Invar® Sheet (Invar 36® Alloy, NILO® 36, Pernifer® 36)

Tungsten Sheet

EFINEA is a leading source of Invar, a nickel-iron alloy, in sheet form. Our unmatched range of inventory for Invar is available in cold finished sheets. We ship just-in-time from our two warehouse locations in NJ and CA.


Invar is an austenitic alloy that is strong, tough, ductile and possesses a useful degree of corrosion resistance. It is magnetic at temperatures below its Curie point as well as non-magnetic at temperatures above. Invar is the standard “go to alloy” for low expansivity up to 400°F.


Standard grade of Invar alloy is produced in sheet form to conform to ASTM F1684, AMS I 23011 (chemistry only) and UNS K93603 standards. Also, this alloy has been trademarked and can also be referenced under their manufacturer names of CarTech® Invar 36® Alloy, NILO® 36 and Pernifer® 36.


EFINEA invites you to request a quote today or contact us toll-free at 800-348-6268. Our technical sales team is available to answer any questions you have and will provide you with our competitive pricing. Contact us today!

Below please find a sampling of our standard stock items. Our inventory fluctuates based on market demands. If you do not see the size or form you require, we ask that you call us for current product availability.
MaterialFormSize InchesSKU Number

To download a copy of the EFINEA Invar data sheet, or any of our other Controlled Expansion Alloy data sheets, please go to the Data Sheets section in our Technical Library.