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Metal-Joining Products
PRODUCTS & SERVICES | ENGINEERING MATERIALS | ELECTRICAL CONTACTS
Metal-joining Products comprising a range of Mallory materials based on copper and silver, to two main areas of application:
RESISTANCE WELDING SUPPLIES
Copper has a high electrical and thermal conductivity and is the basis of resistance welding alloys. The most significant of these are Mallory 328, Mallory 100 and Mallory 20W3.Mallory 328 is a chromium-copper alloy with added zirconium. It is resistant to cracking and sticking and is particularly suitable for welding tin-plate, mild steel and coated steel.
Mallory 100 contains cobalt, nickel and beryllium, and has moderately good conductivity and even greater hardness than Mallory 328. It is particularly suitable for welding high-resistance materials such as stainless steel and heat-resistant alloys.
Mallory 20W3 is a copper-tungsten alloy manufactured using powder metallurgy techniques. This process produces an alloy with high hardness, reasonably good electrical conductivity and extremely high softening temperatures. Mallory 20W3 is best suited to die inserts or facings for projection, flash and butt welding, and hot upsetting and riveting.
Resistance Welding Alloys
Product |
Nominal Composition |
Hardness HRB |
Cond*1 |
Temp*2 |
Relevant
Specifications |
Applications |
Mallory
328 |
1%
Cr-1% Zr-Cu |
80 |
75 |
525 |
RWMA
CLASS 2 BS 4577 A/2/2 DIN 44759 A2/2 |
All
parent metals and processes. Welding coated steel in particular. |
Mallory
100 |
2.5%
Co-Ni-0.4% Be-Cu |
90 |
45 |
500 |
RWMA
CLASS 3 BS 4577 A/3/1 DIN 44759 A3/1 |
Welding
stainless steel. Projection, cross wire and butt welding dies. |
Elkanite
20W3 |
75%
W-Cu |
97 |
30 |
1,000 |
RWMA
CLASS 11 BS 4577 B11 DIN 44759 B11 |
Inserts
and facings for projections, cross wire and butt welding. |
Elkanite
20K3 |
67%
WC-Cu |
105 |
20 |
1,000 |
BS
4477 B12 DIN 44759 B12 |
Inserts
and facings for hot riveting and forging. |
Elkanite
100M |
100%
Mo |
85 |
20 |
1,000 |
RWMA
CLASS 14 BS 4577 B13 DIN 44759 B13 |
Inserts
and facings for welding non-ferrous materials. |
Elkanite
100W |
100%
W |
119 |
30 |
1,000 |
RWMA
CLASS 13 BS 4577 B14 DIN 44759 B14 |
Tips
for resistance brazing, hot riveting. Cross wire welding in copper and
brass. |
Elkanite
35S |
65%
W-Ag |
91 |
52 |
900 |
BS
4577 B15 DIN 44759 B15 |
Inserts
and facings for high frequency welding of steel. |
*1
- Conductivity (%IACS)
*2 - Softening Temperature oC
BRAZING
Brazing
is an important, flexible and long-established system of metal joining with
proven, unique and beneficial properties. The Mallory
range of brazing alloys allows the customer the use of a number of heating methods
to complement the wide choice of alloys available.
The
benefits of the Mallory range:
low temperature
joining - down to 600ºC
good mechanical
strength
excellent corrosion
resistance in a wide variety of environments
smooth neat
joints
a wide range
of parent metal combinations
The Mallory range of products is
available in a variety of forms:
rods, plain
and flux coated
wire, strip
or foil
washers, rings
and special shapes
powders
Brazing
Alloys
Product |
Nominal Composition |
Melting
Range ºC |
AWS* |
Applications |
|||
Ag |
Cu |
Zn |
Other |
||||
Elkaloy
55 |
55
|
21
|
22
|
2
Sn |
630-660 |
BAg-7 |
The
most commonly used general purpose low temperature alloy. |
| Elkaloy
42 |
42
|
17
|
16
|
25
Cd |
608-617
|
BAg-1
|
A
general purpose alloy containing cadmium. |
| Elkaloy
38 |
38
|
31
|
29
|
2
Sn |
660-720
|
BAg-34
|
A
less free-flowing alloy suitable for joints with larger gaps. |
| Elkaloy
30 |
30
|
36
|
32
|
2
Sn |
655-755
|
A
slow-flowing alloy capable of filling large fillets. |
|
| Elkaloy
05 |
5
|
89
|
- |
6
P |
644-815
|
BCuP-3
|
A
self-fluxing alloy containing phosphorous for copper to copper joints.
|
| Elkaloy
00 |
-
|
92.6
|
- |
7.4
P |
714-810
|
A
self-fluxing alloy containing phosphorous suitable for unstressed copper
joints. |
|
| Elkaflux
|
A general purpose flux powder for use with all low temperature silver brazing alloys. It will successfully flux all the common engineering materials and its residues are soluble in hot water. |
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*
Relevant Standards AWS Classification
| All
Mallory Alloys Group products conform to, if not exceed, the relevant
standards as assured by the Quality Management System |
 |