What is Ductile Iron

What is Ductile Iron?

  Ductile iron is a kind of high-strength cast iron material developed in the 1950s. Ductile iron exhibits high strength, flexibility, durability and elasticity due to their unique micro-structure. Its mechanical properties are similar to steel, and far exceed those of standard cast irons.Its comprehensive performance is close to that of steel.

  It is based on its excellent performance and has been successfully used to cast some casting parts with high stress, high strength, toughness and wear resistance.

Ductile iron has rapidly developed into a widely used cast iron material after gray cast iron. The so-called “iron-based steel” mainly refers to ductile iron. Ductile Iron is also called ductile cast iron, spheroidal graphite cast iron, or nodular cast iron

  The graphite and carbon contained in cast iron occur as flakes; cast iron exhibits positive compressive load capabilities, but tensile loading above its natural tensile strength can cause cracks to form and propagate rapidly out from stress points within the flaked graphite micro structure. As a result, cast iron has virtually no elongation. It is a brittle material, and therefore limited in its use in tensile and shock loading applications.

  The graphite within ductile iron occurs as spheroids, so it is sometimes referred to as spheroidal graphite. Similarly, the term nodular iron stems from the fact that the carbon contained in ductile iron is held in the form of nodules. This unique micro-structure causes ductile iron to withstand bending and shock loading far better than traditional cast iron.

Iron CarbonSiliconManganeseMagnesiumPhosphorusSulfurCopper
~94%2 – 3.60%2.2 – 2.8%0.1 – 0.2%0.03 – 0.04%0.005 – 0.04%0.005 – 0.02%<= 0.40%


  • To improve the strength of ductile iron, additional tin or copper can be added.
  • To improve corrosion resistance, copper, nickel, or chromium can replace anywhere from 15-30% of the iron.

Ductile Iron Advantages

  • Ductile iron can be easily cast and machined.
  • Excellent strength to weight ratio.
  • Ductile iron can be made for a much lower cost than steel.
  • Superior castability and machinability.
  • Ductile iron provides a designer with an exceptional combination of toughness, low cost manufacturing, and reliability.

Ductile Iron Applications

Automotive components  Gears and Gear Boxes pump housings
Idler arms  Housings and manifolds Machine Tooling
Connecting rods (like in engines) Crankshafts Large Machines
Wheel hubs Valves (especially high-pressure valves) Axles
Spindle supports Steering knuckles Suspension system parts

What is the difference between Ductile Iron and Cast Iron?

  Cast iron refers to all iron parts that are cast and have a high carbon content, but in normal usage. Cast iron refers to gray iron, the cast parts with weaker iron structures containing graphite flakes. Ductile iron must specifically have the spherical graphite structure in the metal.

  Regular cast iron can be cast cheaply, machined very easily, and strength can be added through heat treating. Gray iron lacks the strength and durability of ductile cast iron. Ductile iron castings are not much more expensive than gray iron castings. If there is no need for the benefits of ductile iron you should probably stick with the gray iron castings.

《What is Ductile Iron》有189条留言

  1. I’m the proprietor of JustCBD label (justcbdstore.com) and am looking to grow my wholesale side of business. I really hope that someone at targetdomain is able to provide some guidance . I considered that the best way to accomplish this would be to reach out to vape companies and cbd stores. I was hoping if someone could recommend a qualified site where I can purchase CBD Shops B2B Data I am presently examining creativebeartech.com, theeliquidboutique.co.uk and wowitloveithaveit.com. Not exactly sure which one would be the most ideal solution and would appreciate any guidance on this. Or would it be much simpler for me to scrape my own leads? Ideas?

  2. After I originally left a comment I seem to have clicked the -Notify me when new comments are added- checkbox and from now on each time a comment is added I get 4 emails with the same comment. There has to be a way you are able to remove me from that service? Appreciate it!

  3. Oh my goodness! Incredible article dude! Thank you, However I am experiencing problems with your RSS. I don’t know why I cannot subscribe to it. Is there anyone else getting identical RSS issues? Anybody who knows the answer will you kindly respond? Thanks!!

  4. I really love your website.. Great colors & theme. Did you build this website yourself? Please reply back as I’m hoping to create my own personal blog and want to find out where you got this from or just what the theme is named. Many thanks!

  5. Spot on with this write-up, I absolutely believe that this site needs a lot more attention. I’ll probably be returning to read through more, thanks for the info!

  6. unsecured personal loan low rate i need loan fast i need a loan unsecured lender loan definition. local auto finance companies quick loan qatar, unsecured personal loans direct lenders. unsecured loan lowest interest rate get a loan fast 4000 950_562 unsecured loans india, how to record loan in balance sheet, unsecured loans california. personal loan kya hota hai in hindi unsecured low credit loans, personal loans bad credit direct lender uk online payday loans no credit check california. apply for a payday loan online with direct lender personal loans goldman sachs, unsecured business loans for bad credit unsecured business loans in coimbatore.