Ductile Iron Castings
We represent the best ductile iron foundries in the USA and back it up with professional and ongoing service.

Supplier Of The Following Ductile Iron Grades:
ASTM A536 Ductile Iron D-4512
Ductile Iron 60-40-18 Ductile Iron D-5506
Ductile Iron 65-45-12 Ductile Iron D-7003
Ductile Iron 80-55-06 Ductile Iron D-4018
Ductile Iron 100-70-03 (Additional Grades)
Ductile Iron SAE J434



Ductile Castings Gallery
Conveyor Component 4lbs.
Crankshaft 3lbs.
Gear Housing 15lbs.
Handel 2lbs.
Link Pin 4lbs.
Pillow Block 6lbs.
Piston Cover 2lbs.
Shaft and Hub Assembly 9lbs.
Shift Fork 1lbs.
Adjuster Collar 8lbs.
Brake Spider 14lbs.
Connection 5lbs.


Why Call Carson Castings for a Quote?
1. Expertise in our field
We deal strictly in the sourcing of castings and machined castings. Highly specialized in ductile iron.
2. Added Value
We can provide raw castings or complete assemblies and everything in between (painting, heat treat and machining).
3. Tooling Options
No-bake and green sand molding. Floor, manual, squeezer, cope and drag, Hunter, Sinto and Disa molding processes.
4. Industry Knowledge
Our years of experience in the casting field ensure we place your work at a facility suited to your project’s unique needs.

5. States We Serve

  • Nebraska
  • Kansas
  • Oklahoma
  • Minnesota
  • Iowa
  • Missouri
  • Wisconsin
  • Illinois
  • Indiana
  • Kentucky
  • Michigan
  • Ohio
  • Pennsylvania
  • North Carolina
  • Virginia
  • West Virginia

Inside view of melting furnace control room at a casting foundry
Inside view of melting
furnace control room at one of
Carson Casting's network foundry.

Ductile Iron Specifications
ASTM A536-84
Grade Min. Tensile psi Min. Yield psi % Elongation Heat Treatment
60-40-18 60,000 40,000 18 May require a full anneal
65-45-12 65,000 45,000 12 N/A
80-55-06 80,000 55,000 6 N/A
100-70-03 100,000 70,000 3 Usually normalized
SAE J434
Grade Brinell Hardness Number of Casting Heat Treatment
D-4018 170 Max. May be annealed
D-4512 156-217 N/A
D-5506 187-255 N/A
D-7003 241-302 May be normalized

Characteristics of Ductile Iron

Characteristics of Ductile Iron

1. Ductile iron castings offer a wide range of mechanical properties:
The ductile iron family offers the designer and engineer a unique combination of strength, wear resistance, fatigue resistance, and toughness, as well as excellent ductility characteristics.

Tensile Strength:
The tensile strength of ductile iron begins where gray iron stops. The as-cast tensile strength of ductile iron ranges from 60,000 to 100,000 psi

Yield Strength:
The yield strength of A395 ductile iron is a minimum of 40,000 psi. This is higher than grades 70-36 and 60-30 cast steel or ordinary gray iron (which has no true yield strength)

Ductile iron is one of the most ductile of all cast irons and shows 18% to 30% elongation on a test piece.


2. Ductile iron castings are economical:

Ductile iron castings are a cost effective substitute for carbon and low alloy steels, and in some applications, ductile iron can even outperform steel. Ductile iron is less brittle than most types of iron. Several grades can be used in the as-cast condition without additional heat treatments. When heat treated ductile iron’s design flexibility can be enhanced to an even greater degree.

3. Ductile iron castings outperform cast steels and gray iron in many applications:

The improved mechanical properties of ductile iron increase its resistance to breakage from physical load, or mechanical and thermal shock far above that of gray iron. Its wear resistance is comparable to some of the best grades of steel and superior to gray iron in heavy load or impact load situations. It is considerably less expensive than cast steel and only moderately more expensive than gray iron. Its high yield strength and ductility make it an economical choice for many applications.

4.Ductile iron castings are readily available:

Unlike cast steel, ductile iron capacity in North America is abundant. This ensures the end user that production lead-times are reasonable and that a variety of suppliers are capable of producing their product.


  Standard Specifications Characteristics Applications
Ductile Iron • ASTM A395 & ASME SA395: ferritic ductile iron pressure-retaining castings for
use at elevated temperatures
• ASTM A439: austenitic ductile iron castings
• ASTM A476 & ASME SA476: ductile iron castings for paper mill dryer rolls
• ASTM A536 & SAE J434: ductile iron castings
• ASTM A571 & ASME SA571: austenitic ductile iron castings for
pressure-containing parts suitable for low-temperature service
• ASTM A874: ferritic ductile iron castings suitable for low-temperature service
• ASTM A897: austempered ductile iron castings
Several grades for both
strength & ductility; high
strength, ductility & wear
resistance; contact fatigue
resistance; ability to
withstand thermal cycling;
and production of fracturecritical
Steering knuckles; plow
shares; gears; automotive &
truck suspension components;
brake components; valves;
pumps; linkages; hydraulic
components; and wind
turbine housings.

Ductile Castings Gallery
Conveyor Component 4lbs.
Crankshaft 3lbs.
Gear Housing 15lbs.
Handel 2lbs.
Link Pin 4lbs.
Pillow Block 6lbs.
Piston Cover 2lbs.
Shaft and Hub Assembly 9lbs.
Shift Fork 1lbs.
Adjuster Collar 8lbs.
Brake Spider 14lbs.
Connection 5lbs.

Ductile iron, a family of versatile cast irons, offers the design engineer versatility. Its mechanical properties – strength, wear resistance, fatigue strength, toughness and ductility - are competitive with many cast, forged, and fabricated steel products, yet the result, in most cases, is lower cost and better looking parts.

Ductile iron’s ease of maching and economy of production are almost equal to gray iron. The use of ductile iron has grown rapidly in the past 40 years, mainly through conversions from gray and malleable iron castings, steel castings, forgings and fabrications, and also through its use in new components designed with ductile iron.

Learn More About Nodular Iron Castings->


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