ASTM A790 S31803 Duplex Seamless And Welded Pipe Corrosion Resistant
UNS S31803, F51, 1.4462 duplex stainless steel is designed to combine improved resistance to stress corrosion cracking, pitting, crevice corrosion and high strength when compared with other stainless alloys.
These attributes mean that Duplex UNS S31803, F51, 1.4462 can be used successfully as an alternative to standard stainless steel specifications in applications where higher strength and resistance to stress corrosion cracking is required.
Chemical Composition of S31803
Property | Value |
---|---|
Carbon | 0.03% |
Chromium | 21-23% |
Manganese | 2% |
Molybdenum | 2.5-3.5% |
Nickel | 4.5-6.5% |
Nitrogen | 0.08-0.02% |
Phosphorus | 0.03% |
Silicon | 1% |
Sulfur | 0.02% |
Mechanical Behaviour
Property | Value | |
---|---|---|
Tensile Strength, min, ksi, [MPa] | 90 [ 620] | |
Yield Strength, min, ksi [MPa] | 65 [450] | |
Elongation in 2 in. or 50mm, min, % | 25 | |
Hardness, max | HBW | HRC |
290 | 30 |
Tolerances Of ASTM A790 UNS S31803 Pipe
NPS Designator | Permissible Variations in Outside Diameter | |
---|---|---|
Over In. | Under In. | |
1/8 to 1-1/2, incl | 1/64 (0.015) | 1/32 (0.031) |
Over 1-1/2 to 4, incl | 1/32 (0.031) | 1/32 (0.031) |
Over 4 to 8, incl | 1/16 (0.062) | 1/32 (0.031) |
Over 8 to 18, incl | 3/23 (0.093) | 1/32 (0.031) |
Pressure Rating
Pipes O.D. (in.) | Duplex Steel 2205 Pipe Wall Thickness of Pipe (inches) | |||||||
---|---|---|---|---|---|---|---|---|
.035 | .109 | .028 | .065 | .049 | .095 | .083 | .120 | |
1/4 | 4800 | 3700 | 9500 | 7000 | ||||
1/8 | 10100 | 7900 | ||||||
3/8 | 3100 | 6100 | 4400 | |||||
5/16 | 3700 | 7300 | 5400 | |||||
3/4 | 3000 | 2200 | 4600 | 4000 | ||||
1/2 | 2300 | 4400 | 3200 | |||||
1 | 3900 | 2200 | 3400 | 2900 | 4300 |
Duplex Stainless Steel Features
Duplex stainless steels have Austenitic and Ferritic stainless steel microstructure, and possess properties in two groups stainless steel, however, there are different.
Versus Austenitic
Versus Ferritic
APPLICATIONS:
· Chemical processing, transportation and storage
· Oil and gas exploration and offshore drilling rigs
· Oil and gas refining
· The marine environment
· Pollution control equipment
· Pulp and paper manufacturing
· Chemical process plant