Sandvik SAF 2304 lean duplex stainless steel Pipe manufacturer and suppliers

Sandvik SAF 2304 lean duplex stainless steel Pipe, Sandvik SAF 2707, Sandvik SAF 3207, Sandvik SAF 2507, Sandvik SAF 2205, Sanmac 2205, Sandvik SAF 2304, Sandvik 3RE60 duplex stainless steel seamless pipe

Dealer, exporter & suppliers of Sandvik SAF 2304 lean duplex stainless steel Pipe, ASTM A790 S32750 2507 SMLS Super Duplex Stainless Steel Pipe, ASTM A790 2205 Duplex Stainless Steel Pipes, Duplex Steel Seamless Pipes, ASTM A 789 / 790 ASME SA 789 / 790 duplex stainless steel seamless pipe

Sandvik SAF 2304 lean duplex stainless steel Pipe sizes & stock

PIPE TUBE TYPE NB SIZES SCH 5 SCH 10 SCH 40 SCH 80 SCH 160
Sandvik SAF 2304 lean duplex stainless steel Pipe
1/8"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
1/4"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
3/8"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
1/2"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
3/4"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
1"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
1 1/4"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
1 1/2"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
2"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
2 1/2"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
3"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
4"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
5"
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Sandvik SAF 2304 lean duplex stainless steel Pipe
6"
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Contents:

Sandvik Logo

Sandvik SAF 2304 lean duplex stainless steel Pipe

With the largest and most comprehensive pipe and tubing extrusion capability in the world, Ashtapad Overseas offers the widest variety of materials and sizes for all of your applications. Ashtapad serves the Power Generation market with transfer pipe, boiler tube, main steam pipe, hot re-heat pipe, flue gas desulphurization units and other products for nuclear, coal-fired, renewable and combined cycle applications & for the oil and gas industry, we offer Sandvik SAF 2304 lean duplex stainless steel Pipe, seamless and welded pipe and tubing for a variety of applications including OCTG and mechanical tubing, co-extruded clad line pipe, umbilical and control lines, and process piping.

The environment management system of the company is certified according to the requirements of ISO 9001:2008, 14001, 18001 & PED. Few of the major brands we represent are Arcelor Mittal, Sumitomo, Tenaris, Benteler, Jazeera Steel, Hyundai HYSCO, Arabian Pipes Company, Sandvik, Froch, etc. Our materials are approved by Saudi ARAMCO, SABIC, SHELL, ADNOC, GASCO, PDO, KNPC, KOC, QATAR Gas, SGC etc.

Ashtapad offers a wide range of Sandvik SAF 2304 lean duplex stainless steel Pipe, 316 Seamless Tubing316 Seamless Pipess 316l Seamless Pipe304 Seamless Tube304 Seamless Stainless Steel Tubing & Hydraulic Tube etc. We can meet most ASME, ASTM, AMS, and military specifications, and can cross-reference to most international standards, including full DIN 3.1b, full 3.1/3.2 Certifcation and NACE requirements.

Sandvik SAF 2304 lean duplex stainless steel Pipe Dimensional Range & Standard Specification

Sandvik SAF 2304 (Tube and pipe, seamless)

Datasheet updated 2015-02-16 10:39:33 (supersedes all previous editions)

Sandvik SAF 2304 is a lean duplex (austenitic-ferritic) stainless steel characterized by the following properties:

  • Very good resistance to stress corrosion cracking (SCC)
  • Good resistance to general corrosion and pitting
  • High strength – approximately twice the proof strength of austenitic stainless steels
  • Physical properties that offer design advantages
  • Ease of fabrication and good toughness
  • Good weldability

Standards

  • UNS S32304
  • EN number 1.4362
  • EN name X2CrNiN23-4
  • W.Nr. 1.4362
  • DIN X 2 CrNiN 23 4
  • SS 2327
  • AFNOR Z 2 CN 23.04AZ

Product standards
Seamless tube and pipe: ASTM A789; A790; EN 10216-5
Welded tube and pipe: ASTM A789; A790
Strip, sheet: 10088-2
Bar steel and forged billets: EN 10088-3

Approvals
Approved by the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section VIII, div. 1 construction.
ASME B31.3 Process Piping
VdTÜV-Werkstoffblatt 496
NGS 1607 (Nordic rules for applications) valid for SAF 2304 made by Sandvik.
Approved by DnV for general use on ships
Approved by RINA, registration No MAC/112/90

Chemical composition (nominal) %

C Si Mn P S Cr Ni Mo Cu N
≤0.030 ≤1.0 ≤2.0 ≤0.035 ≤0.015 22.5 4.5 0.3 0.3 0.1

Forms of supply

Seamless tube and pipe- finishes and dimensions

Seamless tube and pipe in Sandvik SAF 2304 is supplied in dimensions up to 260mm outside diameter. The delivery condition is solution annealed and either white pickled or bright annealed.

For hydraulic tubing applications SAF 2304 is also marketed under the name PW 400.

Other forms of supply:

  • Welded tube and pipe
  • Fittings
  • Wire electrodes and filler wire/pipe
  • Covered electrodes
  • Strip electrodes for surfacing
  • Strip, annealed or cold-rolled to different hardness
  • Bar steel
  • Plate, sheet and wide strip
  • Forged products
  • Cast products

Mechanical properties

The following figures apply to the material in the solution annealed condition. Tube and pipe with wall thickness above 20 mm (0.787 in.) may have slightly lower values. For seamless tubes with a wall thickness below 4 mm we guarantee proof strength (Rp0.2) values that are 50 MPa higher than those listed below at 20°C (68°F) as well as those listed at higher temperatures. More detailed information can be supplied on request.

At 20 °C (68°F)

Tube and pipe with a wall thickness max. 20 mm (0.79 in.)

Proof strength Tensile strength Elong. Hardness
Rp0.2a Rp1.0a Rm Ab A2″ HRC
MPa MPa MPa % %
Metric units
≥400c) ≥450 630-820c) ≥25 ≥25 ≤30
Proof strength Tensile strength Elong. Hardness
Rp0.2a Rp1.0a Rm Ab A2″ HRC
ksi ksi ksi % %
Imperial units
≥58c) ≥65 87-119c) ≥25 ≥25 ≤30

1 MPa = 1 N/mm2
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-section area.
c) For tubes with outside diameter max. 25.4 mm we guarantee 0.2% proof strength 450 MPa (65 ksi) and tensile strength min. 690 MPa (100 ksi) (ASTM A789).

At high temperatures

If Sandvik SAF 2304 is exposed to temperatures exceeding 280 °C (540 °F), for prolonged periods, the microstructure changes, which results in a reduction in impact strength. This does not necessarily affect the behavior of the material at the operating temperature. For example, heat exchanger tubes can be used at higher temperatures without any problems. Please contact Sandvik for more information.For pressure vessel applications, 280°C (540°F) is required as a maximum according to VdTÜV-Wb 496.

Temperature Proof strength Proof strength
Wt < 4 mm Wt > 4 mm
°C Rp0.2 Rp0.2
MPa MPa
min min
Metric units
50 420 370
100 380 330
150 360 310
200 340 290
250 330 280
300 310 270
Temperature Proof strength Proof strength
Wt < 0.16″ Wt > 0.16″
°F Rp0.2 Rp0.2
ksi ksi
min min
Imperial units
120 61.0 54.0
200 56.0 48.5
300 52.0 45.0
400 49.0 42.0
500 47.5 40.5
600 46.0 38.5

Physical properties

Density: 7.8 g/cm3, 0.28 lb/in3

Thermal conductivity

Temperature 20 100 200 300 400
°C W/(m °C)
Metric units
SAF 2304 16 17 18 19 21
AISI 316L 14 15 17 18 20
Temperature 68 200 400 600 800
°F Btu/(ft h °F)
Imperial units
SAF 2304 9 9.5 10.5 11.5 12.5
AISI 316L 8 8.5 9.5 10.5 11.5

Thermal expansion, mean values in temperature ranges (x10-6) SAF 2304 has a far lower coefficient of thermal expansion than austenitic stainless steels and therefore possesses certain design advantages.

Temperature 30-100 30-200 30-300 30-400
°C Per °C
Metric units
SAF 2304 13.5 14.0 14.5 14.5
Carbon steel 12.5 13.0 13.5 14.0
AISI 304L/316L 16.5 17.0 17.5 18.0
Temperature 86-200 86-400 86-600 86-800
°F Per °F
Imperial units
SAF 2304 7.5 8.0 8.0 8.0
Carbon steel 7.0 7.0 7.5 8.0
AISI 304L/316L 9.5 9.5 10 10

Corrosion resistance

General corrosion

Due to the high chromium content and its well-balanced composition Sandvik SAF 2304 possesses excellent corrosion resistance in acidic environments. The table below gives the corrosion rate in different acids and Figures 4-6 show isocorrosion diagrams for Sandvik SAF 2304 in sulphuric, formic and nitric acid, respectively.

Corrosion rates in acid-water mixtures, mm/year (mpy). Activated specimens, 1+3+3 days, average of the last two periods for two specimens.

Conc.
Temperature Sandvik
Weight-% °C (°F) SAF 2304 AISI 304L AISI 316L
Acetic acid CH3COOH
20
B 0.01 (0.4) 0.01 (0.4)
50
B 0 0.04 (1.6) 0
70
B 0
90
B 0.01 (0.4)
Formic acid, HCOOH
5
60 (140) 0
10
B 0.04 (1.6) 0.80 (32) 0.19 (7.6)
30
60 (140) 0
30
90 (194) 0
80
90 (194) 0 0.50 (20)
90
60 (140) 0
Hydrochloric acid, HCI
0.5
40 (104) 0 0
1
40 (104) 0.30 (12) 0.70 (28)
Nitric acid, HNO3 (5×2 days)
65
B 0.16 (6.4) 0.16 (6.4) 0.30 (12)
Phosphoric acid, H3PO4
30
B 0.10 (4) 0.20 (8) 0.07 (2.8)
50
100 (212) 0.04 (1.6) 0.09 (3.6) 0.21 (8.4)
60
90 (194) 0.01 (0.4) 0.2 (0.8) 0.02 (0.8)
80
80 (176) 0.01 (0.4) 0.01(0.4) 0.06 (2.4)
Sulphuric acid, H2SO4
5
60 (140) 0
5
90 (194) 0.06 (2.4) 3.6 (144)
10
60 (140) 0.10 (4) 0.66 (26.4)
10
70 (158) 0.14 (5.6) 1.7 (68)
10
80 (176) 0.20 (8) 7.9 (316)
15
50 (122) 0.17 (6.8) 0.47 (18.8)
20
30 (86) 0.20 (8) 0.02 (0.8)

B = Boiling

The minimum PRE numbers for Sandvik SAF 2304 and the austenitic standard stainless steels AISI 316L and AISI 304L are given in the following table.

Alloy % Cr % Mo % N PRE
Sandvik SAF 2304 23 0.1 24
AISI 316L 17 2.2 24
AISI 304L 18.4 18

Heat treatment

The tubes are normally delivered in heat treated condition. If additional heat treatment is needed due to further processing the following is recommended.

Solution annealing

930 -1050°C (1710 -1920°F), rapid cooling in air or water.

Welding

The weldability of Sandvik SAF 2304 is good. Suitable welding methods are manual metal-arc welding with covered electrodes or gas shielded arc welding.

Welding should be undertaken within the heat input range 0.5-2.5 kJ/mm, using an interpass temperature of maximum 250°C (482oF). Preheating or post-weld heat treatment is normally not necessary.

Filler metals of austenitic-ferritic type shall be used in order to obtain a weld metal with corrosion resistance and mechanical properties close to the parent metal. For gas shielded arc welding, Sandvik 23.7.L, Sandvik 22.8.3.L or Sandvik 22.8.3.LSi are recommended, and for manual metal-arc welding the covered electrode Sandvik 22.9.3.LR. These filler metals can also be used for welding Sandvik SAF 2304 to carbon steels and stainless steels. The covered electrode Sandvik 23.12.2.LR and the wire electrode Sandvik 24.13.L can also be used for this purpose. When welding components for use in high concentrated nitric acid the Sandvik can advice on the choice of filler metal.

Fabrication

Bending

The starting force needed for bending is slightly higher for Sandvik SAF 2304 than for ASTM 304/316. Sandvik SAF 2304 can be cold bent to 25% deformation without requiring subsequent heat treatment. Under service conditions where the risk of stress corrosion cracking starts to increase, for example where the material temperature is nearly 125°C (255°F) in a neutral oxygen-bearing environment with around 100 ppm Cl- , heat treatment is recommended even after moderate cold bending. For pressure vessel applications in Germany and the Nordic countries heat treatment may be required after cold deformation in accordance with VdTÜV-Wb 496 and NGS 1607. Heat treatment is carried out in the form of solution annealing (see under Heat treatment) or resistance annealing. Hot bending is carried out at 1100-950°C (2010-1740°F) and should be followed by solution annealing.

Expanding

In comparison with austenitic stainless steels, Sandvik SAF 2304 has a higher proof strength. This must be borne in mind when expanding tubes into tube-sheets. Normal expanding methods can be used, but the expansion requires higher initial force and should be undertaken in one operation.

Contact us for detailed recommendations on expanding duplex stainless steels.

Machining

Being a two-phase material (austenitic-ferritic) Sandvik SAF 2304 will present a different tool wear profile from that of single-phase steels of type ASTM 304L. The cutting speed must, therefore, be slightly lower than that recommended for ASTM 304L and as a first recommendation 25 % lower cutting speeds should be used compared to the speed for machining Sanmac 304/304L. It is, however, recommended that a tougher insert grade is used for semi-roughing operations, Sanmac 304/304L.

Applications

Sandvik SAF 2304 possesses good mechanical and physical properties, excellent resistance to stress corrosion cracking and other forms of corrosion as well as good weldability. These properties make it both a technically and economically superior alternative to stainless steels such as the austenitic steels AISI 304, 304L, 316, 316L, 321 and 347, the ferritic chromium steels AISI 430 and 444 and the martensitic chromium steels of the AISI 410 and 420 type. Sandvik SAF 2304 also has advantages over low-alloy steels. Examples where Sandvik SAF 2304 offers advantages over other materials are given in the following table.

The good mechanical and corrosion properties make Sandvik SAF 2304 an economical choice in many applications by reducing the life cycle cost of equipment.

Industry
Applications
Used today
Advantages
of Sandvik SAF 2304
Process
industry
Heat exchangers and piping where chlorides are present
AISI 304/304L
AISI 316/316L
Higher resistance to SCC
Instrumentation tubing, steam tracing
AISI 304/304L
AISI 316/316L
Higher resistance to SCC
Petrochemical industry
Tubular reactors for high temperatures where carbon steel is used for the shell
AISI 304/304L
AISI 316/316L
Coefficient of thermal expansion comparable to that of carbon steel
Pulp & paper
Digester preheater
Evaporators
AISI 304/304L
AISI 316/316L
Higher resistance to SCC
Higher resistance to SCC
Nuclear power
Reheaters
Carbon steels
AISI 430
AISI 304/304L
Ease of fabrication, good corrosion resistance
Power
Feed water heaters
AISI 430
AISI 304/304L
High resistance to SCC, high strength and ease of fabrication
Engineering
Beams and torque transmitting shafts
Carbon steels
AISI 304/304L
AISI 316/316L
High strength combined with excellent corrosion resistance, ease of fabrication and low cost
Hydraulic system
Hydraulic tubing
Carbon steels
Excellent resistance to corrosion
Reduced installation cost owing to easy cleaning
Oil and gas
Coolers on- and offshore. Piping systems and flow lines on- and offshore
Carbon steels
AISI 304/304L
AISI 316/316L
AISI 420
Optimal combination of strength weldability, corrosion resistance and cost
Tensioning systems on offshore rigs. Instrumentation tubing
AISI 304/304L
AISI 316/316L
Carbon steels
High strength combined with high corrosion resistance

SOURCE: www.smt.sandvik.com

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Useful Information:

SAF 2205® is a registered trademark for Sandvik

Alloys UNS Designation ASTM Specification Tensile Strength (min.) Yield Strength 0.2% Offset (min.)
MPa ksi Mpa
304 S30400 A213, A269, A312, A632 515 75 205
304L S30403 A213, A269, A312, A632 485 70 170
304H S30409 A213, A269, A312, A632 515 75 205
310S S31000 A213, A269, A312, A632 515 75 205
316 S31600 A213, A269, A312, A632 515 75 205
316L S31603 A213, A269, A312, A632 485 70 170
316H S31609 A213, A269, A312, A632 515 75 205
317 S31700 A213, A269, A312, A632 515 75 205
317L S31703 A213, A269, A312, A632 485 70 170
321 S32100 A213, A269, A312, A632 515 75 205
347 S34700 A213, A269, A312, A632 515 75 205
Duplex 2205 S31808 A789 620 90 450
400 N04400 B165 480 70 195
600 N06600 B163 550 80 240
625 GR 1 (Annealed) N06625 B444 827 120 414
625 GR 2 (Solution Annealed) N06625 B444 827 120 276
800 N08800 B163 520 75 205
825 N08825 B423 586 85 240

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South East Asia and Pacific:Japan, South Korea, Singapore, Thailand, Indonesia, Australia

Other brand manufacturers

stainless steel pipe manufacturers

  • Sumitomo Sandvik SAF 2304 lean duplex stainless steel Pipe | Sumitomo Metals, Japan
  • Nippon Sandvik SAF 2304 lean duplex stainless steel Pipe | Nippon Steel Corporation, Japan
  • Kobe Sandvik SAF 2304 lean duplex stainless steel Pipe | Kobe Special Tube, Japan
  • Sanyo Sandvik SAF 2304 lean duplex stainless steel Pipe | Sanyo Special Steel, Japan
  • Tubacex Sandvik SAF 2304 lean duplex stainless steel Pipe | Tubacex Tubos Inoxidables S.A., Spain
  • Schoeller Sandvik SAF 2304 lean duplex stainless steel Pipe | Schoeller Bleckmann, Austria
  • Seah Sandvik SAF 2304 lean duplex stainless steel Pipe | Seah Steel Corporation, Korea
  • Special Metals alloys Sandvik SAF 2304 lean duplex stainless steel Pipe | Special Metals alloys, USA
  • Sandvik Sandvik SAF 2304 lean duplex stainless steel Pipe | Sandvik, Sweden

 

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Tel: +91-22-23841700, 67437666, 66595333
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