French Version
German Version
French Version |
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German Version |
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Material: |
Mallory
328 |
Type: |
Chromium,
Zirconium, Copper. |
Description: |
Precipitation
hardened (age hardenable) copper alloy with moderate strength and hardness
and good electrical and thermal properties. |
Applications: |
Mallory
328 is the primary resistance welding electrode material.
Its versatility makes it an ideal choice for many different applications
and has been adopted throughout Europe as a replacement for the superseded
Mallory 3. |
It
can be made into electrodes, caps, wheels and rings and is used to weld
all parent materials, aluminum and its alloys, mild steel and particularly
coated steels. |
|
Other
applications include: |
|
1.
Structural parts for
welding machines. |
|
2.
Rotor bars and end
rigs for electrical motors and generators. |
|
3.
Soldering iron tips. |
|
4.
Plasma gun nozzles. |
|
5.
M.I.G. welding tips. |
|
Associated
data - Mallory 328 Health & Safety 1300 : 130 |
|
Supply
Condition: |
Material
is supplied as standard in the fully heat treated condition.
Material suitable for bending can be provided to special order. |
Nominal
Composition: |
Chromium
1.0% |
Zirconium
0.1% |
|
Copper
balance |
|
Forms
of Supply: |
This
material is available in round, square, rectangular and hexagonal drawn
bar, plate, sheet, extrusions, forgings, castings, discs and rings. |
Standard
Sizes |
|
Round
bar from 3mm to 200mm diameter |
|
Square
bar from 4mm sq. to 140mm sq. |
|
Rectangular
bar from 20mm x 8mm to 400mm x 60mm |
|
Discs
from 172mm dia. to 316mm dia. with thicknesses from 9mm to 35mm. |
|
Non-standards
can be produced to order |
| Mechanical Properties | ||||||
| Hardness | Rockwell B | Vickers | Brinell 30 | |||
| Minimum | (Note 1) | 79 | 146 | 150 | ||
| Typical | (Note 2) | 82-89 | 150-177 | 160-185 | ||
| (Note 3) | 79-86 | 146-165 | 150-175 | |||
| (Note 4) | 67-83 | 125-154 | 130-170 | |||
| (Note 5) | 61-79 | 120-146 | 120-150 | |||
| Tensile Strength | Ton/in2 | MPa | ||||
| Minimum | (Note 1) | 26.5 | 410 | |||
| Typical | (Note 2) | 30.5-41.5 | 470-640 | |||
| (Note 3) | 28.5-32.0 | 440-490 | ||||
| (Note 4) | 24.0-30.5 | 370-470 | ||||
| (Note 5) | 21.0-28.5 | 320-440 | ||||
| Yield Strength | Ton/in2 | Mpa | ||||
| Typical | (Note 2) | 28.5 min | 440 min | |||
| (Note 3) | 22.5 min | 350 min | ||||
| (Note 4) | 17.5 min | 270 min | ||||
| (Note 5) | 12.5 min | 195 min | ||||
| Elongation | % | |||||
| Minimum | (Note 1) | 15 | ||||
| Typical | (Note 2) | 10-20 | ||||
| (Note 3) | 12-25 | |||||
| (Note 4) | 18-25 | |||||
| (Note 5) | 18-25 | |||||
| Modulus of Elasticity (Tension): | Approximately 7900 Ton/in2 | 122000 Mpa | ||||
| Modulus of Rigidity (Torsion): | Approximately 2655 Ton/in2 | 41000 Mpa | ||||
| Electrical Properties: | ||||
| Electrical Conductivity | % I.A.C.S.* | m/ohm.mm2 | ||
| Minimum | (Note 1) | 75 | 43.5 | |
| Typical | 78-90 | 45.5-52.2 | ||
| Electrical Resistance | Microhm.cm | |||
| Typical | 2.21-1.91 | |||
| Thermal Properties: | ||||
| Softening Temperature + | 525 deg C | |||
| Themal Conductivity | W/mK | |||
| Typical | 20 deg C | 320 | ||
| 200 deg C | 390 | |||
| 300 deg C | 430 | |||
| Heat Capacity | 0.376 J/gK | |||
| Mean Coefficient of Thermal | ||||
| Expansion | ||||
| 0-300 deg C | 17.0 X 10-6 | |||
| 0-100 deg C | 15.8 X 10-6 | |||
| Density: | 8.9 g/cm3 | |||
| Machinability: | C.D.A. Rating 20 | |||
| All Mallory Alloys Group products conform to, if not exceed, the relevant standards as assured by the Quality Management System |  |
© Copyright 2004 Mallory Group Limited, all rights reserved.