Welding Heat Exchanger Stainless Steel Piping 304 / 316L SS Tubes ASTM A249

Grade

Chemical Composition(%)

Remark

C≤

Mn≤

P≤

S≤

Si≤

Cr

Ni

Mo

N

Cu

304

0.08

2.00

0.045

0.030

0.75

18.0~20.0

8.0~10.50

0~0.1

304L

0.030

2.00

0.045

0.030

0.75

18.0~20.0

8.0~12.0

0~0.1

316

0.08

2.00

0.045

0.030

0.75

16.0~18.0

10.0~14.0

2.0~3.0

0~0.1

316L

0.030

2.00

0.045

0.030

0.75

16.0~18.0

10.0~14.0

2.0~3.0

0~0.1

SA249 Standard Specification For Welded Austenitic Steel Boiler,Superheater, Heat-Exchanger And Condenser Tubes.

Item

Contents

Requirements

1

Chemical Composition

Acc.to SA249 and SA480

2

Welding method

TIG Welding

3

Materail

TP304, TP304L, TP304H, TP310S, TP316, TP316L, TP316TI, TP316H, TP317L, TP321

4

Straightness

0.8mm/900mm

5

Tolerance

OD acc.to A1016/A1016M,WT 10%

6

Heat Treatment

Bright Annealing Temperature 1040℃

7

Mechanical Property

Mechanical Property:Enlongation 45%-65%

Expansion Test:Acc.To ASTM A249 & ASTM A1016

Flange Test: Acc.To ASTM A249 & ASTM  A1016

Flattening Test: Acc.To ASTM A249 & ASTM  A1016

Hardness:HRB 75-90

1.  Pipes for Liquid Delivery.

2.  Tubes for Power Industry(Thermal Power and Nuclear Power Staition)

and Petrochemical Industry:Boiler, Heat-sink, Condenser and Heat-exchanger tubes

3.  Tubes for Automotive Industry:Oil tube and