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Hastelloy B2 Welded Steel Pipe Corrosion Resistant Nickel Molybdenum Alloy

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Brand Name :	Torich
Model Number :	Hastelloy B-2
Certification :	CE PED
Price :	negotiable
Payment Terms :	D/A
Delivery Time :	6-8 weeks

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Hastelloy B2 Welded Steel Pipe Corrosion Resistant Nickel Molybdenum Alloy

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
		Chemical composition	Seamless	Welded pipe	Sheet	Bar	Strip	Wire	Forging
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	Margin	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	340	380	755		250
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.

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