Product Name

Heat Exchanger Tubes

Manufacturing Mode

Welding

Brand Name

KORER

Standard

ASTM A789

Duplex Material Grade

S31803 / S2205 /S32304

Delivery Condition

Bright Annealing Or Pickled

A789 Specification for seamless and welded Ferritic/Austenitic stainless steel tubing for General Service

Item

Contents

Requirements

1

Materail

S32101,S32205,S31803,S32304,S32750, S32760

2

Welding Method

Seamless Or Automatic Welding Process With No Addition Of Filler Metal During The Welding Process

3

Chemical Composition

Acc.to A789 and A480

4

Heat Treatment

Annealing Acc.to Table 3 In ASTM A789

5

Straightness

Depends on Requirements of Buyer

6

Tolerance

OD / WT / Length :Acc.to Table 5

7

Mechanical Property

Tension Test, Flattening Test, Expansion Test, Flange Test(For Weld Tube), Reverse-Bend Test, Hydrostatic or Other Nondestructive Test

Grade

Chemical Composition(%)

Remark

C≤

Mn

P≤

S≤

Si

Ni

Cr

Mo

N

Cu

S31803

0.03

≤2.0

0.03

0.02

≤1.0

4.50~6.50

21.0~23.0

2.50~3.50

0.08~0.20

…

…

S32205

0.03

≤2.0

0.03

0.02

≤1.0

4.50~6.50

22.0~23.0

3.0~3.5

0.14~0.20

…

…

S31500

0.03

1.20
~2.0

0.03

0.03

1.4~2.0

4.50~5.25

18.0~19.0

2.5~3.0

0.05~0.1

…

…

S32550

0.04

≤1.5

0.04

0.03

≤1.0

4.50~6.50

24.0~27.0

2.9~3.9

0.10~0.25

1.5~2.5

…

S31200

0.03

≤2.0

0.045

0.03

≤1.0

5.50~6.50

24.0~26.0

1.2~2.0

0.14~0.20

…

…

S31260

0.03

≤1.0

0.03

0.03

≤0.75

5.50~7.50

24.0~26.0

2.5~3.5

0.10~0.30

0.20~0.8

W0.10~0.50

S32001

0.03

4.0
~6.0

0.04

0.03

≤1.0

1.0~3.0

19.5~21.5

≤0.60

0.05~0.17

≤1.00

…

S32304

0.03

≤2.50

0.04

0.04

≤1.0

3.0~5.5

21.5~24.5

0.05~0.60

0.05~0.20

0.05~0.6

…

S39274

0.03

≤1.0

0.03

0.02

≤0.80

6.0~8.0

24.0~26.0

2.50~3.50

0.24~0.32

0.20~0.8

W1.50~2.50

S32750

0.03

≤1.2

0.035

0.02

≤0.80

6.0~8.0

24.0~26.0

3.0~5.0