Fine gold 999,9

751 g

+ Master alloy

249 g A118/ Y

Colour

Deep yellow (3N)

Order-No.

2620100108

Designation

A118/ Y , for 18K yellow

Melting range

880°C - 850°C

Density

15,2 g/cm³

Hardness

as cast: 130 HV
soft: 125 HV
70% reduction: 245 HV

Application

jewellery casting and continuous casting as sheet, wire, tube

Casting

suitable for vacuum casting and centrifugal casting as well as for continuous casting of tube, strip and wire

Casting temperature

1040°C - 1060°C

Flask temp.

620°C - 640°C

Investment

plaster bonded

Quenching

in 80°C hot water after 20- 25 minutes

Working

Material can be deformed max. 70%, 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 1630H (810°C),
1631M (780°C), 1632W (750°C)

Flux

Fluoron

Pickling agent

sulphuric acid (H₂SO₄) 10 %