ASTM B723 Welded UNS N06333 Alloy Pipe
- Grade: UNS N06333
- Type: Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy
- Outside Diameter (OD): NPS 1/8″ -12″ (10.3-323.9mm)
- Wall Thickness (WT): SCH 5S, 10S, 40S, 80S, 160S
ASTM B723 UNS N06333 Welded Nickel Alloy Pipe
Golden Sunbird Metals supplies premium ASTM B723 welded UNS N06333 (Alloy 333) nickel-iron-chromium-silicon alloy pipe engineered for exceptional high-temperature strength and outstanding resistance to oxidation, carburization, sulfidation, and nitridation, as well as good resistance to chloride stress corrosion cracking. Available in welded construction per ASTM B723, these alloy pipes are supplied in the as-welded and annealed condition to ensure optimal microstructural stability, ductility, and formability for subsequent fabrication. Ideal for heat-treat furnace components (baskets, trays, muffles, radiant tubes), petrochemical furnace internals, combustion chambers, industrial heat exchangers, waste incineration systems, ore-processing equipment, and high-temperature chemical reactors exposed to severe thermal cycling and aggressive oxidizing/carburizing atmospheres, supplied with EN 10204 Type 3.1 or 3.2 certification and full testing, Golden Sunbird Metals provides reliable, high-performance nickel alloy welded pipe solutions tailored to your exact specifications. Contact us today for a competitive quote and fast global delivery.
Chemical Composition (wt.%) of ASTM B723 Welded UNS N06333 Alloy Pipe
| Element | Composition Limits (%) |
| Carbon | 0.10 max |
| Manganese | 2.0 max |
| Phosphorus | 0.03 max |
| Sulfur | 0.03 max |
| Silicon | 1.5 max |
| Chromium | 24.0–27.0 |
| Nickel | 44.0–48.0 |
| Molybdenum | 2.5–4.0 |
| Cobalt | 2.5–4.0 |
| Tungsten | 2.5–4.0 |
| Iron | Remainder (by difference) |
Mechanical Properties of of ASTM B723 Welded UNS N06333 Alloy Pipe
| Property | Requirement |
| Tensile Strength | Min 80,000 psi (551 MPa) |
| Yield Strength (0.2% offset) | Min 35,000 psi (241 MPa) |
| Elongation in 2 in. or 50 mm or 4D | Min 30% |
| Hardness | 75 to 95 HRB (informative only) |
Features
- Seamless welded pipe covered by ASTM B723 for heat-resisting applications and general corrosive service.
- Outstanding resistance to high-temperature oxidation, carburization, and thermal shock.
- Excellent resistance to hot salt corrosion, metal dusting, and cyclic thermal fatigue.
- Good resistance to chloride and polythionic acid stress corrosion cracking.
- Supplied annealed after welding with oxide removed, in line with ASTM B723 material and manufacture requirements.
Technical Specifications
| Specification | Value |
| Standard | ASTM B723 Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon Alloy Welded Pipe |
| Grade | UNS N06333 (RA 333, Alloy 333, EN 2.4608) |
| Manufacturing Process | Automatic welding |
| Seam Type | Welded |
| Welded Pipe SPS Diameters | Outside Diameter (OD): NPS 1/8″-12″ (10.3-323.9mm), Wall Thickness (WT): SCH5, SCH10, SCH40, SCH80 (1.24-12.7mm) |
| Length | 6000-12000mm |
| Delivery Condition | Annealed |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Chemical analysis, Tensile test, Flattening test, Expansion test, Hydrostatic test, Nondestructive testing (NDT), Intergranular corrosion test, Metallographic examination |
Applications
- Tube hangers in refineries and power boilers.
- Heat-treating muffles, retorts, fixtures, and radiant tubes.
- Flare tips, stack dampers, and furnace fans and shafts.
- Rotary kilns and carburizing furnace conveyor chains / belt pins.
- Gas turbine combustion chambers, transition pieces, and other hot-section components.
- Molten glass process equipment and other severe thermal-cycling service.
