Controlled Expansion Alloys

NAS 36

NAS 36 is an alloy with nickel (36%) and iron as its main components. Because its coefficient of thermal expansion is extremely low, at about 1/10 that of 18-8 stainless steel, thermal stress caused by temperature changes can be held to a very low level, and complex shapes (wave, bellows, etc.) like those required with other low-temperature materials are not necessary. NAS 36 also shows high toughness at low temperatures and provides excellent weldability. Nippon Yakin supplies NAS 36 in sheet and strip forms.

  • Image: Coil
    Coil
  • Image: Sheet
    Sheet
  • Image: Plate
    Plate

Weldability

NAS 36 has good weldability. Joints of thin sheet materials can be welded by TIG welding without a filler, even in seam welding.

Applications

Bimetals, LNG tankers, molds, parts requiring low coefficient of thermal expansion.

Download

NAS 36 Spec Sheet (PDF 173KB)

NAS 36LG

At 36 percent, the primary component of NAS 36LG is nickel, giving this alloy an extremely low coefficient of thermal expansion—about one-tenth that of 18-8 stainless steel. NAS 36LG maintains thermal stress due to temperature variation at an extremely low level. When used with low-temperature materials, complex surface forms such as waves, bellows and loop patterns are not required, making NAS 36LG an easy metal to work with.
This alloy has a high ductility at extremely low temperatures and is particularly good for welding. Given these properties, NAS 36LG is used in liquefied natural gas ships, membrane material for land container tanks, and a variety of container and piping materials for handling extremely low-temperature fluids. Nippon Yakin supplies this product in coil and sheet forms.

  • Image: Coil
    Coil
  • Image: Sheet
    Sheet

Low-temperature ductility

Because of its austenitic structure, the impact value does not vary, ensuring adequate ductility at room temperature and even extremely low temperatures.

Workability

Soft and extendible at room temperature, NAS 36LG can be easily worked.

Corrosion resistance

Because NAS 36LG does not contain the chromium found in stainless steel, care must be taken to ensure rusting does not occur.

Applications

Membranes for liquefied natural gas ships and land storage tanks, containers for extremely low-temperature fluids

Back to top