Does anybody know how to harden nickel silver with heat? No work hardening. I know that it is possible, but which temperature and how long?
Thomas
Does anybody know how to harden nickel silver with heat? No work hardening. I know that it is possible, but which temperature and how long?
Thomas
That is a copper alloy so it will be work hardened.
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I'm not super sure but .....600F two hours. Les
replying to PIW, Rosemary wrote: So, if I place a nickel silver sheet in a kiln at 600 degrees for two hours it will be hardened?
No. You can't heat-harden nickel-silver (50% - 80% Cu; 5% - 30% Ni; 10% - 35% Zn). It will work-harden, but not heat-harden.
There are some nickel alloys, such as certain Monels, Inconels, and Hastelloy, that can be heat-hardened by solution heat-treatment. But not the material commonly called "nickel-silver" (which contains no silver).
If you hear otherwise, your source is wrong.
I think they're slightly confused. Precipitation hardening of Sterling silver is possible in the 600f range, although it only takes about an hour. However it doesn't work for Nickel silver. For that, work hardening is your only option.
Paul K. Dickman
Right. And "nickel-silver" was commonly known as "German silver," at least through the 1950s. To engineers, it's a type of bronze, with no silver content at all.
The copper-nickel alloy "Monel K500" can be hardened by heat treatment through precipitation of the added aluminum and titanium:
-jsw
Yeah, as I pointed out above, some grades of Monel and Inconel, and Hastelloy, which is a nickel-containing superalloy, can be hardened through solution treatment and precipitation.
But it doesn't apply to nickel-silver. Monel does look a lot like nickel-silver but it isn't the same thing.
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