Stainless Steel 347 and 347H Buttweld Fittings are essential components in various industries, particularly in applications where high-temperature and corrosive environments are a concern. These fittings are made from a specific type of stainless steel known as 347 or 347H, which provides excellent resistance to both high temperatures and corrosion, making them a popular choice for demanding applications.
Stainless Steel 347 is a stabilized, austenitic stainless steel alloy with additions of niobium and tantalum, which make it highly resistant to intergranular corrosion and sensitization at elevated temperatures. On the other hand, Stainless Steel 347H is a higher carbon version of 347, offering enhanced high-temperature strength. Both alloys are widely used in industries such as petrochemical, chemical, pharmaceutical, and power generation.
Buttweld fittings, also known as pipe fittings, are used to connect and join pipes, tubing, and other components in a seamless manner. They offer several advantages, including increased strength and resistance to leakage, compared to other methods of pipe connection. Stainless Steel 347 and 347H Buttweld Fittings are designed to be welded directly to the pipes they connect, ensuring a secure and reliable connection.
Table Of Content
Key characteristics and benefits of Stainless Steel 347/347H buttweld fittings include:
High-Temperature Resistance: These fittings can withstand elevated temperatures without losing their structural integrity, making them suitable for applications in high-temperature environments.
Corrosion Resistance: Stainless Steel 347 Pipe Fittings exhibits excellent resistance to corrosion, especially in harsh chemical and acidic environments.
Intergranular Corrosion Resistance: The addition of niobium and tantalum in the alloy helps prevent intergranular corrosion, making them ideal for applications where this is a concern.
Strength and Durability: These buttweld fittings are known for their strength and durability, ensuring a long-lasting and reliable connection between pipes.
Versatility: Stainless Steel 347H buttweld pipe fittings are suitable for a wide range of applications, including pipelines, heat exchangers, and pressure vessels.
Common types of Stainless Steel 347/347H Buttweld Fittings include elbows, tees, reducers, and caps, which are available in various sizes and dimensions to meet specific project requirements.
ASTM A403 / ASME SA403
ANSI B16.9, B16.25, B16.28, MSS-SP-43, MSS-SP-48, MSS-SP-59
Seamless Butt Weld Fittings : 1/2″ – 10″ Welded Butt Weld Fittings : 1/2″ – 48″
Seamless / Welded / Fabricated
SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
from 2 to 40 mm
R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
90 Deg. Elbow, 45 Degree Elbow, LR/SR Elbow, Reducers, Tee, Cross, Bends 1.5d, 3d, 5d, 10d, U bend, 180 Deg Bend, Short / Long stubends, End Cap, Lap-joint Stub End
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 347 | S34700 | – | X6CrNiNb18-10 | 1.4550 | – | – | – |
| 347H | S34709 | – | – | 1.4961 | – | – | – |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347 | min. | – | – | – | – | – | 17.0 | 2.00 | 9.0 | – |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 3.00 | 13.0 | – | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347 | min. | – | – | – | – | – | 17.0 | 2.00 | 9.0 | – |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 3.00 | 13.0 | – | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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