347
(UNS S34700) A columbium/tantalum stabilized austenitic stainless steel. Has very good intergranular-corrosion resistance. Used in application of intermittent heating between 800ºF and 1650ºF.
Chemistry
| Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
| 347 |
0.08% max |
2.00% max |
0.045% max |
0.030% max |
1.00% max |
17.00-19.00% |
9.00-13.00% |
Physical Constants
| Density | 0.285 lbs/in3 |
| Density | 7.89 g/cm3 |
Heating
| Forging | 2100-2250ºF finish above 1700ºF |
| Annealing | 1850-2000ºF then water 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 max. X 96" long | 2600 lbs. |
| Blocks | 14" X 14" X 14" | 750 lbs. |
| Shafts | 12" Dia. max. X 96" long | 2600 lbs. |
