400

250

15

130~180

QT450-10

450

310

10

160~210

QT500-7

500

320

7

170~230

QT600-3

600

370

3

190~270

QT700-2

700

420

2

225~305

QT800-2

800

480

2

245~335

QT900-2

900

600

2

280~360

*Low temperature V notch impact tested (-20±2℃) 


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