Hastelloy X Plate

Q: What is the difference between Hastelloy X and Hastelloy C276?

Hastelloy X is a high-temperature superalloy designed to resist extreme thermal oxidation,carburization,and thermal shock in gas turbines and furnaces. Hastelloy C276 is a corrosion-resistant alloy designed primarily to withstand aggressive aqueous chemicals,wet chlorine gas,acids,and pitting at low to moderate temperatures.

Q: Does Hastelloy X plate require post-weld heat treatment?

In most standard applications,no PWHT is required.Welded joints using matching filler metals (like ERNiCrMo-2) retain excellent ductility and high tensile strength in the as-welded condition.However,for severe,high-stress creep applications,a full solution annealing treatment (2150°F to 2175°F followed by a rapid quench) can be performed to optimize microstructural uniformity.

Q: Why is Hastelloy X preferred over stainless steel in industrial furnaces?

Standard stainless steels suffer from rapid thermal softening,heavy scale flaking,and severe embrittlement due to carburization or nitriding under furnace conditions.Hastelloy X plates form a highly adherent,protective chromium-rich oxide scale that blocks carbon/nitrogen absorption and maintains structural integrity through thousands of hours of thermal cycling.

Q: Can Hastelloy X plates be cold formed?

Да. Due to its high nickel content,Hastelloy X possesses excellent ductility and can be formed using standard cold-working methods like bending, rolling,and drawing.However,because it work-hardens very rapidly,higher forming forces are required compared to standard carbon steel,and intermediate solution annealing may be necessary for severe deformations.

A Hastelloy X plate is a flat-rolled industrial component made from Hastelloy X,which is a high-performance,nickel-chromium-iron-molybdenum superalloy.
This material is globally recognized for its exceptional high-temperature strength,excellent fabricability,and outstanding oxidation resistance at temperatures up to 2200°F (1200°C).

Key Properties & Technical Specifications

High-Temperature Performance:
Unlike traditional stainless steels,it retains high tensile,yield,and creep-rupture strength under extreme heat.
Environmental Resistance:
It is highly resistant to oxidizing,reducing,and neutral atmospheres,as well as stress-corrosion cracking,carburization,and nitriding.
Fabrication & Welding:
It is readily weldable and formable by both manual and automated methods,keeping its ductile traits even after thousands of hours of high-temperature service.

Applications of Hastelloy X Plate

We offer Hastelloy X plates and sheets in thicknesses of 1.0, 1.5 and 2.0.We offer not only листы нержавеющей стали and sheets but also plates made of Hastelloy,Incoloy,Inconel,Monel,and other alloys.Our products comply with ASTM A240,EN 10204,ISO 9001,PED 2014/68/EU ,CE,and other standards.With over a decade of experience in manufacturing and import/export,we are your best wholesaler in China.

Chemical Composition of Hastelloy X Plate

Ni	Cr	Fe	Пн	Co	W	C	Mn	Si	Al, Ti, B, P, S
Остаток средств	20.5 – 23.0	17.0 – 20.0	8,0 – 10,0	0.50 – 2.50	0.20 – 1.0	0,05 – 0,15	≤ 1.0	≤ 1.0	< 0.50 each

Key Metallurgical Characteristics

Solid-Solution Strengthening:
Hastelloy X does not rely on age-hardening or phase precipitation (like Gamma Prime in other superalloys) to gain strength.The large atomic radii of Molybdenum and Tungsten distort the Nickel matrix,structurally locking it against high-stress deformation up to 2200°F (1200°C).
Exceptional Carburization & Nitriding Resistance:
The high Chromium and Nickel content prevents carbon and nitrogen atoms from diffusing into the plate surface in furnace environments.This blocks internal structural embrittlement.
Post-Exposure Ductility:
After being exposed to critical soaking zones of 1200°F to 1600°F (650°C to 870°C) for over 16,000 continuous hours,the plate maintains excellent residual toughness and ductility.

Critical Processing Advice

Forming & Workability:
Thanks to the high nickel percentage,the plate boasts exceptional cold-working capabilities.However,it work-hardens rapidly compared to carbon steels,requiring high-powered equipment.
Welding Parameters:
The chemical mix yields excellent weldability with a low susceptibility to hot cracking.It can be welded via TIG,MIG,or resistance welding methods using matching ERNiCrMo-2 filler metal.

Physical Properties of the Plate

Density:
8,22 г/см³ (0.297 lb/in³)
Melting Range:
2300°F – 2470°F (1260°C – 1355°C)
Magnetic Permeability:
Completely non-magnetic in the annealed condition.

Hastelloy X Plate Standards & Equivalent Designations

Hastelloy X / Alloy X (High-Temperature Superalloy)
Стандарт / Система	Эквивалентное обозначение	Форма продукта	GB (Китай)	GJB (Military)	GOST (Russia)
Китайский стандарт	GH3536 (GH536 / GH36)	Plates, Sheets & Strips	GB/T 15007	GJB 3317A	GOST 24982
Russian / CIS Standard	KhN60VT / HN60VT (ХН60ВТ / ЭИ868)	Bars & Rods	GB/T 14994	GJB 3165	GOST 5632
ISO Chemical Name	NiCr22Fe18Mo / NiCr21Fe18Mo9	Seamless Pipes & Tubes	GB/T 15008	GJB 2297	GOST 14162
UNS System	UNS N06002	Welded Pipes & Tubes	–	–	–
Aviation / Aerospace	AMS 5536 / Werkstoff 2.4665	Forgings & Rings	GB/T 14993	GJB 3167	–
European / ASTM Designation	ASTM B435 / EN NiCr22Fe18Mo
Generic Trade Name	Hastelloy X, Alloy X, Inconel HX, Nicrofer 4722

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Mechanical Properties of Hastelloy X Plate

Механические свойства при комнатной температуре

When annealed according to standard specifications (such as ASTM B435 or AMS 5536), Hastelloy X plates display exceptional strength and high ductility at room temperature.

Механические свойства	Typical Metric Value	Typical Imperial Value
Ultimate Tensile Strength	785 MPa	114,000 psi
Предел текучести (смещение 0,2%)	360 MPa	52,000 psi
Elongation at Break (in 2 inches)	43%	43%
Hardness (Rockwell B)	88 HRB	88 HRB

High-Temperature Tensile Properties

As a solid-solution strengthened superalloy,Hastelloy X is explicitly engineered to minimize thermal softening.The following data shows how its mechanical strength evolves under extreme heat:

At 1200℉(650℃):
Yield Strength remains high at approximately 260 MPa,with an Ultimate Tensile Strength of 540 MPa.
At 1600℉(870℃):
Yield Strength holds at around 180 MPa,and UTS is 255 MPa.
At 2000℉(1095℃):
Even near its melting point,the plate retains a measurable UTS of about 60 MPa,resisting sudden catastrophic failure.

Creep and Stress-Rupture Behavior

In long-term engineering applications like gas turbines,creep (gradual deformation under constant thermal stress) is the primary structural threat.Hastelloy X plates demonstrate exceptional creep-rupture strength:

1500℉(815℃):A constant stress of 66 MPa is required to cause structural rupture at exactly 1,000 hours.
1800℉(980℃):The alloy can withstand a stress of 15 MPa for 1,000 hours before failure occurs.

Key Metallurgical & Mechanical Phenomena

Excellent Thermal Fatigue Resistance:
The alloy withstands repeated,rapid heating and cooling cycles without thermal cracking or warping.This makes it ideal for gas turbine combustor liners.
Exceptional Post-Aging Ductility:
Unlike many cobalt- or iron-base superalloys that become extremely brittle after prolonged heating,Hastelloy X retains significant impact toughness and room-temperature ductility even after 10,000+ hours of service in the 1200℉ to 1600℉ range.
Модуль упругости:
The Young’s Modulus drops from 205 MPa at room temperature to approximately 143 GPa at 1600℉,demonstrating its predictable, elastic load-bearing limits.

Fabrication Impacts on Mechanical Properties

Укрепление работоспособности:
Because of its high nickel and chromium matrix,Hastelloy X work-hardens exceptionally fast during cold forming.Heavy-duty machine tools and steady feed rates are necessary to prevent localized brittleness.
Post-Weld Properties:
Welded joints utilizing matching filler metal (ERNiCrMo-2) retain up to 90 – 95% of the original base metal’s tensile strength without mandatory post-weld heat treatment,though a full solution anneal is recommended for maximum creep resistance.

Our Advantages in Manufacturing Hastelloy X Plate

Advanced Melting Technology

We utilize premium melting methods, combining Vacuum Induction Melting and Electroslag Remelting.This dual-refining process eliminates gas impurities,minimizes trace elements,and ensures an exceptionally clean metallurgical structure.Consequently,our plates deliver uniform chemical stability and predictable performance under high-stress operating environments.

Precision Gauge Control

Our manufacturing facility features automated,heavy-duty rolling mills integrated with real-time laser gauge monitoring.This setup allows us to achieve incredibly tight thickness tolerances and excellent surface flatness across both thin sheets and thick plates.This dimensional accuracy reduces your material waste and minimizes the need for extensive post-machining.

Optimized Heat Treatment

We employ fully automated,atmosphere-controlled solution annealing furnaces operating precisely between 2150°F and 2170°F (1175°C to 1185°C),followed by rapid water quenching.This exact control completely dissolves secondary phases into the nickel matrix,unlocking the alloy’s maximum high-temperature creep strength and superior cold-forming ductility.

Rigorous Quality Assurance

Every single plate undergoes comprehensive,certified testing to guarantee complete compliance with aerospace and industrial standards like AMS 5536 and ASTM B435.Our testing protocol includes non-destructive ultrasonic inspection,high-temperature tensile testing, grain size analysis,and full chemical product analysis with complete heat traceability.

FAQs About Hastelloy X Plate

What is the difference between Hastelloy X and Hastelloy C276?

Hastelloy X is a high-temperature superalloy designed to resist extreme thermal oxidation,carburization,and thermal shock in gas turbines and furnaces.

Hastelloy C276 is a corrosion-resistant alloy designed primarily to withstand aggressive aqueous chemicals,wet chlorine gas,acids,and pitting at low to moderate temperatures.

Does Hastelloy X plate require post-weld heat treatment?

In most standard applications,no PWHT is required.Welded joints using matching filler metals (like ERNiCrMo-2) retain excellent ductility and high tensile strength in the as-welded condition.However,for severe,high-stress creep applications,a full solution annealing treatment (2150°F to 2175°F followed by a rapid quench) can be performed to optimize microstructural uniformity.

Why is Hastelloy X preferred over stainless steel in industrial furnaces?

Standard stainless steels suffer from rapid thermal softening,heavy scale flaking,and severe embrittlement due to carburization or nitriding under furnace conditions.Hastelloy X plates form a highly adherent,protective chromium-rich oxide scale that blocks carbon/nitrogen absorption and maintains structural integrity through thousands of hours of thermal cycling.

Can Hastelloy X plates be cold formed?

Да.Due to its high nickel content,Hastelloy X possesses excellent ductility and can be formed using standard cold-working methods like bending, rolling,and drawing.However,because it work-hardens very rapidly,higher forming forces are required compared to standard carbon steel,and intermediate solution annealing may be necessary for severe deformations.

Hastelloy X Plate

Hastelloy X Plate