TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
Add to Cart
Alloy Steel Pipe Hastelloy B-2 Welded steel pipe corrosion-resistant, nickel-molybdenum alloy
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
| Grades and standards: | Material Grade | Specifications | |||||||
| Chemical composition | Pipe | Sheet | Bar | Strip | Wire | Forging | |||
| Seamless | Welded pipe | ||||||||
| Germany DIN VdTÜV | W.Nr.2.461 NiMo28
|
17744 436 | 17751 | 17751 |
17750 436 |
17752 436 | 17750 |
436 | |
| France AFNOR | NiMo28
| ||||||||
| United Kingdom BS | |||||||||
| United States ASTM ASME | UNS N10665
|
B622 SB622 |
B619/626 SB619/626 |
B333 SB333 |
B335 SB335 |
B333 SB333 | |||
| ISO | NiMo28 | 9722 | 6207 | 6208 | 9723 | 6208 | 9724 | 9725 | |
Hastelloy B-2 Chemical composition:
| Ni | Cr | Fe | C | Mn | Si | Cu | Mo | Co | P | S | |
| Min | Margin | 0.4 | 1.6 | 26.0 | |||||||
| Maximum | 0.7 | 2.0 | 0.01 | 1.0 | 0.08 | 0.5 | 30.0 | 1.0 | 0.02 | 0.01 |
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.
| Product | Size mm | Yield Strength RP0.2 N/mm2 | Yield Strength RP1.0 N/mm2 | tensile strength Rm N/mm2 | Elongation A5% | Hardness HB |
| Plate and strip / cold-rolled | ≤5 | 340 | 380 | 755 | 40 | 250 |
| Plate / hot rolling | 5-65 | |||||
| Bar | 325 | 370 | 745 | |||
| Pipe | 340 | 360 | 755 |
Hastelloy B-2 The minimum value of the mechanical properties at room temperature:
| Form | Yield Strength RP0.2 N/mm2 | Yield Strength RP1.0 N/mm2 | ||||||
| 100 | 200 | 300 | 400 | 100 | 200 | 300 | 400 | |
| Plate, Sheet | 315 | 285 | 270 | 255 | 355 | 325 | 310 | 295 |
| Pipe | ||||||||
| Bars, forgings | 300 | 275 | 255 | 240 | 340 | 315 | 300 | 285 |
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.
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.
Cold machelloning:
1. cold need to be solution annealed condition.
2. Hastelloy B-2 work hardening rate is greater than the austenitic stainless steel, so the need for machining equipment to be adjusted accordingly. In the cold working process should be intermediate annealing.
3. If cold rolling is greater than 15%, then the workpiece before use solution treatment.
Hastelloy B-2 Heat treatment:
1. Solution treatment temperature range of Hastelloy B-2 is 1060 ℃ ~ 1080 ℃.
2. For thickness greater than 1.5mm material recommended cooling method for water quenching or rapid air cooling in order to ensure the best corrosion resistance.
3. In all the heat treatment process, should pay attention to compliance with the foregoing matters must be kept clean workpieces.
Hastelloy B-2 to the oxides:
Surface oxide 1. Hastelloy B-2, and the coating oxide color and weld slag around stronger than steel, it is recommended to use fine grain belt or fine grain grinding wheel.
2. Before pickling, carefully polished by sandblasting or break the oxide.
3. Use HNO3 / HF mixed acid pickling appropriate time and temperature. Due to the sensitivity of the alloy to oxidation medium, weight of the alloy may be lost, and along with more nitrogen-containing gas is generated.
Hastelloy B-2 Machining:
Hastelloy B-2 should be carried out after annealing machining, due to the higher rate of work hardening the material, and therefore should be made of stainless steel is lower than the standard austenitic alloy processing low speeds and heavy feed for processing, in order to cut the work hardening below the surface.
