Overview
Eastern Alloys manufactures a comprehensive line of purpose
developed EAZALL™ coating alloys providing optimal corrosion-protection for
steel strip, shapes, and tubing and wire products. EAZALL™ brand alloys meet
the needs of the largest continuous steel strip and sheet-coating mills to
after-fabrication hot dip galvanizers to high-speed tubing and wire coaters.
New technology allows steel products to effectively compete for new structural
and architectural applications, many of which depend upon zinc coatings as an
economical means of corrosion protection. Much of this growth is a result of
new zinc coating alloys such as Galvalume™ and Galfan™ designed for specific
properties and performance.
Galvalume™ poured into sow shapes |
Eastern Alloys produces EAZALL™ coating alloys at its flagship
facility located in Maybrook, New York, in the heart of the historic Hudson
Valley region, and at Eastern Alloys of Kentucky, LLC, the company's green-site
facility in Henderson, Kentucky. The new operation, commissioned in April 2000,
is the most technologically advanced zinc alloy and recycling complex
constructed in North America. Each is ISO-9000 registered. Unique to Eastern
Alloys, Galvalume™ is manufactured in electric induction furnaces. Eastern
Alloys of Kentucky features twin 12.5 tons 1750 kW Inductotherm melters that
can produce over 50 tons per day. The use of electric induction furnaces
provides exacting chemical composition and homogeneity. Of additional interest,
Eastern Alloys is the leading manufacturer of Galfan™ in North America.
Galfan™, developed by ILZRO, differs from other coating alloys in its
composition containing rare earth metals, Cerium and Lanthanum. The principle
feature of Galfan™-coated products is the ductility of the zinc coating. As a
result, Galfan™-coated products offer creative solutions for intricately shaped
products requiring the strength and formability of steel.
Galvalume™ jumbo sows |
The Eastern
Alloys product range includes
“pre-mixed” coating alloys, as well
as master alloys for bulk-bath
chemistry management and customer
self-alloying. Alloys are
manufactured according to the ASTM
specifications, or customized to
customer-specific requirements.
Steel-coating alloys are supplied in
convenient, easy-to-handle 22-pounds
ingots, in ASTM strip, or custom
jumbo sows for large capacity
continuous coating lines. Eastern's
coating alloys can be found at the
world's leading steel coaters.
As an adjunct to its steel coating alloys, Eastern Alloys
provides dross recycling/recovery programs.
For more information about steel coating alloys and Eastern Alloys, contact the
Eastern Alloys sales engineer nearest you
, or send inquiries to rwinter@eazall.com.
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Alloy Description
|
Galvanize Coating |
Galvanizing is the most
common hot-dip coating
method of steel sheet.
The word “galvanize”
comes from the galvanic
protection that zinc
provides to steel when
exposed to a corroding
environment. Zinc
provides a combination
of a galvanic and
physical barrier
protection to steel,
offering excellent
corrosion protection in
a variety of
environments. |
|
Galvaneal Coating |
To improve the
weldability, abrasion
resistance and
paintability of
Galvanized steel
products, an annealing
process can be
incorporated in the
galvanizing line. This
process adds additional
heat to the coated
product, causing
diffusion alloying of
the zinc and steel,
creating a final coating
product containing up to
8-11% iron. |
|
Brightener Master Alloys |
Most Galvanizing lines
have an annealing
option. In order to
achieve an optimal
annealing performance,
the galvanizing bath
chemistry is modified to
0.1% Aluminum (from
0.25% Aluminum for
Galvanized coatings).
When converting the
Galvaneal Coating bath
back to a Galvanizing
bath, Brightener master
alloys are used to add
the required aluminum
content. There are two
forms of Brightener
Alloys: 95-5 Brightener
(5% Brightener) and
90-10 Brightener (10%
Brightener). In
addition, these
Brightener alloys are
also used to maintain
the aluminum content in
the galvanizing bath on
an on-going basis. |
|
Galvalume |
This steel coating
product offers a better
physical barrier than
standard galvanized
coatings, and offers
better corrosion
resistance in most
environments. Eastern
Alloys manufactures
“Pre-mixed” Galvalume to
those manufacturing
facilities who do not
want the challenges
associated with the
alloying process,
including purchasing
metals, melting & mixing
and testing. Eastern
Alloys also manufactures
Aluminum Silicon master
alloys that are also
used to simplify the
alloying process for
Galvalume. |
|
Galfan |
This product is used on
steel products requiring
higher
ductility/formability,
with the same
galvanic/physical
barrier protection as
galvanized products.
Galfan is used often in
wire or tube products
that require higher
levels of ductility
after production.
Eastern Alloys produces
several variations with
higher Aluminum content.
These are used to help
maintain and adjust the
bath chemistry. They are
also for lines that are
using a double dip
process. |
Topp
| |
|
|
Type A3
UNS-Z30503 |
Type A4
UNS-Z31510 |
Type A1
UNS-Z30750 |
Type A2
UNS-Z31710 |
|
| Al |
54-59 |
4.2-6.2 |
4.5-5.5 |
4.5-5.5 |
9.5-10.5 |
9.5-10.5 |
Bal |
| Fe |
0.2 |
0.075 |
0.02 |
0.15 |
0.05 |
0.15 |
Varies based on product
requirement |
| Pb |
0.01 |
0.005 |
0.004 |
0.4 |
0.005 |
0.40 |
| Cd |
0.05 |
0.005 |
0.003 |
- |
0.004 |
- |
| Sn |
0.05 |
0.002 |
0.002 |
- |
0.003 |
- |
| Cu |
0.03 |
- |
0.03 |
0.5 |
0.035 |
0.5 |
| Si |
0.9-2.3 |
0.015 |
- |
- |
- |
- |
2-4 |
| Ce & La |
- |
0.03-0.1 |
- |
- |
- |
- |
Varies based on product
requirement |
| As |
- |
- |
- |
- |
- |
- |
| Cr |
0.05 |
- |
- |
- |
- |
- |
| Mn |
0.05 |
- |
- |
- |
- |
- |
| Ni |
0.05 |
- |
- |
- |
- |
- |
| Ca |
0.05 |
- |
- |
- |
- |
- |
| Ti |
0.01 |
- |
- |
- |
- |
- |
| Li |
0.05 |
- |
- |
- |
- |
- |
| Others, each... |
- |
0.02 |
- |
- |
- |
- |
| Others, each... |
- |
0.04 |
- |
|
0.01 |
0.25 |
| Zn |
41-44 |
Balance |
Balance |
Balance |
Balance |
Balance |
Color Code
ASTM B914 |
Orange/Green |
Purple/Blue |
Red/Blue |
Red/Yellow |
Red/Green |
Red/Black |
| |
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Shapes and Sizes
| 90-10 Brightener |
22 |
2,400 |
- |
2,400 |
2,400 |
1,200 |
| 95-5 Brightener |
22 |
2,400 |
- |
2,400 |
2,400 |
|
| Galfan™ |
22 |
2,400 |
- |
- |
2,400 |
1,200 |
| Galvalume™ |
- |
1,300 |
2,350 |
- |
1,650 |
- |
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Eastern Alloys, Inc. is a member of the London
Metal Exchange, or LME, ILZRO, Interzinc, NADCA, and DDC.