Views: 20 Author: Rachel Publish Time: 2024-08-06 Origin: Site
Hastelloy C4 alloy (UNS N06455) is the most (microstructurally) stable of the widely used nickel-chromium-molybdenum materials, which are well known for their resistance to many aggressive chemicals, in particular hydrochloric acid, sulfuric acid, and chlorides. This stability means that the alloy can be welded without fear of sensitization, i.e. the nucleation and growth of deleterious, second phase precipitates in the grain boundaries of the weld heat-affected zone (HAZ).
Hastelloy C4 is a Nickel-Chromium-Molybdenum alloy that offers exceptional stabilization at the elevated temperatures, good ductility and resistance to corrosion properties. It retains its characteristics even after aging up to 1200℉ to 1900℉ or 649℃ to 1038℃. Alloy C4 offers resistance to grain development precipitation in the welding area so it is highly suitable for the chemical processes in the welding condition. It offers extremely high resistance to stress corrosion cracking and oxidizing conditions up to 1900℉ or 1038℃. Hastelloy C4 offers resistance to mineral acids, organic and inorganic acids, sea water and brine solutions. It has service temperature up to 1900℉ or 1038℃. Outstanding resistance to high temperature corrosion and stress corrosion cracking. Great material for use in chemical processing plants and nuclear fuel processing. Hastelloy c4 equivalent grades:
Haynes C-4: The original manufacturer's designation. Identical alloy.
NS335: Chinese national standard (GB/T) equivalent.
W.Nr. 2.4610: European material number.
NiCr16Mo16Ti: Common European designation highlighting key elements.
JIS NW 4405: Japanese Industrial Standard equivalent.
Composition | Value （%） |
Cr | 14-18 |
Mo | 14-17 |
Fe | ≤3 |
Co | ≤2 |
Mn | ≤1 |
Ti | ≤0.7 |
Si | ≤0.08 |
P | ≤0.04 |
S | ≤0.03 |
C | ≤0.015 |
Ni | Remain |
Like other nickel alloys, it is ductile, easy to form and weld, and possesses exceptional resistance to stress corrosion cracking in chloride-bearing solutions (a form of degradation to which the austenitic stainless steels are prone). With its high chromium and molybdenum contents, it is able to withstand both oxidizing and non-oxidizing acids, and is resistant to pitting and crevice attack in the presence of chlorides and other halides.
As a leading supplier & manufacturer in China, JN Alloy supply cost-effective Hastelloy C4 Products.
1. Classification by thickness: thin plate, medium plate, thick plate, extra thick plate.
A. Thin steel plate is a steel plate with a thickness of 0.2-4mm produced by hot rolling or cold rolling, and thick steel plate is a general term for steel plates with a thickness of more than 4mm. Thin steel plate refers to a steel plate with a thickness of no more than 3mm. The commonly used thin steel plate thickness is 0.5-2MM, and it is supplied in sheets and coils. Thin steel plates are generally Class B steel, cold-rolled or hot-rolled steel plates with steel grades of BO-B3. Requirements for thin steel plates: flat and smooth surface, uniform thickness, tight iron oxide film is allowed, and there must be no defects such as cracks and scars. The process is divided into hot-rolled thin steel plates and cold-rolled thin steel plates. Mainly used in Changlin Dongfeng fans, automobiles, electrical equipment, vehicles, agricultural machinery, containers, steel furniture, etc.
B. Thick steel plates refer to steel plates with a thickness greater than 3mm. Thick steel plates are divided into extra-thick steel plates and medium-thick steel plates.
C. Medium-thick steel plates refer to steel plates with a thickness greater than 3 mm and less than 50 mm. Medium-thick steel plates are mainly used for shipbuilding, boilers, bridges, armor and high-pressure container shells, etc.
D. Extra-thick steel plates refer to steel plates with a thickness of not less than 50 mm. Extra-thick steel plates are mainly used for shipbuilding, boilers, bridges and high-pressure container shells, etc.
2. Classification by production method: hot-rolled steel plates, cold-rolled steel plates.
3. Classification by surface characteristics: galvanized plates (hot-dip galvanized plates, electrogalvanized plates), tin-plated plates, composite steel plates, color-coated steel plates.
4. Classification by use: bridge steel plates, boiler steel plates, shipbuilding steel plates, armored steel plates, automotive steel plates, roofing steel plates, structural steel plates, electrical steel plates (silicon steel sheets), spring steel plates, and others.
Hastelloy C4 plates and sheets are a type of corrosion-resistant alloy (CRA) that finds extensive use in various industries. These components are particularly well-suited for applications in chemical processing, oil and gas production, and marine engineering. Hastelloy C4 plates and sheets are available in two primary forms: hot-rolled (HR) and cold-rolled (CR). Hot-rolled plates and sheets are cost-effective as they require no additional shaping processes. On the other hand, cold-rolled plates and sheets undergo further processing, resulting in greater precision. This makes them ideal for intricate applications where precision is crucial.
One of the significant advantages of Hastelloy C4 plates and sheets is their outstanding resistance to corrosion. These super alloy components exhibit remarkable resistance to a wide range of aggressive substances, including strong acids and alkalis. They are highly resistant to issues like pitting, crevice corrosion, and stress corrosion cracking. As a result, Hastelloy C4 plates and sheets are widely preferred in industries such as chemical processing, pharmaceuticals, and petrochemicals, where corrosive environments are prevalent.
Specifications | ASTM B575 / ASME SB575 |
Standard | ASTM, ASME and API |
Specialize | Shim Sheet, Perforated Sheet, B. Q. Profile. |
Size | 0.5 MM TO 200 MM THICK IN 1000 MM TO 2500 MM WIDTH & 2500 MM TO 12500 MM LENGTH |
Form | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) |
Finish | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
Hardness | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc. |
Grade | Hastelloy C4 (UNS N06455) |
Hastelloy C4 is widely used in the chemical industry, metallurgy, electronics, petroleum, aerospace and other fields. Common applications include a variety of chemical equipment, petrochemical installations, marine engineering, and aerospace engine components. Due to its excellent corrosion resistance, it is widely used in the chemical and petrochemical fields. In the aerospace field, Hastelloy C4 is used as a material for high temperature parts.
Hastelloy C4 performs extremely well in strong reducing acids. Even after welding or high temperatures, it maintains excellent corrosion resistance and toughness and is not easy to become brittle. This means that in applications such as reactors, heat exchangers, furnace internals, and large piping systems, C4 is often a more reliable and economical choice. Hastelloy C22 is known as one of the "benchmarks" in corrosion-resistant alloys, with the widest comprehensive corrosion resistance range and the strongest capabilities. Its performance in strong reducing acids is comparable to or slightly better than C4, and its performance in strong oxidizing acids and media is significantly better than C4. Its resistance to pitting and crevice corrosion is top-notch, and it performs particularly well in environments with high concentrations of chloride ions. Its high chromium content provides excellent oxidation resistance.
In short, Hastelloy C4 is more stable than C22 when used for high temperature + strong acid or large-scale welding. If it is an extremely corrosive environment, C22 has better comprehensive performance, but it costs more than C4. Consulting hastelloy alloy supplier can help you make the best decision.
C276 has a wide range of comprehensive corrosion resistance, especially in medium and low temperature strong reducing acid and mixed environments. It contains high contents of molybdenum and tungsten, is extremely resistant to localized corrosion and is extremely reliable in seawater, salt water and wastewater.
In short, C276 has a wider range of corrosion resistance than C4. However, C4 has better high temperature stability and welding performance, and lower cost. The final decision depends on the specific application or provide detailed application information to your supplier to help you accurately choose the alloy.
