Argentium 960-Pure Manual do utilizador - Página 5

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Heat-hardening treatments

Argentium silver can be formed into complex shapes in its fully soft condition and by means of heat

treatments have its hardness and durability increased.

Step 1

After annealing or soldering allow Argentium silver to air-cool to room temperature.

Step 2 (This step increases the hardness of Argentium 960-Pure by 20-30HV/DPH)

Heat Argentium silver in a furnace or oven at 300°C/572°F for 120 minutes, then air-cool to room

temperature.

Step 1

Torch annealing method: Heat Argentium silver to a pale-red annealing temperature, wait until the red

glow has disappeared then quench in water.

Furnace annealing method: The recommended temperature is 650°C/1202°F under inert atmosphere

(nitrogen or argon) or slightly reducing atmosphere (maximum 5-10% hydrogen) for 10-20 minutes.

Step 2 (This step increases hardness of Argentium 960-Pure by 55-65HV/DPH)

Heat Argentium silver in a furnace or oven at 300°C/572°F for approximately 120 minutes, then air-cool

to room temperature.

Important information

•

Hardness will differ between wrought and cast material.

•

Lower temperatures can be used for Step 2 (minimum temperature of 220°C/428°F), with a

corresponding increase in time.

•

Preheat the oven/furnace and supports to the required temperature before commencing the heat-

hardening treatments.

•

Make sure that the oven is clean and free from chemicals and substances that may be detrimental

to the heat treatment process.

•

Slight discolouration may occur during the heating processes - this can easily be removed using

pickle.

•

Remember that Argentium silver glows a paler colour than traditional sterling silver at red-hot

temperatures - it is recommended to carry out heating applications in a shaded area to facilitate

temperature/colour recognition and prevent overheating.