ASTM A 269 – 96: Seamless and Welded Austenitic Stainless Steel Tubing for General Service

ASTM A 269 – 96

Seamless and Welded Austenitic Stainless Steel Tubing for General Service

This specification covers nominal wall thickness austenitic stainless steel tubing for general corrosion resisting and low or high temperature service.

Dimensions and Tolerances

  • Dimensions. Tube sizes and wall thickness usually furnished to this specification are: – 1/4 in (6.4 mm) ID and larger. – 0.020 in (0.51 mm) nominal wall thickness and heavier.

  • Cut Length. No tube may be shorter than specified. For tube <11/2 in (38.1 mm) cut length may be up to 1/8 in (3 mm) longer than specified. For tube >11/2 in (38.1 mm) cut range may be up to 3/16 in (4.8 mm) longer than specified. These tolerances are increased by 1/8 in (3 mm) for every 10 ft (3 m) over 24 ft (7.3 m), up to a maximum tolerance of 1/2 in (13 mm).

    Cross-sectional tolerances

    Outside Diameter (OD)

    Wall Thickness (t)

    Variations in OD

    Variation in t

    Ovalitymax

    Under

    Over

    Under

    Over

    in

    mm

    in

    mm

    in

    mm

    in

    mm

    %

    %

    in

    mm

    <1/2

    <12.7

    All

    All

    0.005

    0.13

    0.005

    0.13

    15

    15

    0.010

    0.26

    1/to

    <11/2

    12.7 to

    <38.1

    >0.065

    >1.6

    0.005

    0.13

    0.005

    0.13

    10

    10

    0.010

    0.26

    1/to

    <11/2

    12.7 to

    <38.1

    <0.0651

    <1.61

    0.005

    0.13

    0.005

    0.13

    10

    10

    0.020

    0.5

    11/2

    to

    <31/2

    38.1 to

    <88.9

    >0.095

    >2.4

    0.010

    0.25

    0.010

    0.25

    10

    10

    0.020

    0.5

    11/2

    to

    <31/2

    38.1 to

    <88.9

    <0.0951

    <2.41

    0.010

    0.25

    0.010

    0.25

    10

    10

    0.040

    1.0

    31/2

    to

    <51/2

    88.9 to

    <139.7

    >0.150

    >3.8

    0.015

    0.38

    0.015

    0.38

    10

    10

    0.030

    0.76

    31/2

    to

    <51/2

    88.9 to

    <139.7

    <0.1501

    <3.81

    0.015

    0.38

    0.015

    0.38

    10

    10

    0.060

    1.54

    51/2

    to

    <8

    139.1

    to

    <203.2

    >0.150

    >3.8

    0.030

    0.76

    0.030

    0.76

    10

    10

    0.060

    1.54

    51/2

    to

    <8

    139.1

    to

    <203.2

    <0.1501

    <3.81

    0.030

    0.76

    0.030

    0.76

    10

    10

    0.120

    3.08

    >0.753

    >193

    12.5

    12.5

    Notes

    1 Thin walled tubes. Therefore ovality tolerance increases, but mean OD at a cross section must be within permissible variation. 2 Ovality = Difference between maximum and minimum OD

    3 Or tubing with ID < 60% of OD

    Manufacture

  • Materials. Refer to chemical composition table.

  • Manufacture. Seamless or welded, hot or cold finished.

  • Heat Treatment. Refer to heat treatment table and supplementary requirements S1 and S3.

  • Marking. ASTM tube general requirements, page 3-5, apply, plus indication whether the tube is seamless or welded. Also: HT temp

    = final heat treatment temperature if under 1900 °F (1040 °C), NDE = Nondestructive electric test performed.

    Ordering Information

    Item

    Notes

    Specification number

    A 269 – 96

    Size

    Outside diameter and nominal wall

    thickness

    Quantity

    Random or specified lengths. Total length or number of lengths.

    Name of material

    Seamless or welded austenitic stainless steel tubes

    Grade

    Selected from chemical composition table

    Test report

    DIN 50049.3.1.B Standard, or DIN 50049.3.1.C optional (3rd party witness test) at extra cost

    Options and supplementary requirements

    Refer to optional and supplementary requirements S1 to S4

    Note

    – The above table is based on ASTM requirements except with regard to test reports, where standard practice options are added. See also page 10-2 for ISO based ordering and general delivery information.

    Finish and Repair

  • Finish. Tubes to be pickled, free of scale. Where bright annealed, pickling is not necessary.

  • Repair. ASTM tube general requirements, page 3-6, apply

    Mandatory Testing

  • Product Analysis. One billet or one length of flat rolled stock or one tube made from each heat to conform to chemical composition table.

  • Flaring Test for seamless tubes or Flange Test for welded Tubes. One specimen to be tested from one end of one tube from each heat treated lot.

  • Hardness Test. One specimen to be tested from two tubes from each heat treated lot. See the hardness requirements table and Exceptions (bullet) following.

  • Reverse Flattening Test. Welded tubes only. One specimen from each 1500 ft (460 m) of finished tubing. Coiled tubing >1500 ft (460 m) (without circumferential butt welds) is sampled at both ends.

  • Hydrostatic or Nondestructive Tests. Each tube to be tested.

  • Exceptions. Tubing with wall thickness t<0.065 in (1.65 mm) may be tested using Rockwell superficial hardness or Vickers test. Tubes with inside diameter ID <1/4 in (6.4 mm) or t<0.020 in (0.51 mm) need not be hardness tested. Smaller tubes are tension tested only as for tube standard ASTM A 632 – 90 (see page 3-43).

  • Lot Sizes. A lot is all tubes of same size from same heat of steel and same heat treatment. For tubes heat treated by continuous process a lot is up to 125 lengths for ODs <1 in

    Optional Tests and Supplementary Requirements

  • Hydrostatic or Nondestructive Electric Testing.

  • Final Heat Treatment at under 1900°F (1040°C) may be specified for special service characteristics.

  • S1 Stress-Relieved Annealed Tubes. Tubes in grades TP304L, TP316L, TP321, TP347 and TP348 may be specified in this condition to improve stress corrosion resistance. Heat treat at 1550 °F (845 °C) to 1650 °F (900 °C) after roll straightening. Cool in air or by slow cooling. No further mechanical straightening is permitted. Tube straightness is as agreed with purchaser.

  • S1 Air Underwater Pressure Test. Tube tested to 150 psi (1034 kPa) minimum underwater.

  • S1 Stabilisation Heat Treatment. Tubes in grades TP321, TP347 and TP348 may be given this treatment using a temperature lower than that used for initial solution annealing heat treatment, as agreed with purchaser.

  • S1 Intergranular Corrosion Test, in accordance with Practice A262 Practice E. If this test is specified, S3 may be required to achieve a pass.

Hardness Requirements

Grade

UNS

Brinell Hardness HB

Vickers Hardness1HV

Rockwell Hardness HRB or C

Rockwell Superficial Hardness1, max

max

max

scale/max

30T scale

15T scale

30N scale

15N scale

TP304

S30400

192

208

B90

74

88

TP304L

S30403

192

208

B90

74

88

TP304N

S30451

192

208

B90

74

88

TP304LN

S30453

192

208

B90

74

88

TP316H

S31600

192

208

B90

74

88

TP316L

S31603

192

208

B90

74

88

TP316N

S31603

192

208

B90

74

88

TP316LN

S31653

192

208

B90

74

88

TP317

S31700

192

208

B90

74

88

TP321

S32100

192

208

B90

74

88

TP321H

S32109

192

208

B90

74

88

TP347

S34700

192

208

B90

74

88

TP348

S34800

192

208

B90

74

88

TPXM-10

S21900

269

285

C25

46

73

TPXM-11

S21903

269

285

C25

46

73

TPXM-15

S38100

192

200

B90

74

88

TPXM-19

S20910

269

285

C25

46

73

TPXM-29

S24000

256

270

B100

80

92

S31254

220

230

B96

79

91

S31725

220

230

B96

74

88

S31726

192

200

B90

74

88

S32600

192

200

B90

74

88

S24565

256

270

B100

74

88

S32654

250

263

B100

74

88

N08367

256

270

B100

74

88

N08904

192

200

B90

74

88

N08926

256

270

B100

74

88

Note

  1. Rockwell superficial hardness test or Vickers hardness test is permissible for wall thickness <0.065 in (1.65 mm).

    – Hardness testing is not required for tube with inside diameter ID <1/4 in (6.4 mm) or t<0.020 in (0.51 mm).

    Heat Treatment

    Grade

    UNS

    Temperature °F

    Temperature °C

    Treatment

    All

    All

    1900

    1040

    Minimum heat treatment temperature. Quench1,2

    S31254

    2100

    1150

    Minimum heat treatment temperature. Quench1

    S24565

    2050-2140

    1120-1170

    Heat treatment temperature range. Quench1

    S32654

    2100

    1150

    Minimum heat treatment temperature. Quench1

    N08367

    2025

    1107

    Minimum solution anneal temperature. Rapid Quench.

    N08904

    2000

    1100

    Minimum heat treatment temperature. Quench1

    N08926

    2010

    1100

    Minimum heat treatment temperature. Quench1

    Notes

    – All = All grades listed in the hardness requirements table other than those identified in this table. 1 Quench in water or rapid cool by other means

  2. For TP321, TP347 and TP348, solution annealing temperatures above 1950°F (1065°C) may impair resistance to intergranular corrosion when exposed to sensitising conditions. See supplementary requirement S3.

Chemical Composition

Composition Percentage, max or range

Grade

UNS

&DUERn

C

0DQJDQHVe

Mn

3KRVSKRUXs

P

6XOSKXUS

6LOLFRn

Si

1LFNHl Ni

&KURPLXm

Cr

0RO\EGHQXmMo

Note

TP304

S30400

0.08

2.00

0.040

0.030

0.75

8.00-11.0

18.0-20.0

TP304L

S30403

0.035

2.00

0.040

0.030

0.75

8.00-13.0

18.0-20.0

16

TP304LN

S30453

0.035

2.00

0.040

0.030

0.75

8.00-13.0

18.0-20.0

1,16

TP316

S31600

0.08

2.00

0.040

0.030

0.75

11.0-14.0

16.0-18.0

2.0-3.0

2

TP316L

S31603

0.035

2.00

0.040

0.030

0.75

10.0-15.0

16.0-18.0

2.0-3.0

16

TP316LN

S31653

0.035

2.00

0.040

0.030

0.75

10.0-15.0

16.0-18.0

2.0-3.0

1,16

TP317

S31700

0.08

2.00

0.040

0.030

0.75

11.0-14.0

18.0-20.0

3.0-4.0

TP321

S32100

0.08

2.00

0.040

0.030

0.75

9.00-13.0

17.0-20.0

3

TP347

S34700

0.08

2.00

0.040

0.030

0.75

9.00-13.0

17.0-20.0

4

TP348

S34800

0.08

2.00

0.040

0.030

0.75

9.00-13.0

17.0-20.0

4,5

TPXM-10

S21900

0.08

8.0-10.0

0.060

0.030

1.00

5.50-7.50

19.0-21.5

6

TPXM-11

S21903

0.04

8.0-10.0

0.060

0.030

1.00

5.50-7.50

19.0-21.5

6

TPXM-15

S38100

0.08

2.00

0.030

0.030

1.50-

2.50

17.5-18.5

17.0-19.0

TPXM-19

S20910

0.060

4.00-6.00

0.040

0.030

1.00

11.5-13.5

20.5-23.5

1.50-3.00

7

TPXM-29

S24000

0.080

11.50-

14.50

0.060

0.030

1.00

2.25-3.75

17.0-19.0

8

S31254

0.020

1.00

0.030

0.010

0.80

17.5-18.5

19.5-20.5

6.00-6.50

9

S30600

0.018

2.00

0.02

0.02

3.7-4.3

14.0-15.5

17.0-18.5

0.20

10

S31725

0.03

2.00

0.040

0.030

0.75

13.5-17.5

18.0-20.0

4.0-5.0

11,12

S31726

0.03

2.00

0.040

0.030

0.75

13.5-17.5

17.0-20.0

4.0-5.0

12,13

S24565

0.03

5.0-7.0

0.030

0.010

1.00

16.0-18.0

23.0-25.0

4.0-5.0

14

S32654

0.020

2.00-4.00

0.030

0.005

0.50

21.0-23.0

24.0-25.0

7.00-8.00

15

Notes

  • For Product Analysis, tolerances in ASTM A 480/A 480M apply (unless the Carbon content is specified as 0.04% or less). The A 480 tolerances are not included in this summary.

    – N08367, N08904 and N08926 are not included in the A 269 – 96 chemical requirements table.

    Composition Notes

    1 Nitrogen 0.10-0.16%

    2 For welded tube the nickel range is 10.0-14.0% 3 Titanium >5 x Carbon and 0.70% max

    4 Niobium + Tantalum >10 x Carbon and 1.00% max 5 Tantalum 0.10%

    6 Nitrogen 0.15-0.40%

    7 Niobium + Tantalum: 0.10-0.30%, Nitrogen 0.20-0.40%, Vanadium 0.10-0.30%

    8 Nitrogen 0.20-0.40%

    9 Nitrogen 0.18-0.22%, Copper 0.50-1.00%

    1. Copper 0.50% max

    2. Nitrogen 0.10 max, Copper 0.75% max

    3. For welded tube, Phosphorus 0.045% max 13 Nitrogen 0.10-0.20%, Copper 0.75% max

    14 Niobium + Tantalum: 0.1% max, Nitrogen 0.4-0.6%

    15 Nitrogen 0.45-0.55%, Copper 0.30-0.60%

    16 Carbon 0.040% max is necessary for tubes where many drawing passes are required, as with outside diameter <0.5 in (12.7mm) or nominal wall thickness <0.049 in (1.2 mm) (minimum wall thickness <0.044 in (1.12 mm))

    Note

  • Niobium is sometimes referred to as Columbium.

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