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Ductile Iron Data Sheet ASTM A536 65-45-12

Posted by admin on February 10, 2016

Ductile Iron ASTM A536

Ductile Iron ASTM A536 Grade 65-45-12   (Related Standards-SAE J434C D4512; ISO 1083 400-12)

ASTM A536 65-45-12 is a nodular Iron with a ferritic and pearlitic microstructure and mechanical properties comparable to low alloy steels.  Ductile iron 65-45-12 is one grade in a family of many.  Chemistry requirements are not specified in the ASTM A536 standard. Chemistry and hardness listed in this spec would be typical for a Grade 65-45-12.

Composition

 

C

Mn

Si

Cr

Ni

Cu

Mg

Min%

3.4

 

2.35

 

 

 

0.025

Max%

3.8

0.4

2.75

0.08

0.5

0.4

0.055


Physical and Mechanical Properties

UTS

65000

TS

45000

%Elongation

12%

Hardness

 

Density lb/in3 (g/cm3)

0.256(7.1)

Thermal Conductivity   Btu/hr·ft·F (W/m·K)

250(36) for Ferritic grades, will change with an increase in pearlite, approx. 20% less

Specific Heat at 70F  Btu/lb·F (J/Kg·k)

0.110(461)

Coefficient of Thermal Expansion Ɛ/F(Ɛ/C)X106 average between 68-212F

6.4 (11.5)

Melting Temperature (F)

2100 F

Compressive Strength Ksi (MPa)

429 (2960)


Impact Properties
Ductile Iron impact properties are microstructure dependent.  If charpy impact testing is required for the engineering design, consider using a fully ferritic ductile iron grade with a higher % elongation.  The ISO 1083 standard specifies charpy values for low temperature applications.Ductile iron PC pump gear box and lid.

The Ductile Iron Advantage
Ductile Iron can be easily cast and machined.  Ductile has great vibration damping and corrosion resistance properties.  Ductile Iron has a great strength to weight ratio.  Finally Ductile Iron can be made for a much lower cost than steel.  One of the reasons for this lower cost can be attributed to the gross material being used is less for casting ductile iron vs steel. 

When considering a conversion from a fabrication to a casting consider using ductile iron for the reasons listed above: castability, machining, close to steel strengths and costs.

Applications

  • Brakes
  • Gear boxes 
  • Frames 
  • Oil and gas parts
  • Pumping parts
  • Compressor parts
  • Mining parts, winch parts
  • Wind Energy and other applications

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