Corrosion Resistance Welded Steel Tube / Alloy Steel Tubing For Chemical Industry

Hastelloy B-2 is a corrosion-resistant, nickel-molybdenum alloy solid solution state.

Hastelloy B-2 It has the following features:

● control of iron and chromium in the minimum content, prevent the generation of β phase Ni4Mo.
● The reducing environment of excellent corrosion resistance.
● excellent resistance to moderate concentrations of sulfuric acid and a number of non-oxidizing acid corrosion.
● good resistance to chloride stress corrosion cracking resistance reduction (SCC).
● Excellent corrosion resistant ability of various organic acids

Hastelloy B-2 Grades and standards:

DIN W.Nr.2.461 NiMo28 / ASTM / ASME UNS N10665

Hastelloy B-2 Chemical composition:

Hastelloy B-2 Physical properties:

Density:ρ=9.2g/cm3

Melting temperature range:1330～1380℃

Hastelloy B-2 Mechanical behavior:

The following is the appropriate solution treatment specifications state Hastelloy B-2 performance, special performance specifications of other special materials depending on the particular application.

Hastelloy B-2 The minimum value of the mechanical properties at room temperature:

Application:

Hastelloy B-2 has been widely used in chemical, petrochemical, energy production and pollution control areas, especially in sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries. When applied to specific areas, please consult the material supplier.

Hastelloy B-2 processing and heat treatment

Heating:

1. Before heat treatment and heat treatment process should always be kept clean and pollution-free piece, which is very important.
2. In the heating process can not contact with sulfur, phosphorus, lead and other low melting point metal, otherwise it will impair the performance of the alloy, Hastelloy B-2 so brittle. It should be noted remove paint, such as marking, temperature indication paint, crayons, chalk, oil, various liquids and oil, fuel and other stains.
3. fuel sulfur content as low as possible, the total content of natural gas and liquefied petroleum gas should be less than 0.1% sulfur content of sulfur in the city gas no more than 0.25g / m3, the sulfur content of the fuel should be less at 0.5 %.
4. The furnace gas must be clean and slightly reductive appropriate, should avoid furnace gas fluctuates between oxidation and reduction, heated by the flame is not burning directly to the workpiece.
5. The fast should be heated to the desired temperature.

Thermal processing:

1. Hastelloy B-2 thermal processing temperature range of 1160 ℃ ~ 900 ℃, cooling water quenching.
2. To ensure the best corrosion resistance, thermal processing should be carried out after annealing.
3. thermal processing, the workpiece should be directly added to the warmed heat treatment furnaces.