TECHNO-WELD is a proprietary
alloy based on zinc, Aluminium,
copper, manganese, magnesium, and other metals. Joints may
show a weak bond if excessive silicone is present in the
base metal.
No flux
is recommended for the joint, since fluxing will remove the
trace elements that align the dendrite structure before the
bond is complete. Do not use a deoxidiser on this product.
Pulsation resistance welding will allow a controlled
heating of the joint.
Join testing
was undertaken by Reynolds Aluminium, and was tested on
both 3003-H14 and 1100-H14 Aluminium. T joins were made by
using 2 sheets of 0.01" x 2 x 3" and were subjected to a
continuous 5% salt spray test. No failure was observed
after 500 hrs.
Corrosion resistance
is dependent upon the surrounding environment. When tested
on the Eastern Seaboard, Long Island, NY, the penetration
rate reached 0.000762 mm per year. Near very heavy
Industrial operations, the penetration was magnified to
0.00173mm per year.
This material is expected to perform safely wherever zinc
or zinc coated steel has been used in the past with
success.
Several socket joints were made to simulate return bends
used in practice for 3/8" dia., .89mm wall Aluminium
tubing. They had a nominal 1/4" joint length. They were
subjected to 720 hrs. in a controlled humidity cabinet
(100% relative humidity) at 65.5°C with no visible signs of
corrosion.
Endurance limit on a 1/4" section showed a limit of 8500
psi at 100 million cycles.
Lap joins were made from 2 sheets of 1/8" thickness
Aluminium, 5" long and 2" wide. Using a Tinius Olsen
Tensile Strength Machine, the following results were
obtained:
Standard finishes: Mechanical, electrodeposited, chemical,
organic, and plastic.
7.5% (1/4") 3% in 2";
solidification shrinkage 0.14"/ft
Comprehensive Material
Data
TECHNO-WELD LOW TEMPERATURE ALUMINIUM FUSION WELDING RODS
AND MATERIAL.
Vendee and third persons assume the risk of injury directly
or indirectly caused by the material if reasonable safety
procedures are not followed as provided for in the data
sheet, and vendor shall not be liable for such injury.
Furthermore, vendor shall not be liable for injury to
vendee or third persons, directly or indirectly caused by
abnormal use of the material, even if reasonable safety
precautions are followed.
All persons using this product, all persons working in an
area where this product is used, and all persons handling
this product should be familiar with the content of this
data sheet. Posting this document for employee notification
is recommended by the vendor and may be required by law.
1. Hazardous Ingredients
material/component
zinc (Zn)
aluminium (Al)
copper (Cu)
DUST
FUME
2. Physical Data
material
Zn
Al
Cu
boiling point
907°C
2467°C
2595°C
specific gravity (density @ 25°C)
7.133 g/cm3
2.699 g/cm3
8.94 g/cm3
vapeur pressure
N/A
N/A
N/A
vapeur density
N/A
N/A
N/A
solubilité in h2o
N/A
N/A
N/A
% de volatiles by vol.
N/A
evaporation rate
N/A
appearance and odeur
Silver coloured metal with no
odour
3. Healt Hazard Information
(a) PRIMARY ROUTES OF
EXPOSURE:
Ingestion of Dust, Inhalation of Dust or Fume
ZN
Chronic inhalation of Zinc Ocide dust or fume.
NOTE: Zn is a high percentage of the Techno Weld
formula
Al
Inhalation of fumes from melting, casting, welding
or burning and dust from grinding or cutting. NOTE : Al
is a low percentaga of the Techno Weld formula
Cu
Industrial exposure to copper fumes, dusts or mists
result in metal fume fever with atrophic changes in
nasal mucous membranes. Chronic poisoning results in
Wilson's disease, characterised by a hepatic cirrhosis,
brain damage, demyelination, renal disease and copper
deposition in the cornea. NOTE : Cu is a low percentage
of the Techno Weld formula
(B) EFFECTS OF OVEREXPOSURE:
Ingestion of Dust, Inhalation of Dust or Fume
Acute
Excessive inhalation of fumes from many metals can
produce an acute reaction known as "metal fever".
Symptoms consist of chills and fever (very similar to
and easily confused with flu symptoms) which comes on a
few hours after such an exposure. Long-term effects
have not been noted.
Chronic
Fumes may cause irritation of the respiratory
tract, skin and eyes.
3.1 Emergency & First Aid
Treatment
Flush eyes with water at least for 15 minutes, and
seek medical assistance if neccessary.
Remove excess dust from skin and wash affected area
with soap and water. Seek medical assistance if
neccessary.
Treat burns from molten materials as you would any
other serious burns.
Inhalation: Remove from over-exposure to fresh air:
Consult Physician. Keep subject warm and resting.
Perform artificial respiration if breathing has
stopped
ingestion: f large amounts are ingested, give 1-2
glasses of milk. Induce vomiting only if subject is
fully consious andhas not convulsed. (Ingestion of
significant amounts is unlikely.) All severe ingestion
cases should have immediate medical aid.
4. Fire and
Explosion data
Flash Point :
N/A
Auto Ignition Temperature :
N/A
Flammable Limits in air (% by Vol.) :
N/A
Extinguishing Media :
Special mixtures of dry chemicals suitable for
metal fume. Do not use water or moist sand. Fire
fighters should wear self-contained breathing apparatus
and protective clothing.
Specila Fire :
Metal products are no a fire hazard. However, dust
generated from grinding especially if mixed with
flammable coatings may present a fire or explosion
hazard under certain conditions. At a temperature above
375°C this alloy may melt and continuous heating could
produce metal vapour.
5. Reactive
data
Incompatibilité
Pure Zinc
Incompatible with strong acids, sodiums of
halogens
Pure Aluminium
N/A
Pure Copper
Incompatible with 1-bromo-2-propyne, fume is
incompatible with acetylene gas, dust and mist are
incompatible with acetylene gas and magnesium
metal
Hazardous Decomposition
N/A
Hazardous Polymerisation
Does not occur
6. Spills, Leaks
& Disposal Methods.
Steps to be taken:
No special precautions are necessary for spills of
bulk material. If large quantities of dust are spilled,
remove by vaccuming with approved HEPA type filtration
or wet sweeping to prevent heavy concentrations of
airbourne dust. Clean-up presonnel should wear
respirators and protective clothing.
Waste disposal:
Scrap metal can be reclaimed for re-use. Follow
Government and Local regulations regarding
disposal
7. Special
Protection Information
Specific Personal Protection
Eyes
Goggles, Face Sheild
Hands
Use chemical resistant gloves to avoid repeated
skin contact
Other Clothing
Wear non-flammable protective clothing suitable for
the process of melting, casting and torch welding
Work Hygene
Avoid ingestion of material. Wash hands and face
before eating, drinking or consumption of tobacco
Other Handling and Storage
Requirements
Use good housekeeping practices to
prevent accumulations of dust and to keep airborne dust
concentrations at a minimum. Avoid breathing dust or
fumes. Store material away from incompatible materials,
and keep dust away from sources of ignition.