S32205 Duplex Stainless Steel S32205 Alloy Material F51 Duplex
Material 2205 Technical Data Sheet
Description:
Duplex 2205 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.
2205 stainless steel plate, 2205 stainless steel, duplex stainless
steel 2205, 2205 stainless steel material, is a Swedish stainless
steel grade.
The difference between two-phase 2205 stainless steel plate and
austenitic 304 stainless steel plate
1) The yield strength is more than double that of ordinary
austenitic stainless steel, and it has the need for molding.
Sufficient plastic toughness. The thickness of the tank or pressure
vessel made of duplex stainless steel is 30-50% lower than the
commonly used austenite, which is beneficial to reduce the cost.
2) It has excellent resistance to stress corrosion cracking. Even
the duplex alloy with the lowest alloy content has higher
resistance to stress corrosion cracking than austenitic stainless
steel, especially in the environment containing chloride ions.
Stress corrosion is a prominent problem that is difficult to solve
in ordinary austenitic stainless steels.
3) The most common 2205 duplex stainless steel used in many media
has better corrosion resistance than ordinary 316L austenitic
stainless steel, while super duplex stainless steel has high
corrosion resistance. In some media, such as acetic acid and formic
acid. It can even replace high-alloy austenitic stainless steels
and even corrosion-resistant alloys.
4) It has good local corrosion resistance and is superior to
austenitic stainless steel in corrosion resistance and fatigue
corrosion resistance compared with austenitic stainless steel with
equivalent alloy content.
5) Compared with austenitic stainless steel, it has a lower
coefficient of linear expansion and is close to carbon steel. It is
suitable for connection with carbon steel and has important
engineering significance, such as producing composite plates or
linings.
6) Compared with austenitic stainless steel under dynamic or static
load conditions, it has higher energy absorption capacity. This
pair of structural parts can cope with unexpected accidents such as
collisions and explosions. Duplex stainless steel has obvious
advantages and has practical application value.
Machinability:
Duplex 2205 is somewhat more difficult to machine than the 300
series austenitic stainless steels. Higher cutting forces are
required and more rapid tool wear is typical. Some guidelines for
machining are: A) Use powerful, rigid machines with extremely
strong rigid mounting of tools and work piece, B) Minimize
vibration by keeping the tool extension as short as possible, C)
Use a nose radius on the tool, no longer than necessary, for
carbides that have a sharp edge while still providing adequate
strength, D) Design machining sequences to always provide for a
depth of cut below the work hardened layer resulting from the
previous passes.
Composition Specification (%)
| C | Mn | Si | P | S | Cr | Mo | Ni | N |
2205
(S31803) | 0.03
max | 2.0
max | 1.0
max | 0.03
max | 0.02
max | min: 21.0
max: 23.0 | min: 2.5
max: 3.5 | min: 4.5
max: 6.5 | min: 0.08
max: 0.20 |
2205
(S32205) | 0.03
max | 2.0
max | 1.0
max | 0.03
max | 0.02
max | min: 22.0
max: 23.0 | min: 3.0
max: 3.5 | min: 4.5
max: 6.5 | min: 0.14
max: 0.20 |
Mechanical Property Specification
| Grade | Tensile Strength
ksi (min) | Yield Strength
0.2% ksi (min) | Elongation % | Hardness (HB) MAX |
| S31803 | 620 | 450 | 25 | 293 |
| S32205 | 655 | 450 | 25 | 293 |
Applications:
Chemical processing, transport and storage – pressure vessels,
tanks, piping, and heat exchangers
Oil and gas exploration and processing equipment – piping, tubing,
and heat exchangers
Marine and other high chloride environments
Effluent scrubbing systems
Pulp and paper industry – digesters, bleaching equipment, and
stock-handling systems
Cargo tanks for ships and trucks
Food processing equipment
Biofuels plants
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