Outside diameter (OD)
-
DN15 / 21.30 mm
(4)
-
DN20 / 26.90 mm
(3)
-
DN25 / 33.70 mm
(6)
-
DN32 / 38.00 mm
(1)
-
DN32 / 42.40 mm
(6)
-
DN40 / 44.50 mm
(2)
-
DN40 / 48.30 mm
(4)
-
DN50 / 57.00 mm
(2)
-
DN50 / 60.30 mm
(8)
-
DN65 / 76.10 mm
(7)
-
DN80 / 88.90 mm
(6)
-
DN100 / 108.00 mm
(3)
-
DN100 / 114.30 mm
(7)
-
DN125 / 133.00 mm
(2)
-
DN125 / 139.70 mm
(4)
-
DN150 / 159.00 mm
(2)
-
DN150 / 168.30 mm
(5)
-
DN200 / 219.10 mm
(5)
-
DN250 / 273.00 mm
(2)
Wall thickness (WT)
Steel grade
Angle
Availability
Stainless steel seamless elbow 90° 1,5D (Type 3) DN100 Ø 108 x 4 mm in grade 1.4541 / 321
- Outside diameter (OD): 108 mm
- Wall thickness (WT): 4 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN100 Ø 114,3 x 3,6 mm in grade 1.4541 / 321
- Outside diameter (OD): 114.3 mm
- Wall thickness (WT): 3.6 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN100 Ø 114,3 x 4,5 mm in grade 1.4541 / 321
- Outside diameter (OD): 114.3 mm
- Wall thickness (WT): 4.5 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN150 Ø 168,3 x 4,5 mm in grade 1.4541 / 321
- Outside diameter (OD): 168.3 mm
- Wall thickness (WT): 4.5 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN20 Ø 26,9 x 3,2 mm in grade 1.4541 / 321
- Outside diameter (OD): 26.9 mm
- Wall thickness (WT): 3.2 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN25 Ø 33,7 x 5 mm in grade 1.4541 / 321
- Outside diameter (OD): 33.7 mm
- Wall thickness (WT): 5 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN50 Ø 60,3 x 4 mm in grade 1.4541 / 321
- Outside diameter (OD): 60.3 mm
- Wall thickness (WT): 4 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN50 Ø 60,3 x 5,6 mm in grade 1.4541 / 321
- Outside diameter (OD): 60.3 mm
- Wall thickness (WT): 5.6 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN50 Ø 60,3 x 7,1 mm in grade 1.4541 / 321
- Outside diameter (OD): 60.3 mm
- Wall thickness (WT): 7.1 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN80 Ø 88,9 x 4 mm in grade 1.4541 / 321
- Outside diameter (OD): 88.9 mm
- Wall thickness (WT): 4 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN100 Ø 108 x 5 mm in grade 1.4541 / 321
- Outside diameter (OD): 108 mm
- Wall thickness (WT): 5 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Stainless steel seamless elbow 90° 1,5D (Type 3) DN100 Ø 108 x 6,3 mm in grade 1.4541 / 321
- Outside diameter (OD): 108 mm
- Wall thickness (WT): 6.3 mm
- Steel grade: 1.4541 / 321
Availability:
available
Dispatched within: 3 days
Seamless elbows 1.4541 / 321
Seamless elbows made from stainless steel grade 1.4541 (AISI 321) are purpose-made pipe fittings that change the direction of process lines while offering improved resistance to welding-related corrosion and good performance at elevated temperatures. This page describes what these fittings are, the properties of the 1.4541 / 321 material, typical uses and practical notes for selection and installation.
What are seamless elbows?
Seamless elbows are bent pipe fittings manufactured without a longitudinal weld seam. Because there is no weld running along the length of the body, seamless elbows give:
- Higher integrity under pressure — fewer stress concentrators and a more uniform wall structure;
- Improved corrosion resistance in aggressive media compared with a welded elbow of comparable material;
- Smoother internal flow — useful for hygienic and high-velocity applications.
They are commonly supplied in standard bend angles (for example 45° and 90°) and in short-radius (SR) or long-radius (LR) variants to suit flow and space requirements.
Material: 1.4541 / AISI 321 / X6CrNiTi18-10
The metal used for this category is stainless, titanium‑stabilised austenitic steel, commonly designated as:
- EN: 1.4541
- AISI / ASTM: 321 (UNS S32100)
- DIN: X6CrNiTi18-10
This grade contains approximately 18% chromium and 8–10% nickel and is stabilised with titanium. The titanium ties up carbon during heating and welding, which helps prevent intergranular corrosion (sensitisation) around welds. Key technical characteristics:
- Good corrosion resistance in many chemical and food environments (similar to 304 in general environments, with better behaviour after welding).
- Good weldability with standard joining methods; stabilisation means post-weld heat treatment is often not required for avoiding intergranular attack.
- Suitable for elevated-temperature service and common in heat-exchanger and exhaust applications.
Typical applications and industries
Seamless elbows in 1.4541 / 321 are used where a combination of corrosion resistance, weldability and elevated-temperature stability is needed. Typical sectors include:
- Chemical and petrochemical processing (process lines and exchangers)
- Food and beverage industry (piping exposed to salts and preservatives; hygienic installations)
- Pharmaceutical and cosmetics equipment (agitators, tanks, pipework)
- Heat exchangers, furnace and exhaust components
- Shipbuilding and offshore (piping where material must resist heat and corrosive atmospheres)
- Manufacturing and automotive workshops (small-scale fabrication, exhaust systems)
- HVAC and building services (process and utility piping)
Who should choose seamless elbows 1.4541 / 321?
This category is suitable for contractors, pipefitters, plant engineers, fabricators and maintenance teams who need reliable stainless fittings for process or high‑temperature lines. It is a common choice when:
- you require improved resistance to weld‑related corrosion versus unstabilised 18/8 grades;
- you need smooth internal surfaces for sanitary or high‑velocity systems;
- you prefer the mechanical advantages of seamless construction for pressure or high‑stress applications.
Selection, welding and maintenance notes
Useful practical points when specifying and using 1.4541 seamless elbows:
- Complementary grades: for higher resistance to chlorides or more aggressive acids, consider 316/1.4401 or duplex grades — 1.4541 is not a universal solution for all acids.
- Welding: 321 is readily weldable by TIG, MIG, arc and other standard methods. The titanium stabilisation reduces the risk of intergranular corrosion after welding and often avoids the need for post‑weld annealing in many applications.
- Pressure and temperature: choose the appropriate wall thickness and radius (SR vs LR) to match pressure, flow and installation space requirements.
- Inspection and certification: for critical installations (offshore, pressure equipment, food contact) request material certificates and test documentation.
Available shapes and services
We supply seamless elbows in common angles (45° and 90°), short- and long-radius options, and a range of nominal bore sizes suitable for industrial piping. If you need special dimensions, cutting to length, machining, or customised batches, contact our sales team — we specialise exclusively in stainless, acid‑resistant and heat‑resistant steels (no aluminium or plain carbon steels).
Need help choosing the right elbow? Contact us with your pipe diameter, schedule or wall thickness, required bend angle and application details (media, temperature, pressure) and we will recommend the correct 1.4541 / 321 seamless elbow or an alternative material if more appropriate.