Introduction of Alloy UNS S31254/1.4547/6MO/ F44 Corresponding Standards: UNS S31254, EN 1.4547, ASTM A182 Grade F44
UNS S31254 is an austenitic stainless steel with low carbon content which reduces the possibility of precipitation of chromium carbides in the sensitization temperature range. The alloy stainless steel pipe.contains elevated nitrogen, chromium, nickel, and 6% to 6.5% molybdenum by weight. The nitrogen addition provides higher yield and tensile strengths, however the alloy is readily cold worked. S31254 exhibits excellent resistance to uniform corrosion and good resistance to pitting corrosion. The nickel and molybdenum contents of S31254 result in improved stress corrosion cracking resistance compared to other austenitic stainless pipe.
Chemical Composition
| WEIGHT% |
C |
SI |
MN |
S |
P |
CR |
NI |
MO |
N |
CU |
| MIN. |
19,50 |
17,50 |
6,00 |
0,18 |
0,50 |
|||||
|
MAX |
0,020 |
0,80 |
1,00 |
0,010 |
0,030 |
20,50 |
18,50 | 6,50 |
0,22 |
1,00 |
Mechanical Properties
|
YIELD STRENGTH |
TENSILE STRENGTH |
ELONGATION |
HARDNESS |
IMPACT |
PRE |
|
|
≥ 300 |
650 – 850 |
≤ 260 |
≥ 35 |
≥ 45 |
≥ 40 |
Heat Treatment
Solution annealing at min 1150°C followed by water quenching
Weldability
Very good.
Applications:
• High resistance to general corrosion.
•Typical applications: Pumps, valves, chokes, pipe work/flanges and manifolds in oil and gas industry.
OUR CERTIFICATION
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