Stainless Steel Buttweld Fittings Manufacturer, Supplier & Exporter in India
Stainless Steel Buttweld Fittings manufactured and supplied by Astromet Steel & Engineering are designed for high-strength, leak-proof, and long-lasting pipeline connections. These fittings are welded directly to pipes, ensuring smooth flow characteristics and reduced pressure loss in piping systems.
Buttweld fittings are preferred for high-pressure and high-temperature applications due to their uniform structure and excellent mechanical strength. Stainless steel provides outstanding resistance to corrosion, oxidation, and chemical attack, making these fittings suitable for harsh industrial environments.
Astromet Steel & Engineering offers Stainless Steel Buttweld Fittings in seamless and welded construction. Each fitting is produced under strict quality control to ensure dimensional accuracy and compliance with international standards.
Our Stainless Steel Buttweld Fittings ensure superior performance, long service life, and reliable operation in critical piping systems.
Types Of Stainless Steel Buttweld Fittings
- Elbow (45°, 90°, 180° – Long Radius & Short Radius)
- Tee (Equal Tee, Reducing Tee)
- Reducer (Concentric & Eccentric)
- Stub End (Short & Long Pattern)
- Cross
- Cap
- Bend
- Union
- Coupling
- Nipple
- Ferrule
Stainless Steel Buttweld Fittings Specifications
| Standard | Material Grade | Schedule | Size Range |
|---|---|---|---|
| ASTM A403 / ASME SA403 | WP304 / WP304L / WP316 / WP316L / WP317 / WP321 / WP310 | Sch 10 to Sch XXS | ½” – 48” |
| ASME B16.9 | Dimensional Standard | — | As per ASME |
SS Buttweld Fittings Equivalent Grades
| Grade | ASTM | UNS | EN | DIN | JIS |
|---|---|---|---|---|---|
| SS 304 | A403 WP304 | S30400 | 1.4301 | X5CrNi18-10 | SUS 304 |
| SS 304L | A403 WP304L | S30403 | 1.4307 | X2CrNi18-9 | SUS 304L |
| SS 316 | A403 WP316 | S31600 | 1.4401 | X5CrNiMo17-12-2 | SUS 316 |
| SS 316L | A403 WP316L | S31603 | 1.4404 | X2CrNiMo17-12-2 | SUS 316L |
| SS 317 | A403 WP317 | S31700 | 1.4449 | X5CrNiMo18-15-4 | SUS 317 |
| SS 321 | A403 WP321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
| SS 310 | A403 WP310 | S31000 | 1.4845 | X15CrNi25-20 | SUS 310 |
Stainless Steel Buttweld Fittings Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| SS 304 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–10.5 | — |
| SS 304L | 0.03 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 8.0–12.0 | — |
| SS 316 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| SS 316L | 0.03 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| SS 317 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0–20.0 | 11.0–15.0 | 3.0–4.0 |
| SS 321 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 17.0–19.0 | 9.0–12.0 | — |
| SS 310 | 0.25 | 2.00 | 1.50 | 0.045 | 0.030 | 24.0–26.0 | 19.0–22.0 | — |
Stainless Steel Buttweld Fittings Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| SS 304 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 201 |
| SS 304L | ≥ 485 | ≥ 170 | ≥ 40 | ≤ 201 |
| SS 316 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 217 |
| SS 316L | ≥ 485 | ≥ 170 | ≥ 40 | ≤ 217 |
| SS 317 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 217 |
| SS 321 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 217 |
| SS 310 | ≥ 520 | ≥ 205 | ≥ 40 | ≤ 217 |
Why Choose Astromet Steel & Engineering?
This advanced resistance to intergranular corrosion because of the
- Consistent quality & competitive pricing
- Ready stock & custom fabrication
- International standard compliance
- On-time delivery worldwide
- Complete documentation & certification
Stainless Steel Buttweld Fittings Usage & Applications
Stainless Steel Buttweld Fittings are widely used in industries requiring strong, permanent joints and smooth flow characteristics. These include oil & gas pipelines, chemical and petrochemical plants, refineries, power plants, offshore platforms, pharmaceuticals, and food processing industries.
They are ideal for high-temperature steam lines, pressure piping systems, and corrosive fluid handling applications where long-term reliability is essential.