ASTM A815 Duplex Stainless Steel Piping Fittings

  • Type: Seamless and Welded Butt-welding Fittings
  • Size: NPS 1/8″ – 48″ WT: SCH5S, 10S, 40S, 80S
  • Standard: ANSI/ASME B16.9, MSS SP-43, MSS SP-97
  • 45° and 90° Elbows, 180° Bends, Caps, Tees, Reducers, Lap-joint Stub Ends, and other types

Features

ASTM A815/A815M Wrought Duplex Stainless Steel Piping Fittings

Chemical Composition (wt.%)
Grade UNS No. C Mn P S Si Ni Cr Mo N Cu Others
S31500 S31500 0.03 2.0 0.040 0.030 1.00 4.00-6.00 14.00-16.00 2.50-3.00 0.05-0.20
S31725 S31725 0.03 2.0 0.030 0.030 1.00 4.50-6.50 18.00-20.00 3.00-3.50 0.08-0.20
S31726 S31726 0.03 2.0 0.030 0.030 0.75 6.00-8.00 18.00-20.00 3.00-3.50 0.10-0.20
S31803 S31803 0.03 2.0 0.030 0.020 1.00 4.50-6.50 21.00-23.00 2.50-3.50 0.08-0.20
S32003 S32003 0.03 2.0 0.030 0.030 1.00 3.00-5.50 20.00-22.50 2.00-3.00 0.14-0.20
S32101 S32101 0.04 4.00-6.00 0.040 0.030 1.00 1.35-1.70 21.00-22.00 0.10-0.80 0.20-0.25 0.10-0.80 0.05-0.20 V
S32202 S32202 0.03 2.0 0.030 0.020 1.00 4.00-6.00 21.00-23.00 0.10-0.60 0.20-0.25 0.05-0.20 V
S32205 S32205 0.03 2.0 0.030 0.020 1.00 4.50-6.50 22.00-23.00 3.00-3.50 0.14-0.20
S32304 S32304 0.03 2.0 0.040 0.030 1.00 3.00-5.50 21.50-24.50 0.05-0.60 0.05-0.20 0.05-0.20 V
S39274 S39274 0.03 2.0 0.030 0.020 1.00 4.50-6.50 19.50-22.50 1.00-2.00 0.15-0.25 1.00-2.00 0.05-0.20 V
S32550 S32550 0.04 1.5 0.030 0.020 1.00 4.50-6.50 24.00-27.00 2.90-3.90 0.10-0.25 1.50-2.50
S32750 S32750 0.03 1.2 0.035 0.020 0.80 6.00-8.00 24.00-26.00 3.00-4.50 0.24-0.32 0.50-1.00 W
S32760 S32760 0.03 1.0 0.030 0.010 1.00 6.00-8.00 24.00-26.00 3.00-4.00 0.20-0.30 0.50-1.00
S39277 S39277 0.03 1.5 0.030 0.020 1.00 6.50-8.50 23.50-26.00 3.00-4.00 0.20-0.30 0.50-1.00 0.50-1.00 W
S32900 S32900 0.04 2.0 0.030 0.020 1.00 3.00-5.00 23.00-28.00 1.00-2.00 0.05-0.25 0.10-0.80 V
S32950 S32950 0.03 2.0 0.030 0.020 1.00 4.50-7.00 27.00-29.00 1.50-3.00 0.20-0.35 0.50-1.00 W

Table 2: Mechanical Property Requirements

Grade Tensile Strength, min, ksi [MPa] Yield Strength, min, ksi [MPa] Elongation in 2 in. or 50 mm, min, % Hardness, max, HBW
S31500 90 [620] 60 [415] 25 280
S31725 94 [650] 65 [450] 25 290
S31726 94 [650] 65 [450] 25 290
S31803 90 [620] 65 [450] 25 290
S32003 94 [650] 65 [450] 25 290
S32101 100 [690] 60 [415] 30 290
S32202 100 [690] 65 [450] 30 290
S32205 90 [620] 65 [450] 25 290
S32304 90 [620] 65 [450] 25 290
S39274 100 [690] 65 [450] 30 290
S32550 110 [758] 80 [550] 25 290
S32750 116 [800] 80 [550] 25 310
S32760 110 [758] 80 [550] 25 310
S39277 110 [758] 80 [550] 25 310
S32900 100 [690] 75 [515] 25 310
S32950 110 [758] 80 [550] 25 310

Technical Specifications

Specification Value
Material Standard ASTM A815/A815M Wrought Duplex Stainless Steel Piping Fittings
Material Grade S31500, S31725, S31726, S31803, S32003, S32101, S32202, S32205, S32304, S39274, S32550, S32750, S32760, S39277, S32900, S32950.
Seam Type Seamless and Welded
O.D. 10.3- 1219mm (NPS 1/8″ – 48″)
W.T. 1.65- 30.96mm (0.065″-1.219″) SCH 5S, SCH5, SCH10S, SCH10, SCH40S, SCH40, SCH80S, SCH80
Type of Fittings 45° LR and 90° SR/LR Elbows, 180° Returns, Caps, Equal or Reducing Tees, Concentric/Eccentric Reducers, Lap-joint Stub Ends
Manufacturing Process Butt-welded
Fitting Standard and Ends Finish ASME B16.9, MSS SP-43, and MSS SP-97.
Inspection Certificate EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection)
Tests Chemical Analysis, Tensile Test, UT/ET, Dimensional Inspection
Packing

Plain or beveled ends as per ANSI B16.25 to an angle of 30°+5°/-0°, end with plastic caps or metal protectors, covered or bare, bundled or loosely packed.

Application

Chemical Processing: To handle corrosive chemicals and high temperatures.
Petroleum Refining: In pipelines and process units due to their high strength and corrosion resistance.
Food and Beverage Processing: Ensuring sanitary and contamination-free transport of products.
Pharmaceutical Manufacturing: Maintaining hygienic conditions in processing systems.
Power Generation: Both conventional and nuclear plants for high-temperature and high-pressure applications.
Oil and Gas: Suitable for offshore and onshore environments with extreme conditions.
Water Treatment: In systems requiring corrosion-resistant materials.
Marine Applications: For shipbuilding and offshore platforms due to their resistance to seawater corrosion.
Pulp and Paper Industry: For processing equipment exposed to harsh chemicals.
Construction: Used in structural applications where durability and strength are essential.

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