ASTM B167 covers seamless nickel-chromium-iron alloy tubes and pipes designed for high-temperature service, oxidation resistance, carburizing atmospheres, and corrosion-resistant industrial applications. Inconel 600 (UNS N06600) and Inconel 601 (UNS N06601) are widely used in heat treatment furnaces, petrochemical systems, thermal processing equipment, and power generation industries due to their excellent structural stability under elevated temperatures.
These seamless tubes are manufactured through hot extrusion, cold pilgering, and solution annealing processes to achieve precise dimensional tolerance, superior surface finish, and reliable mechanical performance in severe operating environments.
| Item | Description |
|---|---|
| Product Name | ASTM B167 Inconel 600 Pipe / Inconel 601 Tube |
| Standard | ASTM B167 / ASME SB167 |
| Material Grades | UNS N06600 (Inconel 600), UNS N06601 (Inconel 601) |
| Manufacturing Process | Cold Drawn / Hot Finished / Seamless |
| Outside Diameter | 6 mm - 127 mm |
| Wall Thickness | 1 mm - 30 mm |
| Length | 1 - 12 m, custom cut lengths available |
| Tolerance | According to ASTM B167 or customer specification |
| Straightness | ≤ 1.5 mm/m |
| Surface Finish | Annealed & Pickled (AP), Bright Annealed (BA), Polished |
| Heat Treatment | Solution Annealed |
| Tube Type | Straight Tube / U Tube |
| End Type | Plain End / Beveled End |
| Testing | Eddy Current Test, Hydrostatic Test, PMI, Flattening Test |
All mother tubes and billets are supplied with full EN 10204 3.1 material certification and Positive Material Identification (PMI) verification to ensure compliance with ASTM B167 chemical composition requirements.
Multi-pass cold pilgering and controlled annealing processes improve concentricity, wall thickness consistency, and surface roughness, especially for heat exchanger and furnace tube applications requiring tight dimensional tolerance.
Each production batch can undergo flattening tests, flaring tests, intergranular corrosion inspection, and high-temperature tensile verification to ensure stable operation in thermal cycling and corrosive industrial environments.
| Standard System | Standard |
|---|---|
| ASTM | ASTM B167 |
| ASME | ASME SB167 |
| EN | EN 10216-5 |
| JIS | JIS G4902 |
| GB | GB/T 15007 |
| GOST | GOST 5632 |
Inconel 601 seamless tubes are extensively used in ethylene cracking furnace radiant sections where continuous exposure to carburizing atmospheres and temperatures above 1000°C requires exceptional oxidation and creep resistance.
| Element | UNS N06600 | UNS N06601 | UNS N06690 | UNS N06025 | UNS N06045 |
|---|---|---|---|---|---|
| Nickel | 72.0 min | 58.0 - 63.0 | 58.0 min | Balance | 45.0 min |
| Chromium | 14.0 - 17.0 | 21.0 - 25.0 | 27.0 - 31.0 | 24.0 - 26.0 | 26.0 - 29.0 |
| Iron | 6.0 - 10.0 | Balance | 7.0 - 11.0 | 8.0 - 11.0 | 21.0 - 25.0 |
| Carbon | 0.15 max | 0.10 max | 0.05 max | 0.15 - 0.25 | 0.05 - 0.12 |
| Manganese | 1.0 max | 1.5 max | 0.5 max | 0.15 max | 1.0 max |
| Silicon | 0.5 max | 0.5 max | 0.5 max | 0.5 max | 2.5 - 3.0 |
| Copper | 0.5 max | 1.0 max | 0.5 max | 0.1 max | 0.3 max |
| Sulfur | 0.015 max | 0.015 max | 0.015 max | 0.010 max | 0.010 max |
| Aluminum | -- | 1.0 - 1.7 | -- | 1.8 - 2.4 | -- |
| Titanium | -- | -- | -- | 0.1 - 0.2 | -- |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| UNS N06600 | ≥ 550 | ≥ 240 | ≥ 30 | ≤ 195 HB |
| UNS N06601 | ≥ 550 | ≥ 205 | ≥ 30 | ≤ 220 HB |
| UNS N06690 | ≥ 585 | ≥ 240 | ≥ 30 | ≤ 220 HB |
| UNS N06025 | ≥ 650 | ≥ 300 | ≥ 25 | ≤ 250 HB |
| UNS N06045 | ≥ 570 | ≥ 275 | ≥ 30 | ≤ 230 HB |