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Datasheet of duplex stainless steel

Datasheet of duplex stainless steel

In this article, experts from Mirach Metallurgy Co.,Limited share the detail info of duplex stainless steel. If you are looking for duplex stainless steel and its related products, see its feature below first.

duplex-stainless-steel

Key Properties

These properties are specified for flat rolled product (plate, sheet and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as pipe and bar in their respective specifications.

Composition

Typical compositional ranges for grade 2205 stainless steels are given in table 1.

Table 1. Composition ranges for 2205 grade stainless steels.

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

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

Mechanical Properties

Typical mechanical properties for grade 2205 stainless steels are given in table 2.

Table 2. Mechanical properties of 2205 grade stainless steels

Grade

Tensile Str
(MPa) min

Yield Strength
0.2% Proof
(MPa) min

Elongation
(% in 50mm) min

Hardness

Rockwell C (HR C)

Brinell (HB)

2205

620

450

25

31 max

293 max

Note: Mechanical property requirements for S31803 and S32205 are identical.

Physical Properties

Typical physical properties for grade 2205 stainless steels are given in table 3.

Table 3. Typical annealed condition physical properties for 2205 grade stainless steels

Grade

Density
(kg/m3)

Elastic
Modulus

(GPa)

Mean Co-eff of Thermal
Expansion (mm/m/°C)

Thermal
Conductivity (W/m.K)

Specific
Heat
0-100°C

( J/kg.K)

Electrical
Resistivity
(nW.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

2205

7805

200

13.7

14.7

19

450

850

Note: Physical properties of S31803 and S32205 are identical.

Grade Specification Comparison

Approximate grade comparisons for 2205 stainless steels are given in table 4.

Table 4. Grade specification comparisons for 2205 grade stainless steels

Grade

UNS
No

Old British

Euronorm

Swedish

SS

Japanese

JIS

BS

En

No

Name

2205

S31803 / S32205

318S13

1.4462

X2CrNiMoN22-5-3

2377

SUS 329J3L

Note: These comparisons are approximate only. The list is intended as a comparison of functionally similar materialsnot as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Possible Alternative Grades

Possible alternative grades to grade 2205 stainless steels are given in table 5.

Table 5. Grade specification comparisons for 2205 grade stainless steels

Grade Why it might be chosen instead of 2205
904L Better formability is needed, with similar corrosion resistance and lower strength.
UR52N+ High resistance to corrosion is required, eg resistance to higher temperature seawater.
6%Mo Higher corrosion resistance is required, but with lower strength and better formability.
316L The high corrosion resistance and strength of 2205 are not needed… 316L is lower cost.