INVAR36 FM
(UNS K93600) Invar 36FM (Free Machining) is a 36% nickel-iron alloy that has a rate of thermal expansion of approximately one-tenth of carbon steel up to about 400ºF. Used in applications where dimensional changes due to thermal expansion need to kept to a minimum
Chemistry
| Element |
C |
Mn |
Si |
Ni |
Co |
Se |
| INVAR36 FM |
0.05% |
0.90% |
0.35% |
36.00% |
0.20% |
0.20% |
Physical Constants
| Density | 0.291 lbs/in3 |
| Density | 8.01 g/cm3 |
Heating
| Forging | 2150ºF-2200ºF |
| Annealing | 1450ºF then air cool |
Viking Forging Parameters
| Rings | 24" O.D. X 6" long | 500 lbs. |
| Sleeves | 16" O.D. X 12" long | 500 lbs. |
| Disks | 26" Dia. X 6.5" long | 500 lbs. |
| Round Bar | 12" Dia X 96" long | 2600 lbs. |
| Square/Rectangular Bar | 12" Square X 96" long | 2600 lbs. |
| Blocks | 14" X14" X14" | 750 lbs. |
| Shafts | 12" Dia. max. X 96" long | 2600 lbs. |
