Foundry

Ductile Iron and ADI + see more

Farrar Corporation has exclusively poured all grades of ASTM A536 Ductile Iron in our green sand foundry since 1967. We specialize in castings that range in size from 2lbs to 75lbs and in production runs of 100 to 100,000.

Farrar is nationally recognized as a producer of top quality Austempered Ductile Iron (ADI) as well as standard grades of ductile iron. All castings are date coded for traceability and we are happy to supply certification of microstructure, chemistry, and physical properties of our castings.

Ductile iron is often an economical alternative to replace steel fabrications or cast iron with increased strength, improved performance, reduced cost, and better looking parts. The wide range of physical properties available as-cast and heat treated make it the ideal material for a wide variety of applications.

Capabilities include:

  • Casting Design Assistance
  • Pattern Design and Fabrication
  • Shell & Isocure Core Making
  • Casting Production up to 75lbs (20"x24" flask size)
  • Heat Treatment (Anneal or Austemper)
  • CNC Grinding
  • CNC Machining
  • Assembly & Painting
  • EAU's from 500 to 300,000

DUCTILE IRON ASTM A536-84
Grade 60-40-18 65-45-12 80-55-06 100-70-03 120-90-02
Tensile - Min. 60,000 PSI
448 MPa
65,000 PSI
448 MPa
80,000 PSI
552 MPa
100,000 PSI
689 MPa
120,000 PSI
827 MPa
Yield - Min. 40,000 PSI
276 MPa
45,000 PSI
310 MPa
55,000 PSI
379 MPa
70,000 PSI
483 MPa
90,000 PSI
621 MPa
Elongation 18% 12% 6% 3% 2%
BHN 180 Max 156-217 187-255 241-302 As Specified

Pattern Shop + see more

Our pattern shop combines years of experience with the latest computer technology to produce high quality and complex patterns and core boxes. A computerized solid model of your casting is created in SolidWorks and is used to produce master patterns, machine programs, and solidification analysis to identify and eliminate problems before the part goes to the foundry. Customer patterns are stored in a separate building from the foundry so that each pattern can be insured. Each pattern is inspected, repaired, and stored in a location that is catalogued in the computer system for easy retrieval.

Heat Treatment + see more

Heat treating of ductile iron is a Farrar specialty. Our level of automation and mechanization results in both better precision and reduced costs for you. We offer heat treatment services including annealing and austempering

Annealing

Annealing of ductile iron is used to reach a softer material condition which improves the machinability of the cast material. Our annealing system consists of three heat treat furnaces, one chiller, and a shot blast tank that are all controlled and operated by a fully automated system.

Austempered Ductile Iron

Austempered Ductile Iron (ADI) offers the best combination of low costs, design flexibility, good machinability, high strength-to-weight ratio, good wear resistance and toughness, and excellent fatigue strength. ADI offers this superior combination of properties because it has all the advantages of a ductile iron casting plus mechanical properties that are superior to all cast irons and most steel products as a result of a specialized heat treat process.

Properties of Austempered Ductile Iron:

  • STRENGTH equal to or greater than most steel
  • ELONGATION equal to cast iron with double the strength
  • WEAR RESISTANCE better than austempered steel, Q&T steel, or Q&T ductile iron
  • TOUGHNESS better than ductile iron and equal to or better than cast and forged steel
  • DENSITY: ADI .26#/in3. Steel .28#/in3
  • FATIGUE STRENGTH that is equal to or better than steel and increases with machining after heat treatment.
  • DAMPING is 5 times greater than steel

AUSTEMPERED DUCTILE IRON ASTM A897M-06
Grade 750
900
(1)
1050
(2)
1200
(3)
1400
(4)
1600
(5)
Tensile
Strength
(MPa /
KSI)
750 /
110
900 /
130
1050 /
150
1200 /
175
1400 /
200
1600 /
230
Yield
Strength
(MPa /
KSI)
500 /
70
650 /
90
750 /
110
850 /
125
1100 /
155
1300 /
185
Elongation
(%)
11 9 7 4 2 1
Impact
Energy
(FT-LB)
80
75
60
45
25 15
Typical Hardness
(HBW)
241-302 269-341
302-375
341-444
388-477 402-512
Our green sand foundry has exclusively poured all grades of ASTM A536 Ductile Iron since 1967.
We print molds & cores directly from CAD for prototypes with the shortest lead times!
Farrar's internal capabilities of a foundry, machine shop, and heat treat facility give it the unique ...
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785.537.7733

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