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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.
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.
The low-friction coefficient design facilitates installation and disassembly in low-temperature environments.
Rocket fuel storage tanks, liquid hydrogen/liquid oxygen pipeline connections. The wind tunnel model employs a low-temperature locking device, which enhances the connection stability through the thermal contraction effect.
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).
The cryogenic support structure of superconducting magnets (such as those in MRI equipment). The cryogenic thermostat of a quantum computer (close to absolute zero).
Fixed shelves for ultra-low temperature cold storage (-80°C). Liquid nitrogen quick-freezing equipment conveyor belt fasteners.
| Low Temperature Fasteners Available Types | |||
| Digital Grade | Material | Executive Standard | Withstand Temperature |
|---|---|---|---|
| 1.1133 | 20Mn5 | — | -20℃ |
| 1.6582 | 34CrNiMo6 | DIN EN 10269 | -40℃ |
| 1.5523 | 19MnB4 | — | -60℃ |
| 1.7225 | 42CrMo4 | — | -100℃ |
| 1.5680 | X12Ni5 | DIN EN 10269 | -120℃ |
| 2.4952 | NiCr20TiAI | DIN EN 10269 | -196℃ |
| 1.4980 | X6NiCrTiMoVB25-15-2 | DIN EN 10269 | -196℃ |
| 1.4429 | X2CrNiMoN17-13-3 | — | -270℃ |
| 2.4668 | NiCr19Fe19Nb5Mo3 | ASTM B637 | -273℃ |
