4320AQ
(UNS G43200) 4320AQ (Aircraft Quality) Alloy steel with high toughness and strength with a low carbon content which yields good welding characteristics. Is machined well in the annealed condition.
Chemistry
| Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
| 4320AQ |
0.170-0.220% |
0.450-0.650% |
0.035% max |
0.040% max |
0.150-0.300% |
0.400-0.600% |
1.65-2.00% |
0.200-0.300% |
Physical Constants
| Density | 0.284 lbs/in3 |
| Density | 7.85 g/cm3 |
Heating
| Forging | 1900-2200ºF |
| Annealing | 1600ºF furnace cool |
| Tempering | 400-1300ºF |
| Normalizing | 1650ºF air cool |
| Austenize | 1500ºF then oil quench |
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" X 14" X 14" | 750 lbs. |
| Shafts | 12" Dia max X 96" long | 2600 lbs. |
