Fine gold 999,9

376 g

+ Master alloy

624 g A109/Y

Colour

yellow

Order-No.

2610100108

Designation

A109/Y, for 9K yellow gold

Melting range

830°C - 730°C

Density

10,9 g/cm³

Hardness

as cast: 145 HV
soft: 125 HV
50% reduction: 240 HV

Application

jewellery casting

Casting

suitable for vacuum casting and centrifugal casting

Casting temperature

970 °C - 1000°C

Flask temp.

600°C - 640°C

Investment

plaster bonded

Quenching

in 80°C hot water after 15 - 20 minutes

Working

Material can be deformed max. 50%  then it must be annealed. Only roll a little at a time. Roll the same thickness several times if necessary.

Annealing

650°C / 30 min, and then quench in hot water

Hardening

400°C - 440°C / 60 min, slow cool in air

Brazing

WIELAND brazing alloys 1010H (700°C), 1011M (660°C)

Flux

Fluoron

Pickling agent

sulphuric acid (H₂SO₄) 10 %