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Name: | Alloy 20 - UNS N08020 |
Carpenter 20 or Alloy 20 is an austenitic stainless steel that has excellent resistance to hot sulfuric acid and is prone to corrosion of Type 316 stainless steel in many aggressive environments. Excellent resistance to stress corrosion cracking. Can be welded, machined and cold formed. The preferred alloy for sulfuric acid.
C |
Mn |
P |
S |
Si |
Cr |
Ni |
.06 max |
2.00 max |
0.035 max |
0.035 max |
1.00 max |
19.0 -21.0 |
32.5 -35.0 |
Mo |
Cu |
Fe |
|
|
|
|
3.0 - 4.0 |
8 X C Min/!.0 max Cb + Ta |
bal |
|
|
|
Alloy 20 available formats
Trade Name |
Alloy® 20 |
UNS # |
N08020 |
Seamless Pipe / Tube |
B/SB729 |
Welded Pipe / Tube |
B/SB464 |
B/SB468 |
|
B474 |
|
A/SA358 |
|
Buttweld Fittings* |
B/SB366 |
Grade |
|
WP20CB |
|
Forged Valves |
B/SB462 |
A/SA182 |
|
F20 |
|
Forged Fittings |
B/SB462 |
A/SA182 |
|
F20 |
|
B/SB462 |
|
A/SA182 |
|
F20 |
|
Plate |
B/SB463 |
A/SA240 |