B622 N06455 Hastelloy C4 nickel alloy steel pipe

B622 N06455 Hastelloy C4 nickel alloy steel pipe

Hastelloyc-4 (N06455) hastelloy alloy is an austenite low carbon nickel-molybdenum - chromium alloy.The main differences between Nicrofer6616hMo and other alloys with similar chemical compositions developed earlier are the low carbon, silicon, iron and tungsten contents.The chemical composition in the 650-1040 ℃ show excellent stability, improve the ability of resistance to intercrystalline corrosion, under the condition of appropriate manufacturing can avoid the edge line corrosion sensitivity and weld heat affected zone of corrosion.

 

Features: 

Hastelloy C-4 has outstanding high-temperature stability, and has excellent resistance to stress-corrosion cracking and oxidizing atmospheres up to 1040℃. It has exceptional resistance to a wide variety of chemical process environments, including hot contaminated mineral acids, solvents, chlorine and chlorine contaminated media (organic and inorganic), formic and acetic acids, acetic anhydride, and seawater and brine solutions.

 

Applications: 

Chemical processing involving wet chlorine, hypochloric acid, hydrochloric acid, acetic acid and acetic anhydride; flue gas scrubber systems; pickling operations; and electro-galvanizing.

 

Note: 

Hastelloy is a registered trademark of Haynes International, Inc.

 

Chemical Component

Alloy	%	Ni	Cr	Mo	Fe	Co	C	Mn	Si	S	P	Ti
Hastelloy C-4	Min	Balance	14	14
	Max	Balance	18	17	3	2	0.015	1	0.08	0.03	0.04	0.7

 

Physical Properties

Density	8.94g/cm3
Fusion Point	1325-1370°C

 

Mechanical Property

Alloy and state	Tensile Strength	Yield Strength	Elongation
	RM N/MM2	RP0.2N/MM2	A5%
Hastelloy C-4	650	280	40

 

2. Hastelloyc-4 (N06455) hastelloy alloy mechanical properties:
HastelloyC - 4: ISO - V notch test: average p 120 j/cm2 (room temperature), p 120 j/cm2 (196 ℃).

 

Iii. Hastelloyc-4 (N06455) hastelloy alloy metallographic structure:

Hastelloyc-4 is a surface - centered cubic lattice structure. Its chemical composition guarantees the stability and anti-sensitization of metallographic phase.

3. Hastelloyc-4 (N06455) hastelloy alloy gold corrosion resistance:

High content of molybdenum and chromium enables hastelloyc-4 alloy to resist corrosion of various chemical media, including reducing media, such as phosphoric acid, hydrochloric acid, sulfuric acid, chlorine gas, organic or inorganic chlorine-containing media.Because of the high nickel content, hastelloyc-4 can effectively resist the stress corrosion cracking caused by chlorine, even the hot chloride solution.
Time-temperature-sensitive curve (carbon content 0.008%,)

 

5. Hastelloyc-4 (N06455) hastelloy alloy gold processing performance:

5.1. Hastelloyc-4 alloy processing and heat treatment: hastelloyc-4 alloy can be manufactured and processed through traditional production process.

5.2. Hastelloyc-4 hastelloy alloy heating: keep the workpiece clean and pollution-free before and during heat treatment.

 

In the process of heat treatment can't contact with sulfur, phosphorus, lead and other low melting point metal, or Nicrofer6616hMo alloy will become fragile, attention should be paid to remove such as marking paint, temperature indicating paint, crayons, lubricating oil, fuel and other dirt.

The lower the sulfur content in the fuel, the better. The sulfur content in natural gas should be less than 0.1%, and the sulfur content in heavy oil should be less than 0.5%.Electric furnace heating is a good choice, because electric furnace can accurately control temperature, furnace gas clean.If the furnace gas of gas furnace is pure enough, also can choose.The furnace gas of reheating furnace is suitable to be neutral to micro-reducing, so it should avoid the fluctuation between oxidizing and reducing, and the heating flame cannot be burned directly to the workpiece.

 

5.3, HastelloyC - 4 hartz alloy hot working: HastelloyC - 4 hot working temperature range of 1080 ℃ ~ 900 ℃, the cooling way for fast cooling water or other way.In order to ensure the best anticorrosion performance, solid solution heat treatment should be carried out after thermal processing.

 

5.4. Hastelloyc-4 alloy cold processing: the workpiece should be in a solid solution heat treatment state during cold processing, and the processing hardening rate of hastelloyc-4 is greater than that of austenitic stainless steel, so the processing equipment should be selected.Intermediate annealing should be used in cold rolling.If the deformation amount of cold rolling is more than 15%, the workpiece needs secondary solid solution treatment.

 

6. Hastelloyc-4 hastelloy alloy application scope:

 

Hastelloyc-4 has been widely used in most chemical fields and high temperature environments.
Typical applications: flue gas desulfurization system, acid washing and acid recycling plant, acetic acid and agro-chemical production, titanium dioxide production (chlorine method), electroplating, etc.

7. Hastelloyc-4 hastelloy alloy variety specifications and supply status:

 

7.1, the classification of the varieties: Shanghai treasure island special alloy to produce various specifications of seamless tube, HastelloyC HastelloyC - 4-4 steel, round steel, HastelloyC HastelloyC - 4-4 forging, flange, HastelloyC HastelloyC - 4-4 rings, HastelloyC - 4 welded pipe, steel strip, HastelloyC HastelloyC - 4-4 wire welding material, etc.

 

7.2. Delivery status: seamless tube: solid solution + acid white, length adjustable;Plate: solid solution, acid cleaning, edge cutting;Welding tube: solid solution acid white +RT% detection, forging: annealing + car light;The bar is in the state of forging and rolling, surface polished or car polished;The strip is delivered through cold rolling, solid solution soft state and deoxidized leather.The silk material shall be delivered in the form of solid solution acid washing dish or straight strip and fine grinding state of solid solution straight strip.