Types of cast iron suitable for swage blocks?

[Iron Poet]

I have an idea for a swage block that I want cast and the only place that returned my email told me that they'd cast it in ductile 65-45-12, is this the proper material? Or should I hold out for someone willing to cast in steel?

[ThomasPowers]

Yes no or maybe depending on what YOU want from it how YOU work with a swageblock and what YOU can pay.

I would love a ductile block myself the old ones were cast iron and NOT cast steel.  I'm not familiar with the ductile alloys but if it's a good strong one than YOU have to make the call.

[Iron Poet]

40 minutes ago, ThomasPowers said:

Yes no or maybe depending on what YOU want from it how YOU work with a swageblock and what YOU can pay.

In all honesty I'd love one cast out of tool steel or even medium carbon, especially since I'm not the most gentle person and I use my current swage block to handle my larger hardies.

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I'm not familiar with the ductile alloys but if it's a good strong one than YOU have to make the call.

I'm not either, which is why I've decided to ask you guys.