SH-2 as welding gas
SH-2 is specifically designed for welding austenitic stainless steels where more arc energy, better penetration and faster welding are required. The composition of the gas – 2% hydrogen in argon – raises the arc temperature, making it concentrated and hot, which improves mass transfer and allows for a cleaner weld surface. The SH-2 is suitable for TIG and plasma arc welding, root protection and welding of thin materials where precise fusion control is required.

The use of hydrogen as a welding gas requires caution: although it improves the welding properties of certain steels, the use of SH-2 is not recommended for materials susceptible to hydrogen embrittlement, such as ferritic and low-alloy steels. When used correctly, SH-2 allows fast and high quality welding, especially in applications requiring corrosion resistance.

SH-2 differs from SH-3 and SH-5 in particular in terms of hydrogen content and safety: the more hydrogen, the greater the risk of hydrogen embrittlement in non-austenitic steels. SH-2 offers a good compromise, improving arc energy without significant risk of embrittlement.

Available grades:
Industrial SH-2

Packaging:
SH-2 gas is available in cylinders and cylinder batteries.

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 suffocation
Increased concentration of SH-2 gas in the breathing air 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-2 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