Professional Respect Integrity Flexibility
pRODUCT
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S31803 /2205 /F51/1.4462 Super Duplex stainless steel
|
Name |
OD |
Thickness |
Length |
|
Seamless tube |
Φ6~630 |
1~50 |
specified or non-specified |
|
Round bar |
Φ8~250 |
|
specified or non-specified |
|
Fastener |
M8~M200 |
|
|
S31803 /2205 /F51/1.4462 Super Duplex stainless steel Chemical Composition
|
Grade |
C |
Mn |
Si≤ |
S |
P |
Cr |
Ni |
Mo |
N |
PREN |
|
S31803(2205) |
0.03 |
2.0 |
1.0 |
0.02 |
0.03 |
21-23 |
4.5-6.5 |
2.5-3.5 |
0.08-0.2 |
35 |
S31803 /2205 /F51/1.4462 Super Duplex stainless steel Mechanical Properties
|
Grade
|
Heat treatment
|
Tesile Strength
|
Yield Strength
|
A%
|
Reduction
|
Hardness |
|
Brinell |
||||||
|
|
1020 |
620 |
450 |
25 |
45 |
≤293 |
S31803 Producing Standard
|
Specification |
Seamless and welded tube |
Bar |
Sheet/strip |
Forging |
Casting |
|
S31803(2205)F51 |
ASTM A789 |
ASTM A276 |
ASTM A240 |
ASTM A473 |
ASTM A351 |
31803 Properties Introduction
Duplex 31803 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It also demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments.
The following are the properties of 31803:
Stainless ferritic-austenitic Cr-Ni-Mo steel with nitrogen addition.
High corrosion resistance, especially against stress corrosion cracking in solutions containing chloride.
Good strength properties.
Resistant to intergranular corrosion in the temperature range up to 300°C.
Heat treatment subsequent to welding not necessary.
Surface condition for optimum corrosion resistance: pickled, heat treated free from scale or machined.
