Stainless Steel 253MA Buttweld Fittings Manufacturer & Supplier
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Stainless Steel 253MA Buttweld Fittings are high-performance components designed to withstand extreme temperatures and harsh conditions. These fitting are made of 20.5% chromium, 18.5% nickel, and 7% molybdenum that deliver strength, durability, and excellent oxidation resistance. Midland Alloys, a trusted SS 253MA butt weld fittings manufacturer, supplies a full range of UNS S30815 butt weld fittings that meet ASTM A403 / ASME SA403 standards. Available in 253MA seamless buttweld fittings sizes from ½″–10″ and welded sizes from ½″–48″.
Our fittings are available in various forms such as stub ends, tees, elbows, reducers, swage nipples, barrel nipples, and long-radius bends. We also offer custom dimensions and forms to meet unique project needs worldwide.
Benefits of Stainless Steel 253MA Buttweld Fittings
- Excellent oxidation resistance up to 2000°F.
- High creep rupture strength ensures long-term dependability.
- Highly resistant to cyclic oxidation and combustion gases.
- Strong structural stability at high temperatures.
- Good weldability and ease of fabrication.
- Maintains strength under high pressure and mechanical stress.
- Long service life with low maintenance needs.
Specification of SS 253MA Buttweld Fittings
This section outlines the general specifications of SS 253MA 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 SS 253MA Buttweld Fittings
253MA 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.
- Reducer Insert
Inserted into a fitting to reduce the outlet size without using a separate reducer.
Contact us today to discuss how Stainless Steel 253MA Buttweld Fittings can benefit your application. Whether you need guidance in selecting the right Buttweld Fittings or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Grade | C | Mn | Si | S | Ce | Ni | Cr | P |
| 253 MA | 0.05 – 0.10 | 0.80 max | 1.40 – 2 | 0.030 max | 0.03 – 0.08 | 10 – 12 | 20 – 22 | 0.040 max |
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 600 (min) | MPa |
| Yield Strength (0.2% Proof) | 310 (min) | MPa |
| Elongation | 40 (min) | % |
| Hardness | ≤ 192 | HB |
| Impact Toughness | ≥ 100 | J (at RT) |
| Density | 7.8 | g/cm³ |
| Melting Range | 1390 – 1450 | °C |
| STANDARD | WERKSTOFF NR. | UNS | SS | EN |
| 253 MA | 1.4835 | S30815 | 2368 | X9CrNiSiNCe21-11-2 |
The pressure ratings of SS 253MA fittings across various schedules and temperature ranges for safe usage.
| Temperature (°C) | Pressure Rating (MPa) | Pressure Rating (psi) |
|---|---|---|
| -29 to 38 | 20.0 | 2900 |
| 100 | 17.6 | 2550 |
| 200 | 15.5 | 2250 |
| 300 | 13.5 | 1960 |
| 400 | 12.0 | 1740 |
| 500 | 10.5 | 1520 |
| 600 | 9.0 | 1310 |
Stainless Steel Buttweld Fittings We Offer
Stainless Steel 253MA Buttweld Fittings Pressure Rating Chart
| NPS (inch) | Pipe Sch. | Wall Thk. (in) | OD (inch) | Temperature | ||||
|---|---|---|---|---|---|---|---|---|
| 100 | 200 | 300 | 400 | 500 | ||||
| Allowable Stress (Pressure Rating) | ||||||||
| 16700 | 16700 | 16700 | 15500 | 14400 | ||||
| 1″ | 40 | 0.133 | 1.315 | 2205 | 2205 | 2205 | 2047 | 1902 |
| 80 | 0.179 | 1.315 | 3061 | 3061 | 3061 | 2841 | 2640 | |
| 160 | 0.250 | 1.315 | 4493 | 4493 | 4493 | 4170 | 3874 | |
| 1 1/2″ | 40 | 0.145 | 1.900 | 1629 | 1629 | 1629 | 1512 | 1404 |
| 80 | 0.200 | 1.900 | 2303 | 2303 | 2303 | 2138 | 1986 | |
| 160 | 0.281 | 1.900 | 3362 | 3362 | 3362 | 3120 | 2899 | |
| 2″ | 40 | 0.154 | 2.375 | 1371 | 1371 | 1371 | 1272 | 1182 |
| 80 | 0.218 | 2.375 | 1985 | 1985 | 1985 | 1843 | 1712 | |
| 160 | 0.344 | 2.375 | 3283 | 3283 | 3283 | 3047 | 2831 | |
| 3″ | 40 | 0.216 | 3.500 | 1301 | 1301 | 1301 | 1208 | 1122 |
| 80 | 0.300 | 3.500 | 1844 | 1844 | 1844 | 1712 | 1590 | |
| 160 | 0.438 | 3.500 | 2787 | 2787 | 2787 | 2587 | 2403 | |
| 4″ | 40 | 0.237 | 4.500 | 1102 | 1102 | 1102 | 1023 | 950 |
| 80 | 0.337 | 4.500 | 1596 | 1596 | 1596 | 1482 | 1377 | |
| 160 | 0.531 | 4.500 | 2611 | 2611 | 2611 | 2424 | 2552 | |
| 5″ | 40 | 0.258 | 5.563 | 965 | 965 | 965 | 896 | 832 |
| 80 | 0.375 | 5.563 | 1428 | 1428 | 1428 | 1325 | 1231 | |
| 160 | 0.625 | 5.563 | 2474 | 2474 | 2474 | 2296 | 2133 | |
| 6″ | 40 | 0.280 | 6.625 | 877 | 877 | 877 | 814 | 756 |
| 80 | 0.432 | 6.625 | 1379 | 1379 | 1379 | 1280 | 1189 | |
| 160 | 0.719 | 6.625 | 2382 | 2382 | 2382 | 2211 | 2054 | |
| 8″ | 40 | 0.322 | 8.625 | 771 | 771 | 771 | 716 | 665 |
| 80 | 0.500 | 8.625 | 1218 | 1218 | 1218 | 1131 | 1050 | |
| 160 | 0.906 | 8.625 | 2298 | 2298 | 2298 | 2133 | 1982 | |
| 10″ | 40 | 0.365 | 10.750 | 699 | 699 | 699 | 649 | 603 |
| 80 | 0.594 | 10.750 | 1159 | 1159 | 1159 | 1075 | 999 | |
| 160 | 1.125 | 10.750 | 2289 | 2289 | 2289 | 2124 | 1974 | |
Stainless Steel 904L Buttweld Fittings Dimension
| Nominal Pipe Size | Outside Diameter | 90° Elbows | 45° Elbows | 180° Returns | ||||
| (inches) | Long Radius | Short Radius | Long Radius | Long Radius | ||||
| (mm) | (inches) | Center to Face (inches) | Center to Face (inches) | Center to Face (inches) | Radius (inches) | Center to Center (inches) | Back to face (inches) | |
| 1/2 | 21.3 | 0.840 | 1 1/2 | – | 5/8 | 2 | 1 7/8 | |
| 3/4 | 26.7 | 1.050 | 1 1/8 | – | 7/16 | 2 1/4 | 1 11/16 | |
| 1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 | 3 | 2 3/16 | |
| 1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/4 | 1 | 3 3/4 | 2 3/4 | |
| 1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 | 3 | 4 1/2 | 3 1/4 |
| 2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 | 4 | 6 | 4 3/16 |
| 2 1/2 | 73.0 | 2.875 | 3 3/4 | 2 1/2 | 1 3/4 | 5 | 7 1/2 | 5 3/16 |
| 3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 | 6 | 9 | 6 1/4 |
| 3 1/2 | 101.6 | 4.000 | 5 1/4 | 3 1/2 | 2 1/4 | 7 | 10 1/2 | 7 1/4 |
| 4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 | 8 | 12 | 8 1/4 |
| 5 | 141.3 | 5.563 | 7 1/2 | 5 | 3 1/8 | 10 | 15 | 10 5/16 |
| 6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 | 12 | 18 | 12 5/16 |
| 8 | 219.1 | 8.625 | 12 | 8 | 5 | 12 | 24 | 16 5/16 |
| 10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 | 15 | 30 | 20 3/8 |
| 12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 | 18 | 36 | 24 3/8 |
Prices above are approximate and subject to change based on raw material costs, pipe form, and market demand.
Stainless Steel 904L Buttweld Fittings Weight Chart
| Pipe Elbow Nominal Size | Pipe Elbow Outside Diameter Y | Wall Thickness T (Pipe Elbow Schedule) | 45 Deg. Elbow LR Centre to Face B | 45 Deg. Elbow LR Weight | 90 Deg. Elbow LR Centre to Face A | 90 Deg. Elbow LR Weight | 90 Deg. Elbow SR Centre to Face A | 90 Deg. Elbow SR Weight | ||
| mm | in | mm | mm | Schedule | mm | kg | mm | kg | mm | kg |
| 15 | 1/2” | 21.3 | 2.78 | STD | 15.9 | 0.04 | 38.1 | 0.08 | – | – |
| 3.73 | X.S | 15.9 | 0.05 | 38.1 | 0.10 | – | – | |||
| 20 | 3/4” | 26.7 | 2.87 | STD | 11.1 | 0.04 | 28.6 | 0.08 | – | – |
| 3.91 | X.S | 11.1 | 0.05 | 28.6 | 0.11 | – | – | |||
| 25 | 1” | 33.4 | 3.38 | STD | 22.2 | 0.09 | 38.1 | 0.15 | 25.4 | 0.11 |
| 4.55 | X.S | 22.2 | 0.11 | 38.1 | 0.19 | 25.4 | 0.14 | |||
| 32 | 11/4” | 42.2 | 3.56 | STD | 25.4 | 0.14 | 47.6 | 0.28 | 31.75 | 0.18 |
| 4.85 | X.S | 25.4 | 0.2 | 47.6 | 0.39 | 31.75 | 0.24 | |||
| 40 | 11/2” | 48.3 | 3.68 | STD | 28.6 | 0.2 | 57.1 | 0.4 | 38.1 | 0.26 |
| 5.08 | X.S | 28.6 | 0.25 | 57.1 | 0.5 | 38.1 | 0.35 | |||
| 50 | 2” | 60.3 | 3.91 | STD | 34.9 | 0.36 | 76.2 | 0.72 | 50.8 | 0.5 |
| 5.54 | X.S | 34.9 | 0.5 | 76.2 | 1.0 | 50.8 | 0.68 | |||
| 65 | 21/2” | 73.0 | 5.16 | STD | 44.4 | 0.73 | 95.2 | 1.46 | 63.5 | 0.95 |
| 7.01 | X.S | 44.4 | 0.91 | 95.2 | 1.82 | 63.5 | 1.27 | |||
| 80 | 3” | 88.9 | 5.49 | STD | 50.8 | 1.1 | 114.3 | 2.18 | 76.2 | 1.45 |
| 7.62 | X.S | 50.8 | 1.45 | 114.3 | 2.86 | 76.2 | 1.95 | |||
| 100 | 4” | 114.3 | 6.02 | STD | 63.5 | 2.1 | 152.4 | 4.2 | 101.6 | 2.8 |
| 8.56 | X.S | 63.5 | 2.9 | 152.4 | 5.7 | 101.6 | 3.9 | |||
| 125 | 5” | 141.3 | 6.65 | STD | 79.4 | 3.4 | 190.0 | 6.8 | 127.0 | 4.8 |
| 9.5 | X.S | 79.4 | 5.0 | 190.0 | 10.0 | 127.0 | 6.5 | |||
| 150 | 6” | 168.3 | 7.11 | STD | 95.2 | 5.1 | 229.0 | 10.1 | 152.4 | 6.8 |
| 10.97 | X.S | 95.2 | 7.7 | 229.0 | 15.3 | 152.4 | 10.2 | |||
| 200 | 8” | 219.1 | 8.18 | STD | 127.0 | 10.2 | 305.0 | 20.4 | 203.0 | 13.6 |
| 12.7 | X.S | 127.0 | 15.5 | 305.0 | 30.9 | 203.0 | 20.9 | |||
| 250 | 10” | 273.9 | 9.27 | STD | 159.0 | 18.1 | 381.0 | 36.1 | 254.0 | 24.1 |
| 12.7 | X.S | 159.0 | 24.4 | 381.0 | 48.8 | 254.0 | 32.5 | |||
| 300 | 12” | 323.9 | 9.52 | STD | 190.0 | 26.6 | 457.0 | 53.1 | 305.0 | 35.4 |
| 12.7 | X.S | 190.0 | 35.0 | 457.0 | 70.0 | 305.0 | 46.7 | |||
| 350 | 14” | 355.6 | 9.52 | STD | 222.0 | 34.1 | 533.0 | 68.1 | 356.0 | 45.4 |
| 12.7 | X.S | 222.0 | 45.0 | 533.0 | 90.0 | 356.0 | 60.0 | |||
| 400 | 16” | 406.4 | 9.52 | STD | 254.0 | 45.0 | 610.0 | 89.3 | 406.0 | 59.5 |
| 12.7 | X.S | 254.0 | 59.0 | 610.0 | 118.0 | 406.0 | 78.7 | |||
| 450 | 18” | 457.0 | 9.52 | STD | 286.0 | 56.5 | 686.0 | 113.0 | 457.0 | 75.6 |
| 12.7 | X.S | 286.0 | 75.0 | 686.0 | 150.0 | 457.0 | 100.0 | |||
| 500 | 20” | 508.0 | 9.52 | STD | 318.0 | 85.0 | 762.0 | 140.0 | 508.0 | 93.5 |
| 12.7 | X.S | 318.0 | 112.5 | 762.0 | 186.0 | 508.0 | 124.0 | |||
| 600 | 24” | 610.00 | 9.52 | STD | 381.0 | 101.5 | 914.0 | 203.0 | 610.0 | 135.0 |
| 12.7 | X.S | 381.0 | 134.5 | 914.0 | 269.0 | 610.0 | 179.0 | |||
Prices above are approximate and subject to change based on raw material costs, pipe form, and market demand.
Difference Between 253MA and 316 Stainless Steel Buttweld Fittings
Stainless steel 253MA buttweld fittings perform better in high-temperature and oxidation-prone environments than stainless steel 316 buttweld fittings. ASTM A182 253MA buttweld fittings retain strength and structural stability above 1600°F, whereas 316 grades lose mechanical integrity at such temperatures. 253MA fittings have superior creep resistance and a longer life in cyclic thermal operations, making them ideal for heat-intensive environments. SS 316 fittings perform well in corrosive environments at moderate temperatures.
Manufacturing Process of SS 253MA Buttweld Fittings
The process starts with choosing certified SS 253MA Buttweld Fittings 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
Uses of ASME SA403 WP253MA Butt Weld Fittings
ASTM A403 W/NF253MA butt weld fittings are widely used in industries that demand reliability under extreme conditions. These fittings are applied in offshore oil drilling, maritime operations, and seawater equipment. They are essential components of heat exchangers, condensers, and combustion chambers used in power plants and chemical industries. 253MA stainless steel buttweld fittings are also used in burners, boiler nozzles, expansion bellows, and pulp and paper processing systems. Their versatility makes them suitable in the energy, aerospace, and construction industries.
We ship buttweld fittings made of 253MA 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. for B16.28 253MA Buttweld Fittings
Midland Alloys Inc. is a trusted SS 253MA butt weld fittings supplier in India known for quality. We hold certifications including ISO 9001:2015, PED 2014/68/EU, and EN 10204 3.1/3.2 Mill Test Certificates. Every fitting goes through in-house and third-party inspections, including hydrostatic, ultrasonic, radiographic, and positive material identification tests such as tensile, hardness, and bend tests. We work with EPC contractors, marine operators, and chemical plants, ensuring timely delivery and complete documentation. Clients across the Middle East, Europe, and Southeast Asia trust our ANSI B16.9 253MA buttweld fittings for consistent quality.
FAQs –SS 253MA Buttweld Fitting
These fittings are easy to weld. To achieve the best results, use matching filler metals and maintain proper heat control.
Prices vary by size, type, and order quantity. 253MA fittings cost more than standard grades due to their high alloy content and heat-resistant properties.
The 253MA stainless steel equivalents are UNS S30815, DIN 1.4835, and X9CrNiSiNCe21-11-2, which are known for their high-temperature strength and oxidation resistance.
