Comprehensive introduction to Hastelloy C-276 pipe

Comprehensive introduction to Hastelloy C-276 pipe

 

Hastelloy C-276 is a nickel-chromium-molybdenum alloy known for its exceptional corrosion resistance, making it suitable for various chemical processes. It resists localized corrosion, oxidizing conditions, stress corrosion cracking in chloride-bearing solutions, and pitting.

 

Characteristics

- Corrosion Resistance

Hastelloy C-276 excels in resisting reducing and oxidizing acids like sulfuric, hydrochloric, and acetic acids. It performs well in seawater, chlorides, wet chlorine gas, oxidizing salts, and hypochlorite solutions. The alloy's molybdenum and tungsten content enhance its resistance to localized corrosion and maintain excellent oxidation resistance up to 1900°F (1038°C). It is not recommended for highly oxidizing environments, such as concentrated hot nitric acid.

 

- Elevated Temperature Resistance

Resists oxidation at temperatures up to 1900°F (1038°C).

Mechanical Properties In the annealed condition, it has a yield strength of 41 ksi (345 MPa). It retains excellent toughness at cryogenic temperatures.

 

Heat Treatment

Hastelloy C-276 cannot be strengthened by heat treatment. It is typically solution annealed at 2050°F (1121°C) followed by rapid cooling.

Workability Can be hot worked between 1600°F - 2250°F (870°C - 1230°C). Cold forming is possible but may require intermediate anneals due to its high work-hardening rate.

 

Applications

Hastelloy C-276 is widely used in the chemical processing and oil and gas industries due to its corrosion resistance. It is used for tubing, casing, and liners in sour service environments with high levels of H2S, CO2, and chlorides. The alloy is also employed in pharmaceuticals, paper manufacturing, cryogenic valves, and superconductors at temperatures as low as -455°F (-271°C).

 

Chemical Composition

C	Cr	Ni	Fe	Mn	Si	Mo	Co	P	S	V	W
≤ 0.02	14.5 - 16.5	BAL	4 - 7	≤ 1	≤ 0.08	15 - 17	≤ 2.5	≤ 0.03	≤ 0.03	≤ 0.35	3 - 4.5

(mass %)

 

Specifications

ASTM B622, ASME SB622

 

Specified Mechanical Properties In Annealed Condition

Tensile Strength	Yield Strength	Elongation
minimum, ksi	minimum, ksi	minimum, %
100	41	40

*Higher strength properties can be provided in the cold hardened condition.

 

Typical Physical Properties

Â	Â	70°F	200°F	400°F	600°F	800°F	1000°F	1200°F
Density	lbs/in3	0.321	-	-	-	-	-	-
Thermal Expansion	X10-6/°F	-	6.2	6.7	7.1	7.3	7.4	9.6
Elastic Modulus	103 ksi	29.8	29.1	28.3	27.3	26.4	25.5	22.37
Poisson Ratio	-	0.33	-	-	-	-	-	0.377
Thermal Conductivity	Btu-in/h·ft2·°F	-	77	90	104	117	132	152
Specific Heat	Btu/lb·°F	0.102	-	-	-	-	-	0.14
Yield Strength	ksi	41	40	38	34	33	33	11
Tensile Strength	ksi	100	99	99	94	92	87	44

 

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. May be provided in the annealed or cold hardened condition.

 

Truck Body Liner

Relying on its abrasion resistance and excellent strength, HP Truck Body Liners are widely being applied as good wear solution

We can design and build chutes for many applications where need to solve wear problem. We specialize in the production of our own HP chromium carbide plate. However, we can also make chutes from hardened steel such as mild steel, stainless steel and AR steel.

Feature

1.High wear resistance

2.12-20 times higher than common plate

3.5-10 times than low alloy Steel Plate

4.2-3 times than high chromium cast iron plate

Our service

1. Produce qualified wear resistant parts

2. Design and installation of boltless mill liners

3. Under certain working conditions, the mill liner material selection consulting service will be realized for a longer time service life

4. Grinding machine production and fineness improvement consulting services.

5. We can provide OEM / ODM to our customers.

The processes at most mines involve a wide spectrum of impact, abrasion, erosion, adhesion and corrosion that require engineered hardfacing solutions for effective wear protection. The equipment being affected ranges from large earth excavators to crushers to conveyors to pumps and valves. Mining operations extract mineral raw materials on a truly impressive scale in terms of quantities and material stresses. Moreover, they must handle the increasingly problematic overburden, which as waste material has no value but represents a major factor in the wear of plant components.

Plant maintenance personnel are constantly working to resolve issues with equipment that no longer works as efficiently as it should, or has broken down and must be replaced. With the increased economic pressures impacting the mining industry in recent years, mining operations must plan a more sustainable approach to more efficient operations with an eye towards reduced maintenance expenditures whenever possible. HP Wear Plate offers a suite of powerful engineered hardfacing solutions in all areas of mining and earthmoving activities. Following are a few examples where HP Wear Plate anti-wear solutions are regularly offered:

· Heavy-duty opencast mining equipment: buckets, conveyor belts, shovel loaders, discharge chutes, material slides.

· Mining equipment – surface excavators, earth-moving machines, bucket chain excavators, stackers, front loaders, loader shovels, dragline bucket liners etc.

· Conveyors – screw feeders, material slides, linings of chain conveyors, sides and scrapers of belt conveyors.

· Crushing & screening – crusher body liners, hammers, hopper liners, chute liners, screening deck plates, vibro-feeders, cone crushers, breaker plates.

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