Description
Table Of Content
- Specification of Stainless Steel 904L Pipe Fittings
- Various Sizes of ASTM B366 WP904L Buttweld Fittings
- Available 904L SS Fittings Stock list
- Types 904L Stainless Steel Fittings
- Chemical Composition of SS 904L Buttweld Pipe Fittings
- Mechanical Properties Chart of UNS N08904 Pipe Fittings
- 904L Fittings Equivalent grades
904L Stainless Steel Pipe Fittings
904L stainless steel pipe fittings are high-alloy austenitic components designed for use in highly corrosive environments. Made from UNS N08904 (WNR 1.4539), these fittings offer excellent resistance to sulfuric acid, chlorides, and seawater corrosion. With high nickel (25%) and added copper content, 904L fittings are superior to conventional 316L and 317L grades in harsh chemical processing conditions. SASA FLANGE supplies a full range of 904L pipe fittings including elbows, tees, reducers, caps, and stub ends, manufactured in accordance with ASTM A403 WP904L and ASME B16.9 standards. These fittings are widely used in chemical plants, seawater systems, offshore oil platforms, and heat exchangers requiring long-term corrosion resistance and mechanical durability.
Specification of Stainless Steel 904L Pipe Fittings
| Dimensions | ASME B16.28, MSS-SP-43, ASME/ANSI B16.9, BS4504, BS10, BS4504, BS1560, |
|---|---|
| Thickness | SCH10, SCH 80, SCH 100, SCH20, SCH30, STD SCH40, SCH 160, XXS, SCH60, XS, SCH 120, SCH 140, available with NACE MR 01-75 |
| Type | DN15-DN1200 |
| Connection | Welding |
| Bending Radius | R=2D, 3D, 5D, 6D, 8D, 1D, 10D or Custom |
| Manufacturing process | Press, Forge, Push, Cast, etc. |
| Specialized manufacturer of | Tees, Crosses, Reducers, 90º Elbows, Stub End, Pipe Bend, 45º Elbows, Pipe Cap |
Various Sizes of ASTM B366 WP904L Buttweld Fittings
- UNS N08904 Seamless ButtWeld Fittings : 1/2 – 10 inch
- 904L SS Welded Pipe Fittings : 1/2″ – 48″
- ASME SB366 904L Fittings : ½” NB to 24″ NB
904L SS Fittings Stock list
| SS B366 904L Fittings | Stainless Steel 904L Pipe Fitting |
| Stainless Steel 1.4539 90 Degree Elbow | ASME SB366 904L End Cap |
| UNS N08904 45 Degree Elbow | ASTM B366 904L Buttweld Fitting |
| 904L Stainless Steel 1D Elbow | 904L SS Short Stub End |
| ASTM B366 904L Stub End | SS B366 904L Pipe Cap |
| Stainless Steel 1.4539 3D Elbow | 904L Stainless Steel End Cap |
| ASTM B366 904L 5D Elbow | Stainless Steel 904L Reducer |
| SS B366 904L Buttweld Fittings | ASME SB366 904L Pipe Bend |
| UNS N08904 Pipe Fittings | 904L Stainless Steel Long Stub End |
| ASTM B366 904L Eccentric Reducer | ASME SB366 904L Long Radius Elbow |
| 904L SS Concentric Reducer | Stainless Steel 1.4539 Short Radius Elbow |
| UNS N08904 Equal Cross | Stainless Steel 904L Pipe Cap |
| SS B366 904L Lateral Tee | ASME SB366 904L Cross Tee |
| 904L SS Reducing Cross | ASTM B366 904L Equal Cross |
| Stainless Steel 904L Equal Tee | 904L Stainless Steel Stub End |
| Stainless Steel 1.4539 Concentric Reducer | UNS N08904 5D Elbow |
Types 904L Stainless Steel Fittings
| Types of Fittings | ||
|---|---|---|
 | |  |
| Pipe Cap | Pipe Elbow | Euqal-tee |
Chemical Composition of SS 904L Buttweld Pipe Fittings
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| SS 904L | 0.020 max | 2.00 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 23.00 – 28.00 | 1.00 – 2.00 |
Mechanical Properties of UNS N08904 Pipe Fittings
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
904L Fittings Equivalent grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | KS | AFNOR | EN |
| SS 904L | 1.4539 | N08904 | SUS 904L | 904S13 | STS 317J5L | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
