Hastelloy B2 Plate Manufacturer in China

Q: Can Hastelloy B2 plate be used in oxidizing environments?

No. Hastelloy B2 contains virtually no chromium.Because of this,it has zero resistance to oxidizing chemicals like nitric acid,ferric chloride,cupric salts,or wet chlorine gas.Exposure to these media will cause rapid,catastrophic corrosion failure.

Hastelloy B2 Plate

Hastelloy B2 plate is a flat,semi-finished industrial metal segment made from Alloy B2,which is a specialized solid-solution strengthened nickel-molybdenum superalloy.
It is engineered primarily for structural fabrication in heavy-duty chemical processing plants.Unlike standard stainless steels,it contains virtually no chromium,meaning it is built explicitly to survive highly aggressive reducing chemical environments rather than oxidizing ones.

Core Characteristics & Advantages

Hydrochloric Acid Resistance:
It provides unparalleled defense against all concentrations and temperatures of hydrochloric acid.
Immunity to Other Reducing Acids:
It easily withstands pure sulfuric,phosphoric,and acetic acids.
As-Welded Suitability:
Engineered with minimal carbon and silicon,it controls the formation of grain-boundary carbide precipitates in the weld zone.This completely stops intergranular and knife-edge corrosion,eliminating the need for post-weld annealing.
High Mechanical Strengths:
Features a minimum tensile strength of 760 MPa and a minimum yield strength of 350 MPa.

Applications of Hastelloy B2 Plate

Chemical Composition of Hastelloy B2 Plate

Ni	Mes	Fe	Cr	Co	Minnesota	Si	C	P	S
Equilibrio	26.0 – 30.0	≤ 2.0	≤ 1.0	≤ 1.0	≤ 1.0	≤ 0.10	≤ 0.02	≤ 0.04	≤ 0.03

Níquel:
Provides excellent ductility,high-temperature structural stability,and absolute immunity against chloride-induced SCC.
Molibdeno:
The main alloying element that delivers extreme resistance against aggressive reducing chemistry,particularly boiling hydrochloric acid at all concentrations.
Carbon & Silicon:
Drastically reduced compared to its predecessor.This suppression stops carbide precipitation at grain boundaries during welding,allowing plates to be deployed safely in an as-welded state without post-weld annealing.
Cromo:
Kept to an absolute minimum.The lack of chromium means this plate cannot handle oxidizing media and will corrode rapidly if exposed to them.

Hastelloy B2 Standards & Equivalent Designations

Hastelloy B2 Alloy
Standard / System	Equivalent Designation
Número UNS	UNS N10665
DIN / German Werkstoff	W.Nr. 2.4617 / 2.4615
EN Chemical Name	NiMo28
International Organization	ISO NW0665 / ISO 6208
Chinese GB	NS322
JIS	JIS H4551 / H4552
AFNOR	NU-30M
Trade Names	Alloy B2, Hastelloy B2, Nickel Alloy B2

Plates, Sheets, & Strips: ASTM B333 / ASME SB333
Seamless Pipe & Tube: ASTM B622 / ASME SB622
Welded Pipe: ASTM B619 / ASME SB619
Welded Heat Exchanger Tubes: ASTM B626 / ASME SB626
Bars, Rods, & Wires: ASTM B335 / ASME SB335
Forgings & Flanges: ASTM B564 / ASME SB564
Factory-Made Pipe Fittings: ASTM B366 / ASME SB366

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Mechanical Properties of Hastelloy B2 Plate

Mechanical Property	Fuerza de Tensión	Límite elástico, 0,2%	Alargamiento	Dureza
Valor mínimo	≥ 760 MPa(110 ksi)	≥ 350 MPa(51 ksi)	≥ 40%	≤ 241 HBW(100 HRB)

Physical Performance & Behavior

Alta ductilidad:
It can be bent,rolled,and shaped safely without cracking.
Work Hardening Rates:
Heavy-duty,rigid machinery and sharp,carbide-tipped cutting tools are mandatory during drilling or milling operations.
Charpy V-Notch Impact Toughness:
Exhibits excellent cryogenic and room-temperature structural toughness.It does not suffer a sudden ductile-to-brittle transition at low temperatures.

Temperature Limits & Thermal Embrittlement

The Danger Zone (1000°F – 1600°F / 538°C – 871°C):
If exposed to this specific temperature window during service,the alloy forms brittle intermetallic phases (β-Ni₄Mo and γ-Ni₃Mo).This causes a catastrophic drop in ductility,dropping elongation values close to 0% and rendering the plate brittle.
ASME Code Design Limit:
Because of this thermal embrittlement,ASME Section VIII restricts the use of Hastelloy B2 plates in structural pressure vessel boundary applications to a maximum temperature of 800°F (427°C).

Main Manufacturing Methods for Hastelloy B2 Plate

Laminación en caliente

Hot rolling is the initial step in processing Hastelloy B2 slabs into thick-gauge plates.Slabs are heated and rolled between 1093°C and 1232°C.This intense thermal deformation forces dynamic recrystallization,which eliminates casting segregation,refines grain structures,and ensures excellent internal density alongside uniform mechanical properties across the plate.

Laminado en frio

Cold rolling processes hot-rolled plates at room temperature to achieve precise thickness,superior surface finishes,and high tensile strength.Because Hastelloy B2 work-hardens rapidly,hardness spikes while ductility plummets under rolling pressure.An intermediate solution annealing treatment is mandatory at 30% to 40% thickness reduction to prevent cracking.

Solution Annealing & Heat Treatment

Solution annealing is the most critical step for restoring final corrosion resistance and mechanical performance.Plates are heated between 1065°C and 1175°C to dissolve carbides back into the matrix.They must be rapidly water-quenched to bypass the dangerous 538°C–871°C window,preventing brittle phase precipitation at the grain boundaries.

Explosive Bonding

This process uses synchronized mechanical and chemical treatments to remove the stubborn oxide scale formed during high-temperature rolling.Plates are first shot-blasted to fracture the oxide shell,then immersed in hot sulfuric acid followed by a hydrochloric acid mixture.This reveals a clean,passivated finish meeting ASTM B333 standards.

FAQs About Hastelloy B2 Plate

Can Hastelloy B2 plate be used in oxidizing environments?

No.Hastelloy B2 contains virtually no chromium.Because of this,it has zero resistance to oxidizing chemicals like nitric acid,ferric chloride,cupric salts,or wet chlorine gas.Exposure to these media will cause rapid,catastrophic corrosion failure.

What are the temperature limits for Hastelloy B2 plate?

The maximum design temperature for Hastelloy B2 in structural pressure applications is 800°F (427°C).It must never be used in the 1000°F to 1600°F (538°C–871°C) range due to severe thermal embrittlement.

Why is Hastelloy B2 plate difficult to machine?

Like most nickel-base superalloys,Hastelloy B2 exhibits a very high work-hardening rate.During drilling,milling,or cutting,the material hardens instantly under the tool.Overcoming this requires rigid machinery,sharp carbide tools,positive feed rates,and heavy lubrication.

What are the specifications of the Hastelloy B2 sheet you are providing?

Our Hastelloy B2 plates in thicknesses of 2.0, 3.0, and 4.0 are in stock.Non-standard sizes can be customized. Please contacto con nosotros for the latest customized quote.