Low Temperature Fasteners-- low Temperature stability, resistance to corrosion

1.Low Temperature Stability

It maintains high strength even below -60℃, preventing brittle fracture. It is suitable for equipment such as liquefied natural gas pumps and liquid nitrogen pumps.

Carbon steel or alloy steel (such as 35CrMoA/42CrMoA) with a body-centered cubic crystal structure can have its hardness and impact performance optimized through tempering heat treatment.

The preload force is positively correlated with temperature: For A-286 stainless steel screws, at -275℉ (-170℃), due to the thermal contraction effect, the thread friction increases, and the locking performance improves.

The glass fiber/epoxy resin composite material joints have a 15% higher load-bearing capacity at -40℃ compared to at room temperature, and the pre-tightening torque effect is even more significant.

2.Resistance to Corrosion

Stainless steel fasteners (as per the ISO 3506-1 standard) possess both corrosion resistance and mechanical properties in low-temperature environments.

Wind turbine bolts (such as 10.9/12.9 grade) need to withstand multi-axis stress and dynamic loads, and should avoid brittle fracture at low temperatures.

3.Ease of Installation

The low-friction coefficient design facilitates installation and disassembly in low-temperature environments.

1.Aerospace
Rocket fuel storage tanks, liquid hydrogen/liquid oxygen pipeline connections (such as in SpaceX's cryogenic propulsion system)
The wind tunnel model employs a low-temperature locking device, which enhances the connection stability through the thermal contraction effect.

2.Liquefied Natural Gas (LNG) and Energy
LNG storage tanks, transport ships and pipeline flange connections (with working temperatures as low as -162°C).Liquid nitrogen/liquid helium storage equipment (such as for fixing superconducting magnets).

3.Superconductivity and Quantum Technology
The cryogenic support structure of superconducting magnets (such as those in MRI equipment)，The cryogenic thermostat of a quantum computer (close to absolute zero).

4.Food freezing and cold chain logistics
Fixed shelves for ultra-low temperature cold storage (-80°C).Liquid nitrogen quick-freezing equipment conveyor belt fasteners