UNS S31254 254SMO is a super Austenitic Stainless Steel.
ASTM A312 UNS S31254 254SMO Stainless steel Pipe shall consist of heating the pipe to a minimum temperature of 1900°F [1040°C] and quenching in water or rapidly cooling by other means.
UNS S31254 254SMO Stainless steel Pipe Chemical Requirements
| Grade |
UNS |
C≤ |
Mn |
P≤ |
S≤ |
Si≤ |
Cr |
Mo |
Ni |
Cu |
| 254SMO |
S31254 |
0.02 |
1 |
0.03 |
0.01 |
0.8 |
19.5-20.5 |
6.0-6.5 |
17.5-18.5 |
0.5-1.0 |
ASTM A312 UNS S31254 Stainless steel Pipe Tensile Requirements
| Grade |
Tensile, min, ksi[MPa] |
Yield, min, ksi[MPa] |
Elongation, %(min) |
Hardness, HB（max） |
| S31254 |
98【675】 |
43【310】 |
35 |
220 |
Except the basic size, PMI, Length requirement, these
ASTM A312 UNS S31254 Pipes should meet Transverse Tension Tests, Flattening Test, Etching Test, Radiographic Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test according to the customer"s requirement.
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