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.
