Hastelloy C276 is much stiffer than 304

Hastelloy C-276 Hastelloy, nickel-chromium-molybdenum alloy, high temperature and corrosion resistance.

Overview of Hastelloy C-276 Features and Application Areas:

The alloy has excellent corrosion resistance to most corrosive media in both oxidized and reduced states. Excellent resistance to pitting, crevice and stress corrosion cracking. The alloy is suitable for use in a wide range of chemical process industries containing oxidizing and reducing media.

The high molybdenum and chromium content makes the alloy resistant to chloride ions, and the tungsten element further improves its corrosion resistance. Hasteloy C-276 is one of the few materials that is resistant to moist chlorine, hypochlorite, and chlorine dioxide solutions, and the alloy has significant corrosion resistance to high concentrations of chloride solutions (e.g., ferric chloride and copper chloride).

Hastelloy C-276 is a similar grade:

NIMO16CR15W (Germany) NC17D (France).

Shanghai Boseman.

Shanghai Boseman.

Hasteloy C-276 Metallographic Structure:

The alloy is a face-centered cubic lattice structure.

Hasteloy C-276 Process Performance and Requirements:

1. The lower the sulfur content in the thermal processing fuel, the better, the sulfur content in natural gas should be less, and the sulfur content in heavy oil should be less than.

2. The hot working temperature range of the alloy is 1200 950, and the cooling method is water cooling or rapid air cooling.

3. It is suitable for welding by any traditional welding process, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual subarc welding, metal pole inert gas shielded welding, and melting pole inert gas shielded welding.

Hastelloy C-276 welding consumables are ERNICRMO-4 welding wire and EniCRMO-4 electrode.

Hasteloy C-276 Key Specifications:

Hastelloy C-276 seamless pipe, Hastelloy C-276 steel plate, Hastelloy C-276 round bar, Hastelloy C-276 forging, Hastelloy C-276 flange, Hastelloy C-276 ring, Hastelloy C-276 welded pipe, Hastelloy C-276 steel strip, Hastelloy C-276 straight bar, Hastelloy C-276 wire and supporting welding consumables, Hastelloy C-276 machining parts, etc.

<> I only know that the imported stainless steel plate is twice as heat-resistant than 304.

304 stainless steel is heat-resistant to 750 degrees.

Hastelloy is heat-resistant to about 1400 degrees.

Hastelloy C276 is about 10 degrees harder than 304 stainless steel.

C276 hardness 100 (HRB) tensile strength.

b 690MPa, yield strength.

B 275MPa: Disassembly elongation.

C-276 is a nickel-molybdenum-chromium-tungsten alloy with excellent corrosion resistance and good forging performance, suitable for inorganic acid, organic inorganic chlorine polluted medium for buried stoves, formic acid, acetic acid, acetic anhydride.

The corrosive environment of seawater and salt water solution can withstand pitting, crevice corrosion, and stress corrosion cracking. C-276 is considered one of the most versatile corrosion-resistant materials.

Chemical composition. Below carbon, below phosphorus, below silicon, below nickel, residual cobalt, and below tungsten.

Manganese, sulfur below, chromium below, molybdenum, vanadium below, iron.

Resistance to corrosion.

C-276 alloy is resistant to a wide range of chemical environments, such as hot environments containing inorganic acids, organic and inorganic chlorides.

Contaminated media, hypochlorite, chloride solution, formic acid, acetic acid, acetic anhydride, seawater and brine solution.

The following table shows the corrosion resistance ratings of annealed materials. Corrosion resistance is affected by many factors, such as aeration, corrosive impurities, speed, heat transfer, porosity, temperature, concentration, pH.

stress, surface finish.

contact with foreign metals, etc.

Hastelloy C276 Rockwell hardness is about twenty or thirty degrees.

Hastelloy C-276 is harder than regular stainless steel. The average Rockwell hardness at room temperature reaches RB90 for coils and RB87 for sheets.

Hastelloy C276 is an important nickel-based corrosion-resistant material, because it contains about 16 (mass fraction) of Mo and Cr elements at the same time, so it has strong resistance in both oxidizing and reducing media, and is also known as a general-purpose corrosion-resistant alloy. Compared with general stainless steel and other corrosion-resistant materials, it has the ability to resist various forms of corrosion damage (including uniform corrosion, local corrosion and stress corrosion, etc.) in various corrosion environments (including electrochemical corrosion and chemical corrosion), and has good mechanical properties and processing properties, especially suitable for the harsh medium environment in many fields such as chemical manufacturing, power plant flue gas desulfurization, papermaking, marine development, etc., and is also considered to be one of the most widely used nickel-based corrosion-resistant alloys in the world.

The various corrosion data of Hastelloy C-276 alloy are typical, but they cannot be used as a model for regular posture, especially in an unknown environment, and must be tested before the material can be selected. Hastelloy C-276 alloy does not contain enough CR to resist corrosion in highly oxidizing environments, such as hot concentrated nitric acid. The production of this alloy is mainly for the chemical process environment, especially in the case of mixed acid, such as the discharge pipe of the flue gas desulfurization system.

The mechanical properties of Hastelloy alloy are very outstanding, it has the characteristics of high strength and high toughness, so it has a certain difficulty in machining, and its strain hardening tendency is extremely strong, when the deformation rate reaches 15%, it is about twice that of 18-8 stainless steel. Hastelloy also has a medium-temperature sensitization zone, and its sensitization tendency increases with the increase of deformation rate. When the temperature is high, Hastelloy is easy to absorb harmful elements, which reduces its mechanical properties and corrosion resistance.

hastelloy c-276/uns n10276/(ns334/ns3304)00cr15ni60mo16w4/nimo16cr15w

HASTELLOYC-276 is a tungsten-containing nickel-chromium-molybdenum-alloy-gold with very low silicon and carbon content.

It is often considered a universal anti-corrosion alloy. The alloy has the following properties:

In the oxidized and reduced state, it has excellent corrosion resistance to most corrosive media.

Excellent resistance to pitting, crevice corrosion and stress cracking corrosion.

Hastelloyc-276 is widely used in the chemical and petrochemical fields, such as in elements and catalytic systems that come into contact with chloride-containing organics. The material is particularly suitable for use in high-temperature, inorganic and organic acids (e.g. formic and acetic acids) mixed with impurities, and seawater corrosion.

Other areas of application:

Pulp and paper industry, such as boiling and bleaching vessels.

Scrubbers, reheaters, wet steam fans, etc. in FGD systems Equipment and components operating in sour gas environments.

Reactors for acetic acid and acidic products.

Sulfuric acid condenser.

Methylene diphenyl isocyanate (MDI).

Production and processing of impure phosphoric acid.

First, the density is different.

1. Hastelloy C22: C22 alloy density.

2. Hastelloy C276: C276 alloy density.

Second, the materials are different.

1. Hastelloy C22:.

2. Hastelloy C276:.

C-276 Hastelloy is a nickel-molybdenum-chromium-iron-tungsten nickel-based alloy, which is one of the most resistant to fiber corrosion in modern metal materials. It is mainly resistant to wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salts, and has good corrosion resistance in low temperature and medium temperature hydrochloric acid.

Third, the welding consumables are different.

1. Hastelloy C22:C22 welding consumables are welding wire ERNICRMO-10 and electrode ENICRMO-10.

2. Hastelloy C276: C276 welding consumables are welding wire ERNICRMO-4 and electrode ENICRMO-4.

Hastelloy C-276(00Cr15Ni60Mo16W4)C276 alloy has been widely used in the chemical and petrochemical fields, such as in elements and catalytic systems exposed to chloride-containing organic compounds. This material is particularly suitable for use at high temperatures

Inorganic acids and organic acids mixed with impurities (such as formic acid and acetic acid), seawater corrosion environment.

It can mainly be used to manufacture the following types of equipment or parts:

1.Pulp and paper industry, such as boiling and bleaching vessels.

Scrubbers, reheaters, wet steam fans, etc. in the system:

3.equipment and components operating in an acidic gas environment;

4.Reactors for acetic acid and acidic products.

5.Sulfuric acid condenser.

6.Methylene diphenyl isocyanate (MDI).

7.Production and processing of impure phosphoric acid.

hastelloy g-30 16w4（

The application areas are:

Phosphoric acid equipmentSulfuric acid equipmentNitric acid equipment.

Nuclear Fuel ReprocessingNuclear Waste Disposal

Pickling operations. PetrochemicalsFertilizer production

PesticidesGold ore extraction.

Hastelloy G-30, Hastelloy G-30 UNS N06030

Product characteristics: It has good corrosion resistance to sulfuric acid, and it has better corrosion resistance than most other nickel-based or iron-based alloys for many mixed acids (such as nitric acid and hydrochloric acid) and other strong oxidizing acids in complex environments.

Product application: mostly used in phosphoric acid industry, sulfuric acid industry, nitric acid industry and atomic energy industry. Equipment and components in petrochemical, fertilizer, pesticide production and gold refining.

Product variety: production of various specifications of plates, strips, bars, seamless pipes, welded pipes, wires, wires, rings, flange forgings, fasteners, etc. The maximum diameter of the seamless ring is more than 5000mm, and the thinnest thickness of the strip.

The results of a typical tensile test of C-276 alloy are shown in the table below, and the material is 1150 solution and quenched with water.

Test value of mechanical properties.

Temperature ( Yield Strength (MPa) Tensile Strength b (MPa) Elongation δ5 (%.)

Cold deformation of C-276 alloy increases its strength. In the impact test, the V-groove impact specimen is made of a 10 mm thick plate (the plate is annealed), and if the specimen is welded, it will show some flexibility in the same temperature range, due to the weld. The results of the impact test of the sheet metal are shown in the table below.