Just-In-Time Manufactured Alloy B-3® Nickel Pipe

Alloy B-3® Nickel Pipe

UNS N10675 / W.Nr. 2.4600

COMMON TRADE NAMES: Hastelloy® B-3

Alloy B-3® is a nickel-molybdenum solid solution strengthened super-alloy with a nominal chemical composition of 65% nickel and 28% molybdenum with additions of iron, manganese, tungsten, and cobalt. It is commonly referred to by the tradename Hastelloy® B-3 and the universal designation UNS N10675. B-3® is known for its resistance to reducing acids, particularly hydrochloric and sulfuric, and also has good thermal stability.

Characteristics

Corrosion Resistance

Alloy B-3® is resistant to non-oxidizing acids, including hydrochloric, sulfuric, and phosphoric acids. However, B-3® has a low chromium content and should not be used in oxidizing acids or salts. The molybdenum content in B-3® confers resistance to chloride-induced localized corrosion, including chloride stress corrosion cracking and chloride-induced pitting and crevice corrosion.

Elevated Temperature Resistance

B-3® does not possess good oxidation resistance and is limited to a maximum service temperature of 800°F (427°C).

Mechanical Properties

B-3® is typically provided in the low-strength annealed condition. It maintains excellent toughness at cryogenic temperatures.

Heat Treatment

B-3® cannot be strengthened by heat treating. It is typically annealed at 1950°F (1065°C) followed by rapid cooling. B-3® should not be exposed to temperatures in the range of 1100°F - 1500°F (593°C - 815°C) for extended periods, as deleterious phases can form in the microstructure leading to cracking. B-3® is a solid solution alloy and does not respond to age hardening.

Workability

B-3® can be cold worked or hot worked through standard methods using common techniques. B-3® is prone to rapid work-hardening, and intermediate annealing treatments may be needed to recover ductility. Solution annealing should be conducted after cold working for optimum corrosion resistance.

Applications

B-3® is used in the chemical process industry to handle concentrated acids and other aggressive media. Other uses include heat-treating fixtures, aerospace, food processing, oil & gas, aerospace, and nuclear power generation. CRA offers specialty alloy B-3® seamless pipe & tube for use in multiple industries and applications, including:

Chemical Processing
Aerospace
Food Processing
Oil & Gas
Nuclear Power Generation
Heat-treating Fixtures

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Chemical Composition

C	Cr	Ni	Fe	Mn	Si	Mo	Co	Ti	W	Al
≤ 0.01	1 - 3	≥ 65	1 - 3	≤ 3	≤ 0.1	27 - 32	≤ 3	≤ 0.2	≤ 3	≤ 0.5

(mass %)

Specifications

ASTM B622, ASME SB622

Specified Mechanical Properties

Per ASTM B622

Tensile Strength	Yield Strength	Elongation
minimum, ksi	minimum, ksi	minimum, %
110	51	40

Typical Physical

		70°F	200°F	400°F	600°F	800°F	1000°F
Density	lbs/in³	0.333	-	-	-	-	-
Thermal Expansion	X10^-6/°F		5.7	6.1	6.3	6.5	7.7
Elastic Modulus	10³ ksi	31.4	30.9	30.1	29.3	28.3	25.7
Poisson Ratio	-	0.3	-	-	-	-	-
Thermal Conductivity	Btu-in/h·ft²·°F	78	83	93	104	116	139
Specific Heat	Btu/lb·°F	0.089	0.092	0.098	0.102	0.104	0.118
Yield Strength	ksi	58	54	48	44	41	34
Tensile Strength	ksi	128	122	115	111	108	88

Manufacturing Process

PROCESS	DESCRIPTION
Steel Making	Electric Arc Furnace followed by Vacuum Oxygen Decarburization (VOD) or Argon Oxygen Decarburization (AOD).
Pipe Making	Conventional Seamless Cold Finished Pipe and Tube Manufacturing Processes.
Heat Treatment	Cannot be hardened by heat treatment. Typically provided in the annealed condition.

Schedule Pipe

Manufacturing Capabilities

CRA offers this alloy in:
Seamless Pipe

MIN OD: 2-1/16″ (2.0625″)
MAX OD: 10-3/4″ (10.750”)
THICKNESS: Up to 1.925”
LENGTHS: Up to 70′

Standard & Non-Standard Sizes Available.

Manufactured Material Available as Quickly as 1 Week.

Non-Standard Mill Quantities Accommodated