Fine gold 999,9

376 g

+ Master alloy

624 g A109/L

Colour

Deep yellow

Order-No.

2610100308

Designation

A109/L, for 9K yellow gold

Melting range

805°C - 900°C

Density

11,1 g/cm³

Hardness

as cast: 115 HV
soft: 110 HV
50% reduction: 230 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 1110H (700°C),
1111M (670°C), 1112W (640°C)

Flux

Fluoron

Pickling agent

sulphuric acid (H₂SO₄) 10 %