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Herador® EC - for C&B
Herador® EC - for C&B

Herador® EC - for C&B

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Indications

Specifications

Product details
Composition
(content in mass %)
Au 75.0
Ag 8.0
Pt 14.3
Zn 2.5
Ta 0.2
Type (Classification acc. EN ISO 22674) 4 (v/k)
3 (s)
s= self-hardening alloy after slow cooling in the mould
v= Condition after hardening
k= Bonding alloy: condition after ceramik firing
Shade Yellow
Indication Crowns
Bridges
Milling technique A)
Article code 1612 0000
Technical data, melting and casting
Melting range(1) Solidus 1015 °C
Liquidus 1110 °C
Preheating temperature 800 °C
Casting temperature 1260 °C
Crucible Graphite
Density(1) 17.8 g/cm³
Hardness, HV5 w/k 195
v 220
s 155
0.2 % proof stress(1), MPa(2)
w/k 440
v 490
Elongation(1) % w/k 9
v 7
Elastic modulus(1), GPa (2) 100
Ceramic firing
CTE 14.8
Oxide firing 880(1)°C
10 min.
vacuum - yes
Soft annealing ---
Processing after oxide firing Pickling in Hera AM 99 ca. 70°C / 10 min.
Cooling after ceramic firing
(Relexation cooling is recommended for lang span, bulky frameworks)
HeraCeram: Rapid cooling
At the end of the programm the firing platform is completely and firing tray with objects is removed emediately. The firing tray can cool next to the furnace on a fire-resistant tray.
Others: Slow cooling
Depending on programming of the furnace either slow cooling to the initial temperature can be performed for approx. 4 – 6 minutes or a tempering phase of 3 – 5 minutes can be set at approx. 800 °C (high-melting alloys) resp. at approx. 700 °C (low-melting alloys).
Rapid cooling can always be performed for oxide and opaque firings. (3)
Hardening 500 °C
15 min.
Solder / Laser welding wire
Prior to Ceramic Firing
Solder Herador PF Lot
Herador PF 1010 Lot
Working temperature °C: 1010(4) / Solder colour: yellow
After Ceramic Firing
Solder Herador/Maingold PF Lot
Flux** Work. temp.* 800°C / Solder colour: yellow
Alloy also available as Laser welding wire
Ø 0.5 mm x 200 mm +
Ø 0.3 mm x 200 mm -

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