Ductile Iron

ASTM A536

Farmer’s Copper Ltd. maintains an extensive inventory of ductile iron in both 65-45-12 and 80-55-06. Our ductile iron is provided in solid and rectangle bar form. Frequently referred to as ductile cast iron, nodular case iron, spheroidal graphite iron, or SG iron, ductile iron (ASTM a-536) offers superior machinability to any other ferrous material; specifically combined with optimal impact, fatigue, electrical conductivity and magnetic permeability properties.

Ductile Iron vs Grey Iron

Ductile iron is twice as strong as most grey cast irons. The addition of copper and tin can increase tensile and yield strength of ductile iron while nickel, copper or chromium can improve corrosion resistance. Unlike grey irons, graphite in ductile iron is in the form of nodules rather than flakes, enhancing the ductility of the alloy.

Typical Ductile Iron Applications

  • Hydraulic cylinders
  • Manifolds
  • Water & Sewer Pipes
  • Fittings

Ductile Iron is typically composed of variations of carbon, silicon, manganese, magnesium, phosphorus, sulfur and iron. Ductile Iron, particularly pipes, is primarily used for potable water and sewage lines. This metal is also commonly found in automotive components such as gears and industrial applications. Other applications that ductile iron is commonly used in includes machinery, power transmission, transportation, and fluid power. Ductile iron is used to create a variety of pipes, fittings, and castings.

Ductile Iron Pipe

Ductile iron is often used as a pipe as the spheroidal or nodular nature of the graphite that makes ductile iron twice the strength of cast iron. Protective linings and external coatings can be applied to both the internal & external walls of the ductile iron pipes to help prevent corrosion in harsh environments and extend the life of the ductile iron pipe.

Farmer’s Copper Ltd. prides itself on customer satisfactions and has been doing so since 1920. Our knowledgeable is always willing to assist you with your company’s continuous cast, ductile iron needs. Call us at 409-765-9003!

Ductile Iron Properties

(65-45-12)

(80-55-06)

Tensile Strength

65,000 psi

80,000 psi

Yield Strength

45,000 psi

55,000 psi

Elongation, %

12%

6%

Brinell Hardness Range

131/220

187/269

Microstructure, As Cast

Ferritic

Pearlitic

Machinability

Very Good

Good

Heat Treatment

Full Anneal or Normalize

Normalize or Oil Quench and Tempered

 

ASTM Standard Designation for Ductile iron: ASTM A-536

Element

Typical %

Carbon

3.40 – 3.85

Silicon

2.30 – 3.10

Manganese

0.1 – 0.3

Sulphur

.02 Max

Phosphorous

0.1 Max

Balance

Residual

ASTM A-536 Ductile Iron Mechanical Properties

English

Metric

Tensile Strength (Min)

65,000

448

Yield Strength (Min)

45,000

310

Contact one of our sales representatives today
to inquire about a quote from Farmers Copper
or call us today at (800) 231-9450



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