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Standard and Technical Data
Seamless Pipe Production Process
ASME B36.10M & B36.19M Steel Pipe Dimensions Chart (Size Chart)
ASTMA312 Steel Pipes Chemical Composition
ASTM B444 Standard Specification for Nickel Chromium Molybdenum Alloys UNSN06625 and UNSN06852 and Nickel Chromium Molybdenum Silicon Alloy UNS N06219 Pipe and Tube
ASTM B983-Standard Specification for Precipitation Hardened or Cold Worked Seamless Nickel Alloy Pipe and Tube
ASTM B446 Standard Specification for Nickel Chromium Molybdenum Columbium Alloy UNS N06625 Rod and Bar
ASTM B166 Standard Specification for Nickel-Chromium-Iron Alloys UNS N06600 N06601 N06603 N06690 N06693 N06025 N06045 and N06696 and Nickel Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Rod,Bar, and Wire
ASTM B407Standard Specification for Nickel-Iron-Chromium Alloy Seamless Pipe and Tube
ASTM B161 Standard Specification for Nickel Seamless Pipe and Tube
ASTM B423 Standard Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy UNS N08825, N08221, and N06845 Seamless Pipe and Tube
ASTM B163 Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat Exchanger Tube
ASTM B829-Standard Specification for General Requirements for Nickel and Nickel Alloys Seamless Pipe and Tube
ASTM B622 Standard Specification for Seamless Nickel and Nickel Cobalt Alloy Pipe and Tube
ASTM B167 Standard Specification for Nickel-Chromium-Iron Alloys UNS N06600, N06601, N06603,N06690, N06693, N06025, N06045, and N06696 UNS N06617 and Nickel-Iron-Chromium-Tungsten Alloy UNS N06674 Seamless Pipe and Tube
ASTM B423-Standard Specification for Nickel-Iron-Chromium-Molybdenum-Coppe Alloy UNS N08825, N08221, and N06845 Seamless Pipe and Tube
ASTMB165 Standard Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube
ASME SA213A213 Seamless Austenitic Alloy Steel Boiler Super heater and Stainless Steel Heat Exchanger Tubes
ASTMA312 Seamless Welded and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTMA 249A 249M Specification for Welded Austenitic Steel Boiler, Superheater,Heat-Exchanger, and Condenser tubes
ASTMA269 Seamless and Welded Austenitic Stainless Steel Tubing
ASTM A270 Seamless and Welded Austenitic and Ferritic and Austenitic Stainless Steel Sanitary Tubing
ASTMA999 Standard Specification for General Requirements for Alloy and Stainless Steel Pipe
ASTMA1016 Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
ASME SA213A213
ASTM A270
ASTM A789
ASTMA 249A 249M
ASTMA312
ASTMA790
Difference between ASTM A249, A269, A270, and A554 Stainless steel tubing
Introduction:

Called Duplex Pipe because of its mixed microstructure with about equal proportions of ferrite and austenite, duplex stainless steels are a family of grades, which range in corrosion performance depending on their alloy content. The chemical composition based on high contents of Cr and Mo, improves intergranular and pitting corrosion resistance, respectively. Additions of nitrogen can promote structural hardening by interstitial solid solution mechanism, which raises the yield strength and ultimate strength values without impairing toughness. Moreover, the two-phase microstructure guarantees higher resistance to pitting and stress corrosion cracking in comparison with conventional stainless steels.

Duplex is a stainless steel made from a mixture of austenite and ferrite phases. Like most austenitic stainless steels, duplex has a strong resistance to corrosion, similar to those of a Type 304 and 316.

Unlike similar steels, duplex also displays an improved resistance to localized corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. And because duplex has a lower nickel and molybdenum content than other austenitic stainless steels, it can prove a more cost effective option due to a lower alloying content.

Due to its Ferritic qualities, duplex steel also shows very good resistance to stress corrosion cracking when compared to standard austenitic.  In some cases, the strength of duplex steel can be up to double that of the most commonly used grades of stainless steel.

Duplex becomes brittle at extreme temperatures so its use is normally restricted to a maximum temperature of 300 degrees. Duplex also shows signs of embrittlement at –50 degrees.


Benefits:

Stronger than 300 series stainless steel which also brings weight advantages.

Cheaper than some stainless steels.

High resistance to pitting, crevice corrosion and stress corrosion cracking.

Higher heat conductivity and lower thermal expansion than austenitic steels.


Uses:

Pipes for production and transportation of oil and gas

Structural and mechanical components

Heat exchangers

Cooling pipes

Cargo vessels and containers

High strength wiring


Standard of ASTMA790
1. Scope*

1.1 This specification2 covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

1.2 Optional supplementary requirements are provided for pipe when a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be specified in the order.

1.3 Appendix X1 of this specification lists the dimensions of welded and seamless stainless steel pipe as shown in ANSIB36.19. Pipe having other dimensions may be furnished

provided such pipe complies with all other requirements of this specification.

1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the M designation of this specification is specified in the order.


2. Referenced Documents

2.1 ASTM Standards: 3

A 370 Test Methods and Definitions for Mechanical Testing of Steel Products

A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys and Feroalloys

A 999/A 999M Specification for General Requirements for Alloy and Stainless Steel Pipe

E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing

E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation

E 381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

E 426 Practice for Electromagnetic (Eddy-Current) Examination of Seamless and Welded Tubular Products, Austenitic Stainless Steel and Similar Alloys

E 527 Practice for Numbering Metals and Alloys (UNS)

2.2 ANSI Standards:4

B1.20.1 Pipe Threads, General Purpose

B36.10 Welded and Seamless Wrought Steel Pipe

B36.19 Stainless Steel Pipe

2.3 SAE Standard:5

SAE J 1086

2.4 Other Standard:6

SNT-TC-1A Personal Qualification and Certification in Nondestructive Testing


3. Ordering Information

4.1 Orders for material under this specification should include the following, as required, to describe the desired material adequately:

4.1.1 Quantity (feet, metres, or number of lengths),

4.1.2 Name of material (ferritic/austenitic steel pipe),

4.1.3 Process (seamless or welded),

4.1.4 Grade (see Table 1),

4.1.5 Size (NPS designator or outside diameter and schedule number of average wall thickness),

4.1.6 Length (specific or random) (see Section 11),

4.1.7 End finish (section on ends of Specification A 999/A 999M),

4.1.8 Optional requirements (product analysis, Section 9;hydrostatic test or nondestructive electric test, Section 14),

4.1.9 Test report required (section on certification of SpecificationA 999/A 999M),

4.1.10 Specification designation, and

4.1.11 Special requirements and any supplementary requirementsselected.


4. General Requirements

Material furnished under this specification shall conform to the applicable requirements of the current edition of Specification A 999/A 999M unless otherwise provided herein


Tensile and Hardness Requirements A

UNS Designation


Tensile Strength,
min, ksi[MPa]



Yield Strength,
min, ksi [MPa]


Elongation in 2 in. or 50 mm,min, %

Hardness, max

Brinell

 HRC

S31803

 90 [620]

65 [450]

25

290

30

S32205

 95 [655]

70 [485]

25

290

30

S31500

 92 [630]

64 [440]

30

290

30

S32550

 110 [760]

 80 [550]

15

297

31

S31200

100 [690]

 65 [450]

25

280

-

S31260B

 100 [690]

65 [450]

25

290

30

S32001

 90 [620]

65 [450]

25

290

30

       S32304

OD 1 in. [25 mm] and Under

100 [690]

65 [450]

25

-

-

OD over 1 in. [25 mm]

87 [600]

58 [400]

25

290

30

S39274

116 [800]

 80 [550]

15

310

-

S32750

116 [800]

 80 [550]

15

300

32

S32760

109 [750]

 80 [550]

25

300

-

S32900

90 [620]

70 [485]

20

271

28

S32950C

100 [690]

 70 [480]

20

290

30

S39277

120 [825]

 90 [620]

25

290

30

S32520

112 [770]

80 [550]

25

310

-

       S32906

Wall below 0.40 in.(10 mm)

116 [800]

 94 [650]

25

300

32

Wall 0.40 in. (10 mm) and above

109 [750]

80 [550]

25

300

32

S32003

90 [620]

65 [450]

25

290

30

A For tubing smaller than 1⁄2 in. [12.7 mm] in outside diameter, the elongation values given for strip specimens in Table 4 shall apply. Mechanical property

requirements do not apply to tubing smaller than 1⁄8 in. [3.2 mm] in outside diameter or with walls thinner than 0.015 in. [0.4 mm].

B Prior to A 789/A 789M–87, the values for S31260 were: 92 ksi tensile strength, 54 ksi yield strength, and 30 % elongation.

C Prior to A 789/A 789M–89, the tensile strength value was 90 ksi for UNS S32950.


Chemical Requirements


UNS
Designation A


C

 Mn

 P

S

Si

 Ni

Cr

Mo

 N

 Cu

 Others

S31803

0.030 max

2.00 max

0.030 max

0.020 max

1.00 max

4.5–6.5

21.0–23.0

 2.5–3.5

0.08–0.20

-

-

S32205

0.030 max

2.00 max

0.030 max

0.020 max

1.00 max

4.5–6.5

22.0–23.0

3.0–3.5

0.14–0.20

-

-

S31500

0.030 max

1.20–2.00

0.030 max

0.030 max

1.40–2.00

4.3–5.2

18.0–19.0

2.50–3.00

0.05–0.1

-

-

S32550

0.04 max

1.50 max

0.040 max

0.030 max

1.00 max

4.5–6.5

24.0–27.0

2.9–3.9

0.10–0.25

1.50–2.50

-

S31200

0.030 max

2.00 max

 0.045 max

0.030 max

1.00 max

5.5–6.5

24.0–26.0

1.20–2.00

0.14–0.20

-

-

S31260

0.030 max

1.00 max

0.030 max

0.030 max

0.75 max

5.5–7.5

24.0–26.0

2.5–3.5

0.10–0.30

0.20–0.80

W 0.10–0.50

S32001

0.030 max

4.00–6.00

0.040 max

0.030 max

 1.00 max

1.0–3.0

19.5–21.5

0.60 max

0.05–0.17

1.00 max

-

S32304

0.030 max

2.50 max

0.040 max

0.040 max

1.00 max

3.0–5.5

21.5–24.5

 0.05–0.60

0.05–0.20

0.05–0.60

-

S39274

0.030 max

 1.00 max

0.030 max

0.020 max

0.80 max

6.0–8.0

24.0–26.0

2.5–3.5

0.24–0.32

0.20–0.80

W 1.50–2.50

S32750

0.030 max

1.20 max

0.035 max

0.020 max

0.80 max

6.0–8.0

24.0–26.0

3.0–5.0

 0.24–0.32

0.50 max

-

S32760

0.05 max

1.00 max

0.030 max

0.010 max

1.00 max

6.0–8.0

24.0–26.0

3.0–4.0

0.20–0.30

 0.50–1.00


W 0.50–1.00
40 minB


S32900

0.08 max

1.00 max

0.040 max

0.030 max

0.75 max

2.5–5.0

23.0–28.0

1.00–2.00

-

-

-

S32950

0.030 max

2.00 max

0.035 max

0.010 max

0.60 max

3.5–5.2

26.0–29.0

1.00–2.50

 0.15–0.35

-

-

S39277

0.025 max

0.80 max

0.025 max

0.002 max

0.80 max

6.5–8.0

24.0–26.0

3.00–4.00

0.23–0.33

1.20–2.00

W 0.80–1.21

S32520

0.030 max

1.50 max

0.035 max

0.020 max

0.80 max

5.5–8.0

23.0–25.0

 3.–5.

0.20–0.35

0.50–3.00

-

S32906

0.030 max


1.50 max
0.80 min


0.030 max

0.030 max

0.50 max


7.5 max
5.8 min



30.0 max
28.0 min



2.60 max
1.50 min



0.40
.30



0.80
-



-
-


S32003

0.030 max

2.00 max

0.030 max

 0.020 max

1.00 max

3.0-4.0

19.5-22.5

1.50-2.00

0.14-0.20

-

-

A New designation established in accordance with Practice E 527 and SAE J1086.

B % Cr + 3.3 3 %Mo + 16 3 % N.