lost wax casting, Investment Casting, precision casting, Silicon
Brass, Iron, Stainless Steel, Carbon Steel, Aluminum, ductile iron
GB, ASTM , AISI , DIN , BS,
Up To Ra1.6~Ra12.5
proe, catia, ug, solidworks, cad, pdf, etc
More Than 100T Per Month
Anneal, Quenching, Normalizing, Carburizing, Polishing, Plating,
CNC Center , CNC Machines, Turning Machines, Drilling Machines ,
Milling Machines, Grinding Machines, etc
CMM , Projector, Vernier Caliper, Depth Caliper, Micrometer, Pin
Gauge, Thread Gauge , Height Gauge, etc
100% Inspection Before Shipment
100% Report with shipment
Air or Sea
1. How to get a quotation?
Please send us drawings in igs, dwg, step etc. together with
If you have any requirements, please note, and we could provide
professional advice for your reference.
2. What if we do not have drawing?
Samples would be available, and we would send you drawing to
Of course, we would ensure the safety of the drawing.
3. How to pay?
For small quantity, we could provide Paypal, Paypal commission will
be added to the order.
For the big one, T/T is preferred.
4. How to ship?
For small quantity, we have cooperation with TNT, FEDEX, UPS etc.
For big quantity, air or sea would be available for you to choose.
5. What about the packing details?
We attached our normal packing details.
If you have any special requirements, we would be willing to help.
6. What about the delivery time?
It would be 20-30 days normally for the parts to be ready and we
had a system to ensure the time.
When you made your order, you would know.
Copper and Copper Alloys Casting Problems
Group II alloys
Group II alloys are those that have an intermediate freezing range,
that is, a freezing range of 50 to 110oC between the liquidus and
the solidus. Group II alloys are: beryllium copper (C81400, C82000,
C82200, C82400, C82500, C82600, C82800), silicon brass (C87500),
silicon bronze (C87300, C87600, C87610, C87800), copper-nickel
Beryllium Coppers. These alloys are very toxic and dangerous if
beryllium fumes are not captured and exhausted by proper
ventilating equipment. They should be melted quickly under a
slightly oxidizing atmosphere to minimize beryllium losses. They
can be melted and poured successfully at relatively low
temperatures. They are very fluid and pour well.
Silicon Bronzes and Brasses. The alloys known as silicon bronzes,
UNS alloys C87300, C87600, and 87610, are relatively easy to melt
and should be poured at the proper pouring temperatures. If
overheated, they can pick up hydrogen. While degassing is seldom
required, if necessary, one of the proprietary degasifiers used
with aluminum bronze can be successfully used.
Normally no cover fluxes are used here. The silicon brasses (UNS
alloys C87500 and C87800) have excellent fluidity and can be poured
slightly above their freezing range. Nothing is gained by excessive
heating, and in some cases, heats can be gassed if this occurs.
Here again, no cover fluxes are required.
Copper-Nickel Alloys. These alloys (90Cu-10Ni, UNS C96200 and
70Cu-30Ni, UNS C96400) must be melted carefully because the
presence of nickel in high percentages raises not only the melting
point but also the susceptibility to hydrogen pickup. In virtually
all foundries, these alloys are melted in coreless electric
induction furnaces, because the melting rate is much faster than it
is with a fuel-fired furnace.
When ingot is melted in this manner, the metal should be quickly
heated to a temperature slightly above the pouring temperature and
deoxidized either by the use of one of the proprietary degasifiers