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TECHNO-WELD is a proprietary alloy based on mainly zinc, with additions of 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.

temperature 379 Solidus - 390 Liquidus (°C)
working temperature 392-495°C
tensile strength Exceeds 50 K.s.i. (345 N/mm2)
shear strength Exceeds 50 K.s.i. (345 N/mm2) Die cast 1/4" section = 52,000 psi Ultimate tensile strength 40,000 psi
solidification shrinkage 1.2% die design, use .3% to .6%)
thermal expansion 25°C - 105°C = .000762mm per °C (.00003" per °C)
thermal conductivity 75°C - 145°C 0.245 cal/cu.cm./°C/second
electrical conductivity 24.9% of Copper
electrical resistivity @ 20°C = 6.8 micro-ohm - cm
impact value Charpy 35 ft-lb
brinell hardness 97
compressive strength Exceeds 90,000 psi
density @ 21°C = 6.7g/cu.cm
elongation 7.5% (1/4") 3% in 2"; solidification shrinkage 0.14"/ft

Comprehensive Material Data


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 (CAS #) Weight (%) OSHA PEL ACGIH TLV
zinc (Zn) (CAS # 7440-66-6) 90-98 2 mg/m3 2 mg/m3
aluminium (Al) (CAS # 7429-90-5) 1.0-9.0 6.5 mg/m3 0.5 mg/m3
copper (Cu) (CAS # 7440-50-8) 0.1-5.0 30 mg/m3 niveau d'action
DUST 1.0 mg/m3(m&D) 1.0 mg/m3(m&D)
FUME 0.1mg/m3 0.2 mg/m3

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.