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Customized Hard Flat Duplex Stainless Steel CCS Classification Natural Color

Categories Stainless Steel Sheet Metal
Brand Name: JIN LAI
Model Number: S31803/ S32205
Certification: ISO SGS
Place of Origin: CHINA
MOQ: 1 ton
Price: negotiable based on the quantity
Payment Terms: T/T, Western Union, L/C
Supply Ability: 800 tons per month
Delivery Time: within 15-20 days after deposit
Packaging Details: Standard seaport packing or as customized
Standard: AISI, ASTM, BS, DIN, GB, JIS
Width: 1240-2000mm
Length: 1000-6000mm or customized
Thickness: 0.3-3mm
Port: Shanghai
Type: Steel plate
Edge: Slit edge or mill edge
Grade: S31803/ S32205
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    Customized Hard Flat Duplex Stainless Steel CCS Classification Natural Color

    CCS Classification Duplex Stainless Steel Plate S31803/ S32205 Uns S31803

    Duplex 2205 Stainless Steel Chemical Composition

    Fe, <0.03% C, 21-23% Cr, 4.5-6.5% Ni, 2.5-3.5% Mo, 0.8-2.0% N, <2% Mn, <1% Si, <0.03% P, <0.02% S

    Duplex 2205 Stainless Steel Introduction

    Duplex 2205 stainless steel (both ferritic and austenitic) is used extensively in applications that require good corrosion resistance and strength. The S31803 grade stainless steel has undergone a number of modifications resulting in UNS S32205, and was endorsed in the year 1996. This grade offers higher resistance to corrosion. At temperatures above 300°C, the brittle micro-constituents of this grade undergo precipitation, and at temperatures below -50°C the micro-constituents undergo ductile-to-brittle transition; hence this grade of stainless steel is not suitable for use at these temperatures.

    Duplex 2205 Stainless Steel Key Properties

    The properties that are mentioned in the below tables pertain to flat rolled products such as plates,

    sheets and coils of the ASTM A240 or A240M. These may not be uniform across other products

    such as bars and pipes.

    Duplex 2205 Stainless Steel Composition

    Table 1 provides the compositional ranges for grade 2205 duplex stainless steel.

    Table 1 - Composition ranges for 2205 grade stainless steels

    GradeCMnSiPSCrMoNiN
    2205 (S31803)

    Min

    Max

    -

    0.030

    -

    2.00

    -

    1.00

    -

    0.030

    -

    0.020

    21.0

    23.0

    2.5

    3.5

    4.5

    6.5

    0.08

    0.20

    2205 (S32205)

    Min

    Max

    -

    0.030

    -

    2.00

    -

    1.00

    -

    0.030

    -

    0.020

    22.0

    23.0

    3.0

    3.5

    4.5

    6.5

    0.14

    0.20

    Duplex 2205 Stainless Steel Mechanical Properties

    The typical mechanical properties of grade 2205 stainless steels are listed in the table below.

    Grade S31803 has similar mechanical properties to that of S32205.

    Table 2 - Mechanical properties of 2205 grade stainless steels

    GradeTensile Str
    (MPa) min
    Yield Strength
    0.2% Proof
    (MPa) min
    Elongation
    (% in 50mm) min
    Hardness
    Rockwell C (HR C)Brinell (HB)
    22056214482531 max293 max

    Duplex 2205 Stainless Steel Physical Properties

    The physical properties of grade 2205 stainless steels are tabulated below. Grade S31803 has similar physical properties to that of S32205.

    Table 3 – Physical properties of 2205 grade stainless steels

    GradeDensity
    (kg/m3)

    Elastic
    Modulus

    (GPa)

    Mean Co-eff of Thermal
    Expansion (μm/m/°C)
    Thermal
    Conductivity (W/m.K)

    Specific
    Heat
    0-100°C

    ( J/kg.K)

    Electrical
    Resistivity
    (nΩ.m)
    0-100°C0-315°C0-538°Cat 100°Cat 500°C
    220578219013.714.2-19-418850

    Duplex 2205 Stainless Steel Grade Specification Comparison

    Table 4 provides the grade comparison for 2205 stainless steels. The values are a comparison of functionally similar materials. Exact equivalents may be obtained from the original specifications.

    Table 4 - Grade specification comparisons for 2205 grade stainless steels

    GradeUNS
    No
    Old BritishEuronorm

    Swedish

    SS

    Japanese

    JIS

    BSEnNoName
    2205S31803 / S32205318S13-1.4462X2CrNiMoN22-5-32377SUS 329J3L

    Duplex 2205 Stainless Steel Possible Alternative Grades

    Given below is a list of possible alternative grades, which may be chosen in place of 2205.

    Table 5 - Grade specification comparisons for 2205 grade stainless steels

    GradeReasons for choosing the grade
    904LBetter formability is needed, with similar corrosion resistance and lower strength.
    UR52N+High resistance to corrosion is required, e.g. resistance to higher temperature seawater.
    6%MoHigher corrosion resistance is required, but with lower strength and better formability.
    316LThe high corrosion resistance and strength of 2205 are not needed. 316L is lower cost.

    Duplex 2205 Stainless Steel Corrosion Resistance

    Grade 2205 stainless steel exhibits excellent corrosion resistance, much higher than that of grade 316. It resists localized corrosion types like intergranular, crevice and pitting. The CPT of this type of stainless steel is around 35°C. This grade is resistant to chloride stress corrosion cracking (SCC) at temperatures of 150°C. Grade 2205 stainless steels are apt replacements to austenitic grades, especially in premature failure environments and marine environments.

    Duplex 2205 Stainless Steel Heat Resistance

    The high oxidation resistance property of Grade 2205 is marred by its embrittlement above 300°C. This embrittlement can be modified by a full solution annealing treatment. This grade performs well at temperatures below 300°C.

    Duplex 2205 Stainless Steel Heat Treatment

    The best suited heat treatment for this grade is solution treatment (annealing), between 1020 - 1100°C, followed by rapid cooling. Grade 2205 can be work hardened but cannot be hardened by thermal methods.

    Duplex 2205 Stainless Steel Welding

    Most standard welding methods suit this grade, except welding without filler metals, which results in excess ferrite. AS 1554.6 pre-qualifies welding for 2205 with 2209 rods or electrodes so that the deposited metal has the right balanced duplex structure.

    Adding nitrogen to the shielding gas ensures that adequate austenite is added to the structure. The heat input must be maintained at a low level, and the use of pre or post heat must be avoided. The co-efficient of thermal expansion for this grade is low; hence the distortion and stresses are lesser than that in austenite grades.

    Duplex 2205 Stainless Steel Machining

    The machinability of this grade is low due to its high strength. The cutting speeds are almost 20% lower than that of grade 304.

    Duplex 2205 Stainless Steel Fabrication

    The fabrication of this grade is also affected by its strength. Bending and forming of this grade requires equipment with larger capacity. Ductility of grade 2205 is lesser than austenitic grades; therefore, cold heading is not possible on this grade. In order to carry out cold heading operations on this grade, intermediate annealing should be carried out.

    Duplex 2205 Stainless Steel Applications

    Some of the typical applications of duplex steel grade 2205 are listed below:

    • Oil and gas exploration
    • Processing equipment
    • Transport, storage and chemical processing
    • High chloride and marine environments
    • Paper machines, liquor tanks, pulp and paper digesters

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