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A249/SA249

Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
Grades:TP304H, TP309H, TP309HCb, TP310H, TO310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP309S, TP309Cb, TP310S, TP310Cb, TP316, TP321, TP347, and TP348, and are intended for high-temperature service such as for superheaters and reheaters.

Description

Grade

Specification

Stainless 304/304L, 304/304H

ASTM A249/SA249

Stainless 309S

ASTM A249/SA249

Stainless 310S

ASTM A249/SA249

Stainless 316/316L, 316/316H

ASTM A249/SA249

Stainless 317/317L

ASTM A249/SA249

Stainless 321/321H

ASTM A249/SA249

Stainless 347/347H

ASTM A249/SA249

CHEMICAL COMPOSITION

Grade

UNS

Composition, %

Design

C

Mn

P

S

Si

Cr

Ni

Mb

Ti

Nb

N

Cu

Ce

B

Al

TP304

S30400

0.08

2

0.045

0.03

1

18.0–20

8.0–11

. . .

. . .

. . .

. . .

. . .

. . .

 

 

TP304L

S30403

0.035

2

0.045

0.03

1

18.0–20

8.0–13

. . .

. . .

. . .

. . .

. . .

. . .

 

 

TP304H

S30409

0.04 – 0.1

2

0.045

0.03

1

18.0–20

8.0–11

. . .

. . .

. . .

. . .

. . .

. . .

 

 

TP310S

S31008

0.08

2

0.045

0.03

1

24.0- 26

19.0- 22

0.8

. . .

. . .

. . .

. . .

. . .

 

 

TP310H

S31009

0.04 – 0.1

2

0.045

0.03

1

24.0–26

19.0–22

. . .

. . .

. . .

. . .

 

. . .

 

 

TP310H

S31035

0.04 – 0.1

0.6

0.025

0.015

0.4

21.5–23.5

23.5–26.5

. . .

. . .

0.40- 0.6

0.20- 0.3

2.5- 3.5

. . .

0.002- 0.008

 

TP316

S31600

0.08

2

0.045

0.03

1

16.0–18

10.0–14

2.00–3

. . .

. . .

. . .

. . .

. . .

 

 

TP316L

S31603

0.035

2

0.045

0.03

1

16.0–18

10.0–14

2.00–3

. . .

. . .

. . .

. . .

. . .

 

 

TP316H

S31609

0.04 – 0.1

2

0.045

0.03

1

16.0–18

10.0–14

2.00–3

. . .

. . .

. . .

. . .

. . .

 

 

TP317

S31700

0.08

2

0.045

0.03

1

18.0–20

11.0–15

3.0–4

. . .

. . .

. . .

. . .

. . .

 

 

TP317L

S31703

0.035

2

0.045

0.03

1

18.0–20

11.0–15

3.0–4

. . .

. . .

. . .

. . .

. . .

 

 

TP321

S32100

0.08

2

0.045

0.03

1

17.0–19

9.0–12

. . .

Ti 5 × (C+N) min, 0.70 max

. . .

0.1

. . .

. . .

 

 

TP321H

S32109

0.04 – 0.1

2

0.045

0.03

1

17.0–19

9.0–12

. . .

4(C+N) min; 0.70 max

. . .

0.1

. . .

. . .

 

 

TP321H

S32654

0.02

2.0-4

0.03

0.005

0.5

24.0–25

21.0–23

7.0-8

. . .

. . .

0.45- 0.55

0.30-0.6

. . .

 

 

TP321H

S33228

0.04 – 0.08

1

0.02

0.015

0.3

26.0–28

31.0–33

. . .

. . .

0.60- 1

. . .

. . .

0.05 – 0.1

 

0.025

TP321H

S34565

0.03

5.0-7

0.03

0.01

1

23.0–25

16.0–18

4.0-5

. . .

0.1

0.40- 0.6

. . .

. . .

 

 

TP347

S34700

0.08

2

0.045

0.03

1

17.0–19

9.0–13

. . .

. . .

See Spec

. . .

. . .

. . .

 

 

TP347H

S34709

0.04 – 0.1

2

0.045

0.03

1

17.0–19

9.0–13

. . .

. . .

See Spec

. . .

. . .

. . .

 

 

TP348

S34800

0.08

2

0.045

0.03

1

17.0–19

9.0–13

 

. . .

. . .

. . .

. . .

. . .

. . .

Co 0.20, Ta 0.10

TP348H

S34809

0.04-0.10

2

0.045

0.03

1

17.0–19.0

9.0–13

. . .

. . .

. . .

. . .

. . .

. . .

. . .

Co 0.20, Ta 0.10

 

 

OD

WTH

L

ASTM A249

<25.4mm

±0.10mm

±10.00%

OD<50.8mm +3.0mm -0mm

≥25.4mm-38.1mm

±0.15mm

≥38.1mm-50.8mm

±0.20mm

≥50.8mm-63.5mm

±0.25mm

≥63.5mm-76.2mm

±0.30mm

OD≥50.8mm +5.0 -0mm

≥76.2mm-101.6mm

±0.38mm

≥101.6mm-190.5mm

+0.38mm -0.64mm

≥190.5mm-228.6mm

+0.38mm -1.14mm


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