February 8, 2020

Ductile Iron in DIN 1693

Cast Iron with nodular graphite (GGG) is an iron carbon casting material having the carbon component present as graphite which exists almost exclusively in a largely nodular form. Ductile iron is most popular metal material. www.castingquality.com

Reference Casting Standards:
DIN 1693 part 1: Cast Iron with Nodular Graphite Unalloyed and Low Alloy Grades.
DIN 1693 Part 2: Cast Iron with Nodular Graphite Unalloyed and Low Alloy Grades Properties in Cast on Test Piece

Ductile Iron castings can be produced in Casting Quality Industrial by:

  • Sand Casting
  • Shell Casting
  • Lost Form Casting
  • Centrifugal casting
Cylinder block by Rapid Prototyping Casting

Our Services

  1. Sand Casting

    Casting Quality focus on Metal Parts industry, we provide professional service in Metal Casting field.

    Sand Casting is a popular metal form method, are suitable for all materiel, such as grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum and bronze.

  2. Investment Casting

    also named as precision lost wax casting, mainly suitalbe for carbon steel and stainless steel parts. We also provide grey iron and ductile iron and aluminum and bronze parts by investment casting. It can achieve the best appearance with good tolerance

  3. Shell Casting

    Shell casting method is a good option to replace investment casting and sand casting. the quality is better than sand casting parts, suitable for bulk production.

  4. CNC Machining

    CNC Milling, CNC turning with 5 xix CNC center, we provide precision machining for all castings based on customers design drawings.

  5. CAD Design

    Mechanical Design service based on customers requirement, our software is Solidworks and AutoCAD.

  6. Tools/Mold Design

    Mould design and production will be served for metal casting ad plastic injection industry. Based on our more than 10 years experience, we supply professional molds for our customers in Europe and North American.

Ductile iron standard grades in DIN 1693 Part 1: www.castingquality.com

GradeGuaranteed Properties from separately partsReference data
SymbolMaterial NumberTensile Strength, N/mm2, min0,2% proof Strength, N/mm2, minElongation %, minStructure
GGG-400.704040025015Predominantly Ferritic
GGG-700.70707004402Predominantly pearlitic

Ductile Iron Grades with guaranteed impact values in DIN 1693 Part 1: www.castingquality.com

GradeGuaranteed Properties from separately partsImpact Value (J)
SymbolMaterial NumberTensile Strength, N/mm2, min0,2% proof Strength, N/mm2, minElongation %, minAverage from 3 pcIndividual Value
GGG-35.30.70333502202214 at -40︒C11 at -40︒C
GGG-40.30.70434002501814 at -40︒C11 at -40︒C

 Properties in cast-on test pieces, in DIN 1693 Part 2:

Grade in DIN1693 part 1Ruling Wall thickness of the casting, mmThickness of Cast-on test piece, mmGuaranteed Properties from separately partsReference data
SymbolMaterial NumberTensile Strength, N/mm2, min0,2% proof Strength, N/mm2, minElongation %, minStructure
GGG-40.30.704330-604039025015Predominantly Ferritic
GGG-400.704030-604039025015Predominantly Ferritic
GGG-500.705030-60404503007Ferritic Pearlitic
GGG-600.706030-60406003602Pearlitic Ferritic
GGG-700.707030-60407004002Predominantly pearlitic


 Note: GGG 40.3 also have impact requirement:

Grade in DIN1693 part 1Ruling Wall thickness of the casting, mmThickness of Cast-on test piece, mmImpact Value at -20︒C
SymbolMaterial NumberAverage from 3 piecesIndividual Value
GGG-40.30.704330-604014 J11 J
>60-2007012 J9 J

No any requirement about chemistry in all Standards, but we will suggest the chemistry as our experience in Casting industry:

DIN GradeChinese GradeCSiMnP ≤S≤MgREOthers
GGG70QT700-23.7-4.02.3-2.60.5- 0.15-0.4

Cu 0.4-0.8

GGG80QT800-23.7- 0.039

Cu 0.82

Ductile Iron Heat treatment process: www.castingquality.com
Generally ductile iron will be supplied in casting condition if no special requirement. But to improve iron property, the heat treatment process can be chosen based on different microstructure and final application, such as Annealing, Tempering, Quenching and Normalizing. Pls contact with Casting Quality for details.

Ductile Iron Typical Casting Application

  • GGG40: good weld able property and machining property; it’s the popular iron for machinery, valve, truck, railway, gearbox, flywheels etc.
  • GGG50: better strength, mostly used in engineer, , railway, motor etc.
  • GGG60: little better abrasive property.
  • GGG70/GGG80: high strength and abrasive property. It will be used in high strength application.

Similar Ductile Iron Casting Grades: www.castingquality.com

IndexCountryDuctile Iron Grade



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