ZA27/29 replacement for cast leaded yellow brass (bronze)

[gregoreo]

I have a current application of a bronze hub w 2 ears in combination w a ubolt holding up a sign on a pole that has a galvanized steel threaded pipe going into the hub... Can I replace the hub w a less expensive all zinc piece? Will the cast leaded yellow brass or galvanized steel pipe have corrosion or rust issues with the zinc?

 

[arunmrao]

Why not use a galvanized iron casting? It will be a cheaper option, without sacrificing any requirements.

I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)

 

[EdStainless]

If the Zn piece would have enough strength it should work.
You are getting rid of the brass completely, right?

Fastening a galvanized pipe to a cast Zn part is no problem.
Though as has been pointed out, if you need more strength just use a galvanized cast iron part.
Then everything in the system will be galvanized and have similar corrosion resistance.

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Plymouth Tube

 

[gregoreo]

Thank you for your input EdStainless and arunmrao. I am looking into galvanized cast iron. I guess I am more concerned with the cast leaded yellow brass ears, or the copper in it, that would go into the zinc piece. Would there be corrosion there if water was introduced

 

[EdStainless]

If there will still be a brass part, then yes you have a concern.
Leaded brass does not have very good corrosion resistance.

A picture of the assembly with the parts labeled would help us to help you.

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Plymouth Tube

 

[gregoreo]

I am leaning back towards casting the leaded yellow brass that was originally used... I can get it for $3.60/lb(500lb min.)... Would galvanized cast iron be cheaper than that?

 

[EdStainless]

Yes, by a lot, but the min buy might be too much.

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Plymouth Tube

 

[arunmrao]

The price could be about 40% of your target price. But a higher quantity will have to be ordered.

I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)