SH-35 as welding gas
SH-35 is an argon-hydrogen blend gas used particularly in plasma cutting applications where exceptionally high arc energy and efficient mass transfer are required. The gas composition provides a very hot and concentrated arc, allowing deep penetration and a clean cut. The high ionisation and dissociation energy of hydrogen and good thermal conductivity make SH-35 an effective choice for thick austenitic and high alloy materials.

The use of SH-35 requires careful process control and material selection as the high hydrogen content increases the risk of hydrogen embrittlement. The gas is also highly flammable, so adequate ventilation and control of ignition sources are essential. SH-35 is best suited for mechanised plasma cutting and not for manual cutting or machining of non-austenitic steels.

Laboratory use
The SH-35 gas is used in laboratory and industrial applications, especially when simulating high arc energy or testing the performance of equipment. The gas can also be used as a calibration gas.

Available grades:
Industrial SH-35

Packaging:
SH-35 gas is available in cylinders.

Gases behave differently depending on their quality and state. Always consult the product’s safety data sheet before using the product. A safety data sheet is a document that conveys information about the properties, risks and safe use of a substance or mixture for industrial or professional use.

Risk of fire and explosion
SH-35 is a mixture of hydrogen and argon. Hydrogen is a highly flammable gas that burns hot with an almost invisible flame. A small amount of energy is required to ignite the hydrogen air mixture. Hydrogen under pressure may ignite when discharged without an obvious ignition source, e.g. static electricity or a hot surface. A hydrogen fire is always extinguished by shutting off the gas flow into the fire bag. Other extinguishing methods are dangerous because leaking hydrogen can easily re-ignite and the resulting gas cloud can create an explosion hazard. To prevent the fire from spreading, cool the area around the burning area with water if you can do so safely.

Risk of suffocation
An increase in the concentration of SH-35 gas in the air you breathe poses a risk of asphyxiation. Low concentrations may cause increased respiratory rate and headache. Asphyxiation occurs unnoticed and can be fatal. As the air becomes heavier, it may accumulate in drains and basements and cause elevated concentrations of SH-35 gas in rooms.

First aid
A person suffering from oxygen deficiency should be immediately evacuated to fresh air. If the victim is having difficulty breathing or is not breathing, administer artificial respiration as quickly as possible and call for help. When rescuing a victim, it is important to remember not to enter an oxygen-deprived area without breathing equipment.

Use
– When handling the substance, follow the instructions and safe working practices given
– The gas handler must be properly trained
– Use only carefully checked pressure regulators and other operating equipment suitable for this gas. If in doubt, contact Woikoske.
– Open the valve slowly to avoid pressure shock
– The valve is opened and closed by hand. The use of assistive devices is prohibited!
– It takes about one turn to open the bottle.
– The cylinder in use must be properly secured.
– Keep the valve outlets clean!
– Close the cylinder valve after each use and when the cylinder is empty.
– Always report damaged valves and cylinders to Woikoske.

Transport
– The driver must be aware of the potential dangers of the load and know his duties in the event of accidents and incidents.
– Cylinders shall be transported in an upright position
– The load must be secured
– Cylinders must not be knocked, thrown or dropped from the truck platform
– Attention to ADR regulations during transport

Storage
– Observe all legal and local requirements for the storage of cylinders.
– Store cylinders in a well-ventilated area
– Cylinders should not be stored in conditions that promote corrosion
– Cylinders are stored upright and secured so that they cannot fall over
– Valve guards must be in place AT ALL TIMES
– Empty and full cylinders to be kept separate