ASTM A 409/A 409M – 95a: Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service

ASTM A 409/A 409M – 95a

Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service

This specification covers straight seam or spiral seam electric-fusion-welded, light-wall, austenitic steel pipe intended for corrosive or high temperature service. Sizes covered are NPS 14 to NPS 30 with extra light (Schedule 5S) and light (Schedule 10S) wall thickness. Pipe having other dimensions may be specified.

Dimensions and Tolerances

  • Dimensions. Pipe sizes normally furnished are NPS 14 to NPS 30 with extra light (Schedule 5S) and light (Schedule 10S) wall thickness.

  • Minimum Wall Thickness. At any point this must not be more than 0.018 in (0.46 mm) under the specified wall thickness.

  • Outside Diameter. For wall thicknesses <0.188 in (4.8 mm) OD tolerance is ±20%. For wall thicknesses >0.188 in (4.8 mm) OD tolerance is ±40%.

  • Out-of-Roundness. The difference between maximum and minimum OD must be <1.5% of the specified OD.

  • Straightness. Deviation from 10 ft (3 m) straight edge is < 3/16 in (4.8 mm).

  • Cut Lengths. Unless otherwise specified, pipes <NPS 22 are furnished in random lengths of 9 to 12 ft. Pipes >NPS 22 are not less than 5 ft. Circumferential welding of two or more lengths may be specified.

    Manufacture

  • Materials. Refer to chemical composition table.

  • Welding. Manual or automatic electro-welding process. Weld surface to be flush with base plate or may have <1/16 in (2 mm) crown. Weld reinforcement removal is optional. Weld filler metal conforms to applicable AWS specification for the grade. Filler metal specifications in A 409 are not included in this summary.

  • Heat Treatment. Refer to heat treatment table and optional and supplementary requirements. No final heat treatment may be specified if the plate has already been heat treated as required.

  • Marking on each length of pipe. Manufacturers name or trade mark, specification number, grade, manufacturer’s heat number, size, schedule number. Also, final heat treatment: ‘HT-O’ if none, or ‘HT-temp’ where ‘temp’ is final heat temperature (if under 1900

    °F [1040 °C]), ‘HT-SO’ if no heat treatment of plate.

    Finish and Repair

  • Appearance. The pipe shall have a workmanlike finish.

  • Defect Removal by Machining or Grinding. Defects may be repaired by machining or grinding, provided the wall thickness is not reduced below the minimum.

  • Defect Repair by Welding. Defects which violate minimum wall thickness can be repaired by welding if the purchaser agrees. Unless otherwise specified, heat treatment or retreatment must follow repair. If the repair depth is >1/4 wall thickness pressure and nondestructive testing or retesting is required.

  • Finish. Pipe will be free of scale and contaminating iron particles. Bright annealed pipe need not be pickled, blasted or have other surface finishing. The purchaser may request a passivating treatment.

    Ordering Information

    Item

    Notes

    Specification number

    ASTM A 409/A 409M-95a

    Size

    Nominal pipe size or outside diameter. Schedule or average wall thickness.

    Quantity

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

    Name of material

    Straight seam or spiral seam electro-fusion welded austenitic stainless steel pipe

    Grade

    Selected from chemical composition table

    End finish

    Plain ends with all burrs removed is ASTM requirement. Bevelled, or other end finishes can be specified.

    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 S6

    Note

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

    Mandatory Testing

  • Transverse Tension Test. One test made to represent each lot. A lot is pipe of the same grade, welded to the same procedure and with a common heat treatment. The maximum lot size is 200 ft (60 m) of pipe with same NPS and wall thickness.

  • Transverse Guided-Bend Weld Test. One test, two specimens will be tested for each lot. One specimen is subject to a face guided- bend test and the other to a root guided-bend test. Cracks <1/8 in (3 mm) are acceptable.

  • Hydrostatic Test or Nondestructive Test. Each pipe is subject to a pressure test or nondestructive testing of all welds. Air or gas pressure testing may be used with internal pressure of 100 psi (700 kPa) and using soap solution on welds to detect leakage.

    Optional and Supplementary Requirements

  • Type of melting may be specified.

  • Nondestructive testing of welds is subject to purchaser agreement.

  • Weld bead may be removed at manufacturers option or as agreed with purchaser.

  • Weld filler metal. Purchaser may request higheralloy filler metal when needed for corrosion resistance.

  • Special heat treatment, or no final heat treatment, may be requested. Controlled structural or special service characteristics may be specified as a guide to the most suitable heat treatment. Refer to S5 also.

  • Passivating treatment may be specified.

  • Repair by welding is subject to purchaser agreement.

  • Surface finishing may be specified

  • Certification details may be requested.

  • S1 Product Analysis. Analysis for each finished sheet or plate from each heat. Conformance with the chemical composition table is required.

  • S1 Radiographic Examination. Weld soundness will be examined as agreed with purchaser.

  • S1 Corrosion Requirements. Boiling Nitric Acid or Acidified Copper Sulphate test may be specified for finished grade. Details in A 409 are not repeated in this summary.

  • S1 Ferrite Control in Weld Deposits. Ferrite content of deposited weld metal may be determined as agreed between purchaser and vendor.

  • S1 Stabilising Heat Treatment. Grades TP321, TP347 and TP348 can be given stabilisation heat treatment at a temperature lower than used for solution annealing heat treatment. Temperature to be agreed between purchaser and vendor.

  • S1 Intergranular Corrosion Test. Performed in accordance with Practice A262, Practice E. S5 may be necessary for TP321, TP347 and TP348.

    Tensile Requirements

    Grade

    UNS

    Tensile Strength min

    Yield Strength min

    ksi

    MPa

    ksi

    MPa

    TP304

    S30400

    75

    515

    30

    205

    TP304L

    S30403

    70

    485

    25

    170

    TP309Cb

    S30940

    75

    515

    30

    205

    TP309S

    S30908

    75

    515

    30

    205

    TP310Cb

    S31040

    75

    515

    30

    205

    TP310S

    S31008

    75

    515

    30

    205

    TP316

    S31600

    75

    515

    30

    205

    TP316L

    S31603

    70

    485

    25

    170

    TP317

    S31700

    75

    515

    30

    205

    TP321

    S32100

    75

    515

    30

    205

    TP347

    S34700

    75

    515

    30

    205

    TP348

    S34800

    75

    515

    30

    205

    S31254

    94

    650

    44

    300

    S30815

    87

    600

    45

    310

    S31725

    75

    515

    30

    205

    S31726

    80

    550

    35

    240

    S24565

    115

    795

    60

    415

    N08367

    100(951)

    690(6551)

    45

    310

    Note

    1. Value if wall thickness >0.187 in (4.75 mm)

      Heat Treatment

      Grade

      UNS

      Temperature °F

      Temperature °C

      Treatment

      All

      All

      1900

      1040

      Minimum heat treating temperature. Quench1,2

      S31254

      2100

      1150

      Minimum heat treating temperature. Quench1

      S30815

      1920

      1050

      Minimum heat treating temperature. Quench1

      S24565

      2050-2140

      1120-1170

      Minimum heat treating temperature. Quench1

      N08367

      2025

      1107

      Minimum heat treating temperature. Quench1

      Notes

      • All = All grades listed in the chemical composition table except those itemised in this table. 1 Quench in water or rapid cool by other means.

    2. For grades TP321, TP347 and TP348, if solution temperatures above 1950 °F (1065 °C) are used, lower temperature final stabilisation treatment may be specified (see Supplementary Requirement S5) to ensure intergranular corrosion resistance is not impaired.

Chemical Composition

Composition Percentage, max or range

Grade

UNS

&DUERn

C

0DQJDQHVe

Mn

3KRVSKRUXs

P

6XOSKXr

S

6LOLFRn

Si

1LFNHl Ni

&KURPLXm

Cr

0RO\EGHQXm Mo

Note

TP304

S30400

0.08

2.00

0.045

0.030

0.75

8.00-11.0

18.0-20.0

TP304L

S30403

0.035

2.00

0.045

0.030

0.75

8.00-13.0

18.0-20.0

TP309Cb

S30940

0.08

2.00

0.045

0.030

0.75

12.0-16.0

22.0-24.0

0.75

1, 2

TP309S

S30908

0.08

2.00

0.045

0.030

0.75

12.0-15.0

22-24

0.75

2

TP310Cb

S31040

0.08

2.00

0.045

0.030

0.75

19.0-22.0

24.0-26.0

0.75

1, 2

TP310S

S31008

0.08

2.00

0.045

0.030

0.75

19.0-22.0

24.0-26.0

0.75

2

TP316

S31600

0.08

2.00

0.045

0.030

0.75

10.0-14.0

16.0-18.0

2.0-3.0

TP316L

S31603

0.035

2.00

0.045

0.030

0.75

10.0-15.0

16.0-18.0

2.0-3.0

TP317

S31700

0.08

2.00

0.045

0.030

0.75

11.0-14.0

18.0-20.0

3.0-4.0

TP321

S32100

0.08

2.00

0.045

0.030

0.75

9.00-13.0

17.0-20.0

3

TP347

S34700

0.08

2.00

0.045

0.030

0.75

9.00-13.0

17.0-20.0

4

TP348

S34800

0.08

2.00

0.045

0.030

0.75

9.00-13.0

17.0-20.0

5

S31254

0.020

1.00

0.030

0.010

0.80

17.5-18.5

19.5-20.5

6.00-6.50

11

S30815

0.05-

0.10

0.80

0.040

0.030

1.40-

2.00

10.0-12.0

20.0-22.0

6, 7

S31725

0.03

2.00

0.045

0.030

0.75

13.5-17.5

18.0-20.0

4.0-5.0

2, 8

S31726

0.03

2.00

0.045

0.030

0.75

13.5-17.5

17.0-20.0

4.0-5.0

9

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

10

N08367

0.030

2.00

0.040

0.030

1.00

23.50-

25.50

20.00-

22.00

6.00-7.00

12

Composition Notes

1 Niobium + Tantalum: 10 x Carbon min, 1.10% max 2 Copper 0.75% max

  1. Titanium < 5 x Carbon, 0.7% max

  2. Niobium + Tantalum < 10 x Carbon and 1.00% max

  3. Niobium + Tantalum < 10 x Carbon and 1.00% max, Tantalum 0.10% max 6 Cerium 0.03-0.08%

7 Nitrogen 0.14-0.20%

  1. Nitrogen 0.10% max

  2. Nitrogen 0.10-0.20%, Copper 0.75% max

  3. Nitrogen 0.4-0.6%, Niobium 0.1% max

11 Nitrogen 0.180-0.220%, Copper 0.50-1.00%

12 Copper 0.75% max, Nickel 0.18-0.25%

Note

  • Niobium is sometimes referred to as Columbium.

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