ASTM A815 S32750 Tee Manufacturer | Duplex Tee Fittings Supplier
As a reliable ASTM A815 S32750 Tee manufacturer, We specialize in the production and supply of high-strength duplex stainless steel tee fittings made from UNS S32750 (also known as SAF 2507). Our products are widely used in offshore platforms, chemical processing, desalination plants, and other highly corrosive environments.
What is ASTM A815 S32750 Tee?
The ASTM A815 S32750 Tee is a buttweld pipe fitting made from super duplex stainless steel UNS S32750. It is used to distribute or combine fluid flow in a piping system and offers excellent resistance to chloride stress corrosion cracking, pitting, and crevice corrosion.
ASTM A815 S32750 refers to wrought super duplex stainless steel pipe fittings, produced in accordance with the ASTM A815/A815M standard. These fittings are typically used in high-pressure, highly corrosive environments such as offshore oil and gas, desalination, petrochemical, and marine applications.
S32750 offers superior resistance to chloride stress corrosion cracking, pitting (PREN > 40), and crevice corrosion. Its high mechanical strength allows for lighter, thinner-walled piping systems.
ASTM A815 S32750 Tee Specification
- ✔ Standard: ASTM A815 / ASME SA815
- ✔ Material Grade: S32750 / UNS S32750 / 1.4410 / SAF 2507
- ✔ Fitting Type: ASTM A815 S32750 Equal Tee / ASTM A815 S32750 Reducing Tee / Barred Tee
- ✔ Connection: Butt Weld (BW)
- ✔ Size Range: ½” to 24” (DN15 to DN600)
- ✔ Wall Thickness: SCH10 to SCH160 / XXS
- ✔ Manufacturing Method: cold forming + heat treatment
- ✔ Heat Treatment: Solution annealed per ASTM A815
- ✔ Standards: ASME B16.9, MSS SP-75, EN 10253
Chemical Composition (% typical):
| Element | Composition |
|---|---|
| Cr | 24.0 – 26.0 |
| Ni | 6.0 – 8.0 |
| Mo | 3.0 – 5.0 |
| N | 0.24 – 0.32 |
| Mn | ≤ 1.20 |
| C | ≤ 0.030 |
| Fe | Balance |
Heat Treatment of ASTM A815 UNS S32750 Tee
| TABLE 2 Heat Treatment | ||||
|---|---|---|---|---|
| Stainless Steel | Material grade | Temperature | Cooling | Tempering Temperature |
| S32750 | 1880 – 2060 °F [1025 – 1125 °C] | Water quench or rapidly cooled by other means | Not required |
Mechanical Property and hardness of UNS S32750 Tee
| All WP and CR Grades（ WP CR ） | Yield Strength, min | Tensile Strength, ^A ksi [MPa] | Elongation in 2 in. [50 mm] or 4D, min, % | HBW max |
| ksi [MPa] | ||||
| S32750 | 80 [550] | 116 [800] | 15.0 | 310 |
Why Choose S32750 (SAF 2507)?
UNS S32750 is a super duplex stainless steel with high levels of chromium (25%), molybdenum (4%), and nitrogen (0.3%), offering:
- Excellent mechanical strength
- Superior corrosion resistance in seawater
- High temperature tolerance
- Excellent resistance to acids, chlorides, and sulfides
This makes ASTM A815 S32750 Tees ideal for marine, chemical, and oil & gas industries.
Applications of our ASTM A815 S32750 Tee
- Offshore and subsea piping
- Petrochemical and refinery plants
- Desalination units
- Power plants and heat exchangers
- Fire-fighting and ballast water systems
Dimension of ASTM A815 S32750 Tee According to ASME B16.9
| NPS | O.D. D | Center to End C | Center to End M |
| 1/2 | 21.3 | 25 | 25 |
| 3/4 | 26.7 | 29 | 29 |
| 1 | 33.4 | 38 | 38 |
| 1.1/4 | 42.2 | 48 | 48 |
| 1.1/2 | 48.3 | 57 | 57 |
| 2 | 60.3 | 64 | 64 |
| 2.1/2 | 73 | 76 | 76 |
| 3 | 88.9 | 86 | 86 |
| 3.1/2 | 101.6 | 95 | 95 |
| 4 | 114.3 | 105 | 105 |
| 5 | 141.3 | 124 | 124 |
| 6 | 168.3 | 143 | 143 |
| 8 | 219.1 | 178 | 178 |
| 10 | 273 | 216 | 216 |
| 12 | 323.8 | 254 | 254 |
| 14 | 355.6 | 279 | 279 |
| 16 | 406.4 | 305 | 305 |
| 18 | 457 | 343 | 343 |
| 20 | 508 | 381 | 381 |
| 22 | 559 | 419 | 419 |
| 24 | 610 | 432 | 432 |
| 26 | 660 | 495 | 495 |
| 28 | 711 | 521 | 521 |
| 30 | 762 | 559 | 559 |
| 32 | 813 | 597 | 597 |
| 34 | 864 | 635 | 635 |
| 36 | 914 | 673 | 673 |
| 38 | 965 | 711 | 711 |
| 40 | 1016 | 749 | 749 |
| 42 | 1067 | 762 | 711 |
| 44 | 1118 | 813 | 762 |
| 46 | 1168 | 851 | 800 |
| 48 | 1219 | 889 | 838 |
Dimensional Tolerances Straight Tees ASME B16.9
| NPS | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
| Outside Dia at Bevel (D) | +1.6 -0.8 | 1.6 | 1.6 | +2.4 -1.6 | +4 -3.2 | +6.4 -4.8 | +6.4 -4.8 | +6.4 -4.8 |
| Inside Dia at End | 0.8 | 1.6 | 1.6 | 1.6 | 3.2 | 4.8 | +6.4 -4.8 | +6.4 -4.8 |
| Center to End (C / M) | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 |
| Wall Thk (t) | Not less than 87.5% of Nominal Wall Thickness | |||||||
Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.
Documentation & Quality Assurance of UNS S32750 Tee
- Material Test Certificates (EN 10204 3.1 / 3.2)
- PMI (Positive Material Identification) reports
- NDT (Ultrasonic, Radiography) if required
- Dimensional and visual inspection
- Compliance with NACE MR0175 / ISO 15156 for sour service
Other ASTM A815 S32750 Pipes Fittings Include:
- ASTM A815 S32750 Elbows (90°, 45°, SR/LR)
- ASTM A790 UNS S32750 Seamless Pipe
- ASTM A815 S32750 Tees (Equal, Reducing)
- ASTM A815 S32750 Reducers (Concentric, Eccentric)
- ASTM A815 S32750 Caps
- ASTM A815 S32750 Crosses
- ASTM A815 S32750 Stub Ends
All fittings can be supplied with buttweld ends in accordance with ASME B16.9 or MSS SP-43.
