Alloy 28 Pipe Fittings
Arrow Piping Solutions is a trusted manufacturer, exporter, and supplier of Alloy 28 Pipe Fittings in India. Our fittings are engineered from premium-grade stainless steel and designed for exceptional resistance in corrosive and acidic environments. We offer a full range of products like Alloy 28 Pipe Cap, Alloy 28 Buttweld Fittings, 45° & 90° Elbows, Reducers, Pipe Bends, and Crosses—ideal for industries such as oil & gas, heat exchangers, and chemical processing.
We manufacture Alloy 28 Pipe Fittings in seamless, welded, and fabricated types, available in multiple sizes and schedules. Each product undergoes stringent quality checks and testing for chemical, mechanical, and thermal properties to meet international standards including ASTM A403 / ASME SA403, ASME B16.9, B16.25, B16.28, and MSS-SP-43.
Arrow Piping Solutions offers Alloy 28 fittings from ½" NB to 48" NB in wall thicknesses ranging from Sch 5s to Sch XXS. Our fittings are widely used in applications like heat exchangers, evaporator tubes, and fluid transfer systems where reliability and resistance to strong acids are critical.
| Specification | ASTM A403 / ASME SA403 |
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| Dimension Standard | ASME/ANSI B16.9, B16.25, B16.28, MSS-SP-43 |
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| Size Range | ½" NB to 48" NB |
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| Wall Thickness | Sch 5s, 10s, 40s, 80s, 160s, XXS |
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| Type | Seamless / Welded / Fabricated |
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| Bending Radius | R = 1D to 10D or Custom |
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| NPS | O.D. at Bevel | I.D. at End | Wall Thickness | Elbows/Tees A,B,C,M | 180° Return O | Back-to-Face K | Ends U | Reducers H | Caps E |
| ½ to 2½ | 0.06 | 0.03 | ≥ 87.5% nominal | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 3 to 3½ | 0.06 | 0.06 | ≥ 87.5% nominal | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 4 | 0.06 | 0.06 | ≥ 87.5% nominal | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 5 to 8 | 0.09 | 0.06 | ≥ 87.5% nominal | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.25 |
| 10 to 18 | 0.16 | 0.12 | ≥ 87.5% nominal | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 20 to 24 | 0.25 | 0.19 | ≥ 87.5% nominal | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 26 to 30 | 0.25 | 0.19 | ≥ 87.5% nominal | 0.12 | – | – | – | 0.19 | 0.38 |
| 32 to 48 | 0.25 | 0.19 | ≥ 87.5% nominal | 0.19 | – | – | – | 0.19 | 0.38 |
| Grade | C % | Si % | Mn % | P % | S % | Cr % | Mo % | Ni % | N % | Cu % |
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| Alloy 28 | ≤ 0.02 | 0.70 | 2.00 | 0.03 | 0.01 | 26.0–28.0 | 3.00–4.00 | 30.0–32.0 | ≤ 0.11 | 0.70–1.50 |
| Tensile Strength (Rm) N/mm² | Yield Strength (0.2%) N/mm² | Elongation (%) | Hardness HB | Modulus of Elasticity (kN/mm²) |
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| 500–750 | ≥ 220 | 35/30 | ≤ 230 | 195 |
| STANDARD | WERKSTOFF NR. | UNS | EN |
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| Alloy 28® | 1.4563 | N08028 | X1NiCrMoCuN31-27-4 |
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