Stainless Steel 316/316L Buttweld Fittings Supplier
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Midland Alloys Inc. is a trusted manufacturer and supplier of Stainless Steel 316/316L Buttweld Fittings, offering durable solutions for welded piping systems. Our product range includes common types like elbows, tees, and reducers, available in both standard and custom sizes. These fittings are made from high-quality stainless steel and meet ASTM and ASME specifications for strength and consistency. Each 316 SS butt weld fitting is carefully produced to ensure reliable performance, especially in demanding environments. With ready stock, affordable pricing, proper packaging, and on-time delivery, we support projects of all sizes. As an ISO certified company, we are committed to quality, making us a dependable source for stainless steel 316L butt weld fitting supply.
What Is SS 316/316L Butt Weld Fitting?
Stainless steel 316/316L butt weld fittings are designed components used to create permanent welded joints in stainless steel piping systems. These fittings are made from austenitic stainless steels containing molybdenum, classified as UNS S31600 for stainless steel 316 and UNS S31603 for stainless steel 316L. In the annealed condition, they remain non-magnetic and retain a stable grain structure during standard fabrication. The fittings are designed for seamless welding and cold or hot forming without loss of mechanical strength. Each ASTM A403 WP316 fitting is manufactured according to ASME B16.9 dimensional requirements and verified chemical standards. A stainless 316 buttweld fitting maintains its shape and structure after standard heat treatment. The 316L SS butt weld fitting is built for reliable integration into welded stainless systems.
Advantages of 316/316L Stainless Steel Butt Weld Fittings
- Molybdenum Content: Enhances pitting resistance and supports chemical stability in aggressive environments.
- Thermal Stability: Maintains mechanical properties under continuous high-temperature exposure.
- Austenitic Grain Structure: Ensures consistent shaping, forming, and stress distribution.
- Post-Annealing Strength: Retains strength and ductility after standard solution annealing.
- Weldability (316L): Low carbon content minimizes carbide precipitation during welding.
- Non-Magnetic Nature: Remains non-magnetic in the annealed state due to its austenitic phase.
SS 316 vs 316L Buttweld Fitting
SS 316 and SS 316L are molybdenum-bearing austenitic stainless steels with strong structural stability in harsh conditions. The main difference is the carbon concentration; ASTM A312 TP316L has less carbon than ASTM A312 TP316 which helps to avoid carbide accumulation when welding. This makes 316L easier to weld and less likely to face intergranular corrosion. Both grades hold their strength when exposed to high temperatures and maintain a stable austenitic grain structure during standard fabrication. In the annealed state, both remain non-magnetic due to their austenitic composition. SS 316 and 316L butt weld fittings are manufactured in line with approved chemical and dimensional standards.
Specification of 316, 316L Butt Weld Pipe Fittings
This section outlines the general specifications of SS 316 and 316L butt weld fittings, including standards, dimensions, types, and sizes as per ASTM A403.
Seamless Butt Weld Fittings: 1/2" - 10" Welded Butt Weld Fittings: 1/2" - 48"
ASTM A403 / ASME SA403
Forge, Cast, Push, Press, etc.
90 Deg. Elbow, 45 Degree Elbow, LR/SR Elbow, Reducers, Tee, Cross, Bends, U bend, 180 Deg Bend, End Cap, Lap-joint Stub End
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10
Plain End, Beveled End, Treaded
SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Seamless / Welded / Fabricated
Types of 316/ 316L ButtWeld Pipe Fittings
316/316L stainless steel buttweld fittings are components used to connect, redirect, or terminate sections of pipe in industrial systems. These fittings are well known for their exceptional strength and resistance to corrosion making them perfect for demanding applications involving high pressure and severe conditions. It is frequently used in pipelines for chemicals, oil and gas, and ships. They are available in various types and sizes to match different piping layouts, and system designs.
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Elbow (90°, 45°, Long/Short Radius)Used to change the direction of flow in a pipeline at specified angles; available in short or long radius.
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Tee (Equal & Reducing)Divides flow into two branches; an equal tee has all ends the same size, a reducing tee has one smaller outlet.
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Reducer (Concentric & Eccentric)Connects pipes of different diameters; concentric type is symmetrical, eccentric has an offset centerline.
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Stub End (Short & Long Pattern)Used with lap joint flanges to allow easy dismantling; available in short and long lengths.
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End CapCloses the end of a pipe to stop flow and protect the system.
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Cross (Equal & Reducing)Connects four pipes; equal type has all ports the same size, reducing type has different sized outlets.
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Lateral TeeBranches pipe at a 45° angle for smoother flow direction changes.
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Pipe BendMakes gradual directional changes in piping with large-radius curves.
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Return Bends (180°)Turns the flow 180 degrees, commonly used in U-shaped configurations.
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CollarProvides a flat surface for bolted connections, often used with flanges.
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NippleShort length of pipe with male threads or beveled ends for close connection between fittings.
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Barred TeeFeatures a bar across the branch opening to prevent flow into unwanted areas, used in piggable systems.
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Expansion JointAbsorbs thermal expansion and vibration in piping systems.
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Swage NippleConnects pipes of different diameters, typically from a larger pipe to a smaller one.
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Reducer InsertInserted into a fitting to reduce the outlet size without using a separate reducer.
Technical Details & Delivery Condition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 316 | min. | – | – | – | – | 16.0 | 2.0-3.0 | 10.0 | – | |
| max. | 0.035 | 2.0 | 0.75 | 0.045 | 0.030 | 18.0 | 14.0 | – | ||
| 316L | min. | – | – | – | – | – | 16.0 | 2.0-3.0 | 10.0 | – |
| max. | 0.035 | 2.0 | 0.75 | 0.045 | 0.030 | 18.0 | 14.0 | – | ||
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 316 | 515 | 205 | 40 | 95 | 217 |
| 316L | 485 | 170 | 40 | 95 | 217 |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 316 | 1.4401 / 1.4436 | S31600 | SUS 316 | 316S31 / 316S33 | – | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
| SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
| NPS (inches) | Schedule | Wall Thickness (mm) | Pressure Rating @100°F (psi) | Pressure Rating @100°F (bar) |
|---|---|---|---|---|
| 2″ | Sch 10S | 2.77 | 450 | 31 |
| 2″ | Sch 40S | 3.91 | 1200 | 82 |
| 2″ | Sch 80S | 5.54 | 1900 | 131 |
| 6″ | Sch 40S | 7.11 | 740 | 51 |
| 6″ | Sch 80S | 10.97 | 1230 | 85 |
Stainless Steel Buttweld Fittings We Offer
Stainless Steel 316/316L Buttweld Fittings Schedule
Pipe schedule indicates wall thickness. Common types like SCH 10, 40, 80 define pressure and flow capacity.| NB | OD | SCH XXS | SCH 80S | SCH 5S | SCH 160S | SCH 10S | SCH 40S | |||||||
| mm | in. | mm | WT (mm) | Weight (kg/m) | WT (mm) | Weight (kg/m) | Weight (kg/m) | WT (mm) | Weight (kg/m) | WT (mm) | WT (mm) | Weight (kg/m) | WT (mm) | Weight (kg/m) |
| 10 | 3/8 | 17.1 | – | – | 3.20 | 1.10 | 0.490 | 1.24 | – | – | 1.65 | 0.63 | 2.31 | 0.845 |
| 25 | 1 | 33.4 | 9.09 | 5.45 | 4.55 | 3.24 | 1.30 | 1.65 | 4.24 | 6.35 | 2.77 | 2.09 | 3.38 | 2.50 |
| 150 | 6 | 168.3 | 21.95 | 79.22 | 10.97 | 42.7 | 11.32 | 2.77 | 67.56 | 18.2 | 3.40 | 13.84 | 7.11 | 28.3 |
| 15 | 1/2 | 21.3 | 7.47 | 2.55 | 3.75 | 1.62 | 0.800 | 1.65 | 1.94 | 4.75 | 2.11 | 1.00 | 2.77 | 1.27 |
| 40 | 1 1/2 | 48.3 | 10.16 | 9.54 | 5.08 | 5.41 | 1.91 | 1.65 | 7.25 | 7.14 | 2.77 | 3.11 | 3.68 | 4.05 |
| 32 | 1 1/4 | 42.2 | 9.70 | 7.77 | 4.85 | 4.47 | 1.65 | 1.65 | 5.61 | 6.35 | 2.77 | 2.70 | 3.56 | 3.38 |
| 50 | 2 | 60.3 | 11.07 | 13.44 | 5.54 | 7.48 | 2.40 | 1.65 | 11.1 | 8.74 | 2.77 | 3.93 | 3.91 | 5.44 |
| 600 | 24 | 609.6 | – | – | 30.96 | 442.08 | 82.47 | 5.54 | 808.22 | 59.54 | 6.35 | 94.45 | 17.48 | 255.41 |
| 65 | 2 1/2 | 73.0 | 14.2 | 20.39 | 7.01 | 11.4 | 3.69 | 2.11 | 14.9 | 9.53 | 3.05 | 5.26 | 5.16 | 8.63 |
| 80 | 3 | 88.9 | 15.24 | 27.65 | 7.62 | 15.2 | 4.51 | 2.11 | 21.3 | 11.1 | 3.05 | 6.45 | 5.49 | 11.30 |
| 300 | 12 | 323.9 | 25.40 | 186.97 | 12.7 | 132.0 | 31.25 | 3.96 | 238.76 | 33.32 | 4.57 | 36.00 | 9.52 | 73.88 |
| 3 | 1/8 | 10.3 | – | – | 2.41 | 0.47 | 0.276 | 1.24 | – | – | 1.24 | 0.28 | 1.73 | 0.37 |
| 100 | 4 | 114.3 | 17.12 | 41.03 | 8.56 | 22.3 | 5.84 | 2.11 | 33.54 | 13.49 | 3.05 | 8.36 | 6.02 | 16.07 |
| 125 | 5 | 141.3 | 19.05 | 57.43 | 9.53 | 31.97 | 9.47 | 2.77 | 49.11 | 15.88 | 3.40 | 11.57 | 6.55 | 21.8 |
| 250 | 10 | 273.1 | 25.40 | 155.15 | 12.7 | 96.0 | 22.63 | 3.40 | 172.4 | 28.6 | 4.19 | 27.78 | 9.27 | 60.5 |
| 200 | 8 | 219.1 | 22.23 | 107.8 | 12.7 | 64.6 | 14.79 | 2.77 | 111.2 | 23.0 | 3.76 | 19.96 | 8.18 | 42.6 |
| 350 | 14 | 355.6 | – | – | 19.05 | 158.08 | 34.36 | 3.96 | 281.70 | 35.71 | 4.78 | 41.3 | 11.13 | 94.59 |
| 6 | 1/4 | 13.7 | – | – | 3.02 | 0.80 | 0.390 | 1.24 | – | – | 1.65 | 0.49 | 2.24 | 0.631 |
| 400 | 16 | 406.4 | – | – | 21.41 | 203.33 | 41.56 | 4.19 | 365.11 | 40.46 | 4.78 | 47.29 | 12.7 | 123.30 |
| 20 | 3/4 | 26.7 | 7.82 | 3.63 | 3.91 | 2.20 | 1.03 | 1.65 | 2.89 | 5.54 | 2.11 | 1.28 | 2.87 | 1.68 |
| 500 | 20 | 508.0 | – | – | 26.19 | 311.2 | 59.25 | 4.78 | 564.68 | 49.99 | 5.54 | 68.71 | 15.09 | 183.42 |
| 450 | 18 | 457.2 | – | – | 23.8 | 254.36 | 46.80 | 4.19 | 466.40 | 45.71 | 4.78 | 53.42 | 14.27 | 155.80 |
SS 304/304L Buttweld Fittings Price Per Kg in India
SS 304 and 304L pipe prices in India vary based on pipe type, size, finish, and market demand. Rates fluctuate regularly due to changes in nickel content, steel base prices, and production costs. Our seamless pipes generally cost more than welded pipes due to higher production complexity. Pricing also depends on wall thickness, outer diameter, freight, and mill availability. Seamless pipes also attract higher GST and lead time, especially in non-standard lengths.
| Nominal Bore | Outside Diameter | Sch-5S | Rates | Sch-10S | Rates | Sch-40S | Rates | ||||
| mm | INCH | mm | Wt mm | Weight (Kg/mt) | Rs/Kg | Wt mm | Weight (Kg/mt) | Rs/Kg | Wt mm | Weight (Kg/mt) | Rs/Kg |
| 3 | 1/8 | 10.3 | 1.24 | 0.276 | 267.500 | 1.24 | 0.28 | 235.40 | 1.73 | 0.37 | 235.40 |
| 6 | 1/4 | 13.7 | 1.24 | 0.390 | 267.500 | 1.65 | 0.49 | 235.40 | 2.24 | 0.631 | 235.40 |
| 10 | 3/8 | 17.1 | 1.24 | 0.490 | 224.700 | 1.65 | 0.63 | 235.40 | 2.31 | 0.845 | 235.40 |
| 15 | 1/2 | 21.3 | 1.65 | 0.800 | 214.000 | 2.11 | 1.00 | 214.00 | 2.77 | 1.27 | 203.30 |
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 203.30 | 2.11 | 1.28 | 203.30 | 2.87 | 1.68 | 192.60 |
| 25 | 1 | 33.4 | 1.65 | 1.30 | 203.30 | 2.77 | 2.09 | 197.95 | 3.38 | 2.50 | 197.95 |
| 32 | 1 1/4 | 42.2 | 1.65 | 1.65 | 203.30 | 2.77 | 2.70 | 197.95 | 3.56 | 3.38 | 197.95 |
| 40 | 1 1/2 | 48.3 | 1.65 | 1.91 | 203.30 | 2.77 | 3.11 | 197.95 | 3.68 | 4.05 | 197.95 |
| 50 | 2 | 60.3 | 1.65 | 2.40 | 203.30 | 2.77 | 3.93 | 197.95 | 3.91 | 5.44 | 197.95 |
| 65 | 2 1/2 | 73.0 | 2.11 | 3.69 | 203.30 | 3.05 | 5.26 | 197.95 | 5.16 | 8.63 | 197.95 |
| 80 | 3 | 88.9 | 2.11 | 4.51 | 203.30 | 3.05 | 6.45 | 197.95 | 5.49 | 11.30 | 197.95 |
| 100 | 4 | 114.3 | 2.11 | 5.84 | 203.30 | 3.05 | 8.36 | 197.95 | 6.02 | 16.07 | 197.95 |
| 125 | 5 | 141.3 | 2.77 | 9.47 | 214.00 | 3.40 | 11.57 | 203.30 | 6.55 | 21.8 | 203.30 |
| 150 | 6 | 168.3 | 2.77 | 11.32 | 219.35 | 3.40 | 13.84 | 214.00 | 7.11 | 28.3 | 208.65 |
| 200 | 8 | 219.1 | 2.77 | 14.79 | 219.35 | 3.76 | 19.96 | 214.00 | 8.18 | 42.6 | 208.65 |
| 250 | 10 | 273.1 | 3.40 | 22.63 | 235.40 | 4.19 | 27.78 | 214.00 | 9.27 | 60.5 | 208.65 |
| 300 | 12 | 323.9 | 3.96 | 31.25 | 235.40 | 4.57 | 36.00 | 224.70 | 9.52 | 73.88 | 208.65 |
| 350 | 14 | 355.6 | 3.96 | 34.36 | 235.40 | 4.78 | 41.3 | 230.05 | 11.13 | 94.59 | 208.65 |
| 400 | 16 | 406.4 | 4.19 | 41.56 | 235.40 | 4.78 | 47.29 | 230.05 | 12.7 | 123.30 | 214.00 |
| 450 | 18 | 457.2 | 4.19 | 46.80 | 235.40 | 4.78 | 53.42 | 230.05 | 14.27 | 155.80 | 214.00 |
| 500 | 20 | 508.0 | 4.78 | 59.25 | 235.40 | 5.54 | 68.71 | 230.05 | 15.09 | 183.42 | 214.00 |
| 600 | 24 | 609.6 | 5.54 | 82.47 | 235.40 | 6.35 | 94.45 | 235.40 | 17.48 | 255.41 | 214.00 |
| NB (MM) | SIZE OD (MM) | THICKNESS (MM) | SCHEDULE | UNIT WT (KG/MTR) | PRICE LIST IN INR (Rs/MTR) | ERW PIPE PRICE ($/MTR) | |
| 15 | 21.30 | 2.11 | 1/2″ | SCH.10S | 1.02 | 231.54 | $ 3.32 |
| 21.30 | 2.77 | 1/2″ | SCH.40S | 1.29 | 292.83 | $ 4.20 | |
| 20 | 26.70 | 2.11 | 3/4″ | SCH.10S | 1.30 | 295.10 | $ 4.23 |
| 26.70 | 2.87 | 3/4″ | SCH.40S | 1.71 | 388.17 | $ 5.57 | |
| 25 | 33.40 | 2.77 | 1″ | SCH.10S | 2.12 | 481.24 | $ 6.91 |
| 33.40 | 3.38 | 1″ | SCH.40S | 2.54 | 576.58 | $ 8.27 | |
| 32 | 42.20 | 2.77 | 1.1/4″ | SCH.10S | 2.73 | 619.71 | $ 8.89 |
| 42.20 | 3.56 | 1.1/4″ | SCH.40S | 3.44 | 780.88 | $ 11.21 | |
| 40 | 48.30 | 2.77 | 1.1/2″ | SCH.10S | 3.16 | 717.32 | $ 10.29 |
| 48.30 | 3.68 | 1.1/2″ | SCH.40S | 4.11 | 932.97 | $ 13.39 | |
| 50 | 60.30 | 2.77 | 2″ | SCH.10S | 3.99 | 905.73 | $ 13.00 |
| 60.30 | 3.91 | 2″ | SCH.40S | 5.52 | 1253.04 | $ 17.98 | |
| 65 | 73.00 | 3.05 | 2.1/2″ | SCH.10S | 5.34 | 1212.18 | $ 17.40 |
| 73.00 | 5.16 | 2.1/2″ | SCH.40S | 8.76 | 1988.52 | $ 28.54 | |
| 80 | 88.90 | 3.05 | 3″ | SCH.10S | 6.55 | 1486.85 | $ 21.34 |
| 88.90 | 5.49 | 3″ | SCH.40S | 11.45 | 2599.15 | $ 37.30 | |
| 100 | 114.30 | 3.05 | 4″ | SCH.10S | 8.48 | 1924.96 | $ 27.62 |
| 114.30 | 6.02 | 4″ | SCH.40S | 16.32 | 3704.64 | $ 53.16 | |
| 125 | 141.30 | 3.40 | 5″ | SCH.10S | 11.74 | 2664.98 | $ 38.24 |
| 141.30 | 6.55 | 5″ | SCH.40S | 22.09 | 5014.43 | $ 71.96 | |
| 150 | 168.30 | 3.40 | 6″ | SCH.10S | 14.03 | 3184.81 | $ 45.70 |
| 168.30 | 7.11 | 6″ | SCH.40S | 28.69 | 6512.63 | $ 93.46 | |
| 200 | 219.10 | 3.76 | 8″ | SCH.10S | 20.27 | 4601.29 | $ 66.03 |
| 219.10 | 8.18 | 8″ | SCH.40S | 43.18 | 9801.86 | $ 140.66 | |
Prices above are approximate and subject to change based on raw material costs, pipe form, and market demand.
Resistance Capabilities
SS 304 and SS 304L pipes show strong corrosion resistance in fresh water, air, and most oxidising environments, thanks to their ~18% chromium content which forms a stable passive film. These grades handle dilute acids like nitric acid but offer limited protection in chlorides and hydrochloric acid. With excellent oxidation resistance, both perform well in temperatures up to 870°C intermittently and 925°C continuously, making them suitable for heat exchangers and furnace parts. Their pitting and stress corrosion cracking (SCC) resistance is generally reliable, though care is advised in chloride-heavy conditions. SS 304L, with its low carbon content, helps reduce carbide precipitation during welding, enhancing durability in high-heat zones.
Manufacturing Process of 316/316L Buttweld Fitting
The process starts with choosing certified SS 316 or 316L billets or plates that meet strict quality standard. Depending on the type of fitting, we precisely cut the raw material. After that, heat or cold forming techniques are used to mold the parts into reducers, tees, elbows, and other shapes. After shaping, we apply solution annealing to improve the grain structure, and remove internal stress. Surface finishing follows, using pickling, passivation, or blasting for a clean, corrosion-resistant surface. Each fitting goes through final inspection and non-destructive testing to confirm quality and performance.
Pipe
Cutting
Forming
Sizing
Heat Treatment
Pickling
Beveling
Polishing
Sand Blasting
Elbow
Inspection
Analytic
Marking
Packing & Shipping
Applications and Uses of Stainless Steel 316/316L Buttweld Fittings
Stainless steel 316 and 316L buttweld fittings are widely used in high-heat environments. They are employed in heat treatment equipment and furnace components where temperature resistance is essential. These fittings are also important in recuperators and heat exchangers, which manage heat flow in industrial systems. In kilns, burners and combustion chambers, they handle thermal stress and support stable operation. Petrochemical units use them for processing fluids and gases under heat and pressure. Thermal oxidizers and incinerator use fittings to manage combustion safely and efficiently. In exhaust systems and flue gas ducts these fittings support the smooth and safe release of hot gases.
We ship buttweld fittings made of 316/316L stainless steel to clients worldwide. We frequently export to Gulf nations having high demand for oil and gas as well as construction, such as the United Arab Emirates, Saudi Arabia, Oman, Qatar, and Kuwait. Our presence is also growing fast in Europe, with steady orders from Germany, the UK, France and Italy. In the Asia-Pacific region, we supply fittings to Singapore, Malaysia, Indonesia, and South Korea. We also reach emerging markets in Africa and Latin America, including South Africa, Egypt, Nigeria, and Brazil. Every export meets customs requirements, with secure packaging, proper port handling, and timely delivery. Over the years, we’ve built trusted relationships with project contractors, OEMs, local distributors, and government buyers who trust us for reliable supply and service.
Why Choose Midland Alloys Inc.
Midland Alloys Inc. is an ISO 9001 certified manufacturer focused on delivering reliable, high-quality fittings. We serve a global network with fast, on-time shipping you can trust on. Get exactly what you need with custom lengths, finishes, and coil forms. Our team is available 24/7, offering full material traceability and quick support. With us, you get trusted service, flexible options, and hassle-free sourcing every step of the way.
Industrial Applications for 316, 316L SS Buttweld fitting
Buttweld fittings made of 316 and 316L stainless steel are frequently utilized in industrial piping systems where durability and resistance to corrosion are essential. In chemical and petrochemical plants, these fittings are used to connect pipelines that carry acids, solvents and other aggressive chemicals. They are used in production lines in food and beverage processing facilities to maintain clean fluid transfer assisting in the prevention of contamination, and guaranteeing adherence to safety standards. Pharmaceutical and bioprocess industries use these fittings in cleanroom piping systems for transporting purified water, sterile air, and process fluids. In marine and offshore applications, 316/316L fittings are used in ballast systems, fuel lines, and cooling systems due to their resistance to saltwater corrosion. They are also employed in heat exchangers and condenser systems, where they help manage temperature and pressure in thermal transfer processes. These fittings are also utilized in brine lines, chemical dosing systems and filtration units in wastewater treatment and desalination facilities, where exposure to strong cleaning agents and chlorides is frequent.
FAQs –SS 316/316L Buttweld Fittings
SS 316L has lower carbon content than SS 316, which improves weldability and reduces the risk of carbide precipitation during welding.
No. Unlike certain other stainless steels, 316L is made especially to reduce the requirement for post-weld heat treatment.
In the annealed condition, both SS 316 and 316L are non-magnetic but they may become slightly magnetic after cold working or welding.
