ASTM A815 UNS S32750 Reducer Con.
ASTM A815 specifications cover two broad categories: wrought
ferritic, ferritic/austenitic and martensitic stainless steel
fittings of WP and CR, seamless and welded construction. WP grade
pipe fittings are divided into four subcategories: WP-S, WP-W,
WP-WX and WP-WU. Fitting materials shall include forgings, rods,
plates, or seamless or welded tubing.
The ASTM A815 specification covers two broad categories: WP and CR,
with the latest revision, A960/A960M, covering wrought ferritic,
ferritic/austenitic and martensitic stainless steel fittings of
seamless and welded construction. Fittings that differ from these
standards may be supplied in accordance with Supplementary
Requirement S58 of Specifications A960/A960M. Class CR fittings are
manufactured in accordance with the requirements of MSS SP-43 and
shall have a pressure rating compatible with 13.3. This
specification does not apply to cast accessories.
ASTM A815 UNS S32750 is a specification for butt weld fittings of
wrought austenitic, ferritic, and duplex stainless steels. Designed
for high pressure, high temperature and corrosive environments,
these couplings are used in a variety of industries including oil
and gas, chemical processing, petrochemicals and more. The term
"UNS S32750" refers to a specific grade of duplex stainless steel,
also known as superduplex stainless steel. Duplex stainless steels
are characterized by a mixed microstructure of austenitic and
ferrite phases, which gives them enhanced mechanical properties and
corrosion resistance compared to conventional austenitic stainless
steels
Super Duplex Steel S32750 Butt weld Fittings
ASTM A815 S32750 Super Duplex Steel Pipe Fittings Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS |
| Super Duplex 2507 | 1.4410 | S32750 |
Super Duplex S32750 ASTM A815 Butt weld Fittings Chemical
Composition
| C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
Ferritic/Austenitic Super Duplex Steel 1.4410 Pipe Fittings
Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
