will 9ct gold stretch as much as sterling when I hammer it?

[DavidCan]

I have made and sold a lot of textured silver rings I have named 'well hammered' (see pic). I have to start them 5 sizes smaller as they stretch so much when I hammer them on a tapered ring mandrel. My daughter now wants me to make her wedding ring with my well hammered technique, which just means hammering the entire surface of the ring with a ball pein hammer.
Because she wants it made in gold I need to know what size to start it off at, to arrive at her required UK size P.
Can anyone advise me on this?

[ps_bond]

Have you used 9ct much yet? It work hardens much more quickly than silver, so if you want to stretch it 5 sizes then you're in for a fair amount of annealing.
I probably wouldn't do more than 2 sizes, but it'll depend on how much whacking it gets.
If you've got access to a ring stretcher you could hammer it, fully anneal then stretch it to final size?

[DavidCan]

Have you used 9ct much yet? It work hardens much more quickly than silver, so if you want to stretch it 5 sizes then you're in for a fair amount of annealing.
I probably wouldn't do more than 2 sizes, but it'll depend on how much whacking it gets.
If you've got access to a ring stretcher you could hammer it, fully anneal then stretch it to final size?

Many thanks for the rapid response Peter. I haven't worked with gold for decades and don't have access to a ring stretcher. I start my silver rings with 1.2mm sheet so when 'well hammered' on the tapered mandrel it ends up as 1 mm thick. Daughter wanted 9 ct so I've bought D shaped wire 2.3 x 2mm. From what you're saying I should just make it 2 sizes smaller and hammer that up to P, maybe annealing once along the way. Does that seem about right?

[Dennis]

All you have to do is try it with a strip of copper first, which will have similar properties. You have the advantage of stopping when the size is right, or going on if not.
Dennis.

[DavidCan]

Thanks Dennis. Not sure where I'll get a strip of copper 2.3 x 2 mm so I'm just going to try with the gold strip I have. Will post how it works out (or not!)

[DavidCan]

No problem. Made it 4 sizes smaller then hammered with 1 oz ball pein - took it up to size P. No problem. Didn't seem to need to anneal.
Thanks again for feedback

[Dennis]

Thank you for your feedback. Best wishes to your daughter. Dennis.