A complete portfolio of trouble-free mechanical welding operations for cryogenic applications from Sandvik

Chart offers a complete line of stainless steel cryogenic freezers with vial capacities ranging from 3,200 to 94,000. Our vapor units maintain -190°C at the top storage box and achieve the longest holding times and lowest LN2 consumption of any comparable cryogenic freezers on the market. Photo: Chartindustries

Sandvik has developed a complete portfolio of grades with mechanical properties specifically developed for welding in cryogenic applications. Designed to help customers achieve trouble-free mechanical welding operations, the grades provide high quality weldments that can withstand the tough conditions which normally prevail in cryogenic applications.

Savings on clean-up costs

The grades also offer a balanced content of microelements with minimum impurity levels to reduce the risk of hot cracking during welding operations. This ensures optimum arc stability and fluidity, with minimal spatter and good wetting properties. Considerable savings can be achieved as a result of reduced clean-up and re-working costs.

Optimized mechanical properties

In Sandvik's grades for cryogenic applications the chemical compositions are optimized in terms of Charpy-impact toughness. They also offer high tensile strengths, high yield strengths, good ductility, and uniform elongation. Controlled ferrite content provides resistance to micro fissuring.

Applications and standards

Typical applications are manufacturing of dewars, containers, tanks, cryostats and transfer systems for transportation and storage of liquefied natural gas (LNG), liquefied petroleum gas (LPG), liquid nitrogen and liquid helium.

Our grades also help users to comply with a wide range of standards, such as AWS, SFA, ASME Section II, IX and ASME U, UM, R, S; TüV certification, CRN registration; and CE/PED certification.

The cryogenic program
Grade group Alloy Sandvik designation AWS
Solid wire Nickel Sanicro 60 NiCrMo-3
Nickel Sanicro 72HP NiCr-3
Stainless Sandvik 25.22.2.LMn N/A
Stainless Sandvik 20.25.5.LCu 385
Stainless Sandvik 19.9L 308L
Electrodes Stainless Sandvik 19.9LRCryo 308L
Nickel Sanicro 60 NiCrMo-3
Nickel Sanicro 71 NiCrFe-3
Flux 50SW Sandvik 50SW N/A
15W Sandvik 15W N/A

Sandvik welding

Sandvik offers a complete program of products for welding austenitic stainless steels, duplex stainless steels and nickel alloys. Sandvik's products are characterized by chemical composition within close tolerances and consistency between heats and batches, contributing to trouble-free welding and high-quality welding joints. For most standard grades there are variants with both normal and high silicon content to suit different welding methods.

Contact

Clemente Tallarico
Global Product Manager
clemente.tallarico@sandvik.com
Office Phone: + 41 41 368 30 38 Mobile Phone: + 41 79 307 02 06