Features

ASTM B 723 UNS N06333 Welded Nickel Alloy Pipe

UNS N06333 Welded Pipe Chemical Composition (wt.%)

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

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)

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

Critical Properties

Excellent resistance to oxidizing and reducing acids: Performs well in environments containing sulfuric acid, hydrochloric acid, nitric acid, and hydrofluoric acid.
Good resistance to localized corrosion: Resists pitting, crevice corrosion, and stress corrosion cracking in chloride solutions.
High-temperature strength: Maintains good mechanical properties at elevated temperatures.
Good weldability: Can be welded using appropriate techniques while maintaining corrosion resistance and mechanical properties.

Packing

Pipes with plain or beveled ends, equipped with caps or bevel protectors. Small diameter pipes are packed in wooden crates or wrapped in woven bags and hexagonally bundled. Large-diameter pipes are loosely packed and wrapped in woven bags.

Application

Heat exchangers and condensers: Used in processes involving mixed acid environments or where both oxidizing and reducing conditions exist.
Reactors and vessels: These are suitable for handling various corrosive chemicals, including sulfuric acid, hydrochloric acid, and organic acids.
Process piping: Used for transporting corrosive fluids under demanding conditions.
Flue gas desulfurization (FGD) systems: Resists the corrosive environment of FGD scrubbers, including sulfuric acid and chlorides.
Wastewater treatment plants: Handles acidic wastewater and chemical treatment processes.
Pharmaceutical and bioprocessing equipment: Offers excellent corrosion resistance and cleanability for handling sensitive materials and aggressive cleaning solutions.
Pulp and paper industry: Used in bleaching and other corrosive chemical applications.
Pickling and metal finishing: Resists the corrosive acids used in pickling and metal finishing operations.