INOX STEEL INDIA is one of India’s leading suppliers of High-Nickel Alloy Welded Tubes, engineered for extreme environments where stainless steels fail. These tubes deliver maximum corrosion resistance, exceptional high-temperature stability, high strength-to-weight ratio, and long-term durability in aggressive chemical, marine, and high-pressure systems.
We manufacture and supply welded tubes in Inconel 625, Monel 400, Hastelloy C22, Incoloy 825, meeting stringent international standards ASTM B515, B516, B626.
Our tubes are used across chemical plants, offshore platforms, refineries, desalination plants, fertiliser units, pollution-control systems, and nuclear power stations.
Nickel Alloy Welded Tubes are made from high-nickel alloy plates or strips that are TIG, Laser, or Plasma welded, followed by solution annealing to restore corrosion resistance and mechanical integrity.
| OD (mm) | Wall Thickness (mm) | Typical Application |
| 6 – 12.7 | 0.7 – 1.2 | Instrumentation |
| 12.7 – 25.4 | 0.9 – 2.0 | Chemical process |
| 25.4 – 50.8 | 1.0 – 3.0 | Heat exchangers |
| 50.8 – 114 | 1.5 – 6.0 | Condensers |
| 114 – 168 | 2.0 – 8.0 | Seawater equipment |
| Alloy | Max Service Temperature |
| Inconel 625 | ~980°C |
| Monel 400 | ~550°C |
| Hastelloy C22 | ~600°C |
| Incoloy 825 | ~540°C |
| Environment | 625 | 400 | C22 | 825 |
| Seawater | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Chlorides | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Mixed acids | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Alloy | INR/Kg | USD/Kg |
| Inconel 625 | ₹3,800 – ₹5,800 | $46 – $71 |
| Monel 400 | ₹2,400 – ₹3,600 | $29 – $44 |
| Hastelloy C22 | ₹4,800 – ₹6,800 | $58 – $84 |
| Incoloy 825 | ₹2,600 – ₹4,200 | $31 – $51 |
Q1. Are nickel alloy welded tubes solution annealed?
Yes, mandatory.
Q2. What standards are followed?
ASTM B515 / B516 / B626.
Q3. What OD range is available?
6 mm to 168 mm.