As strong as cast iron but lighter?

[Photon713]

Good Evening, all...

Trying to find a metal for casting that has a density slightly lighter than iron (.28 lbs per
cubic inch). I'm looking for a material that is as strong as cast iron, but, reduces the weight of the cast item by 10%. Secondly, the cost and availability should be approximately equal to cast iron. I have had a recommendation to use ZA12, but, not finding many companies casting this alloy. Any suggestions greatly appreciated. If you recommend a metal, could you also identify any company casting it. Thanks

 

[Astronuc]

Fe has a density of 7874 kg/m³. So 10% less would be about 7100 kg/m³. Zn has a density of about 7140 kg/m³, but it may not be as strong as iron.

On the other side would be Cr with a density 7140 kg/m³, and this could be alloyed with Fe, Ni, Mo, V. Cr-Mo alloys exist but the Mo has a density of ~10280 kg/m³, but this could be offset with additions of V(dens = 6110 kg/m³).

Steels can be cast also. Cast iron is relatively high carbon iron and is therefore can be brittle.

 

[oswaler]

Good evening, it sounds like you are looking for a material that has a high strength-to-weight ratio, similar to cast iron but with a lighter weight. One option to consider is aluminum alloy, which has a density of 0.098 lbs per cubic inch and can be just as strong as cast iron. There are many companies that cast aluminum alloys, so it should be readily available and cost-effective. I recommend researching different aluminum alloys and their properties to find the best fit for your project. Additionally, you may want to reach out to casting companies directly to inquire about their capabilities and availability for your specific needs. I hope this helps and good luck with your project!