The 17-4PH alloy is a martensitic
precipitation hardening chrome-nickel stainless steel
with Cu and Cb/Nb additions.
The 17-4PH alloy retains its mechanical
strength up to 550 F.
The alloy is rated for good oxidation resistance to 900 F.
In the annealed
condition, 17-4PH has good machinability, similar to that of 304
stainless steel.
|
Composition
Specifications
for 17-4PH |
Element
|
Min
|
Max
|
Chromium
|
15.50
|
16.70
|
Nickel
|
3.60
|
4.60
|
Copper |
2.80 |
3.50 |
Silicon
|
0.50
|
1.00
|
Columbium
|
0.15
|
0.40
|
Phosphorus
|
--
|
0.025
|
Sulfur
|
--
|
0.025
|
Carbon
|
--
|
0.06
|
Manganese
|
--
|
0.70
|
Per AMS5355H |