ASTM B435 Hastelloy X Sheet

ASTM B435 Hastelloy X sheet represents the apex of nickel-chromium-iron-molybdenum superalloys, engineered precisely for applications demanding structural stability under extreme thermal stress. HT PIPE is a hastelloy x sheet supplier with 15+ export experience. Contact us for more information and quotes for free!

 

Whether you are spec'ing out afterburner components in Houston, Texas, upgrading industrial furnace rolls in Chicago, Illinois, or designing catalyst support grids in Frankfurt, Germany, this guide provides the foundational data and hyper-localized procurement strategies required to source high-compliance Alloy X sheets.

UNS N06002 Chemical Composition(WT %)

Hastelloy x	Cr	Mo	Co	W	Al	Ti	B	C	Fe	Mn	Si	P	S	Cu	Ni
Min	20.5	8	0.5	0.2	–	–	–	0.05	17	–	–	–	–	–	–
Max	23	10	2.5	1	0.5	0.15	0.01	0.15	20	1	1	0.04	0.03	0.5	Bal

 

2.4665 Hastelloy X Mechanical Properties

Temp deg f	0.2% Proof Stress MPA	Tensile Strength MPA	Elongation %
70	324	720	46
1000	286	648	45
1200	272	472	37
1400	261	435	37
1600	177	252	51

 

ASTM B435 Hastelloy X Standard Specification

Specification	ASTM B435 / ASME SB435
Thickness	Ranging from 0.3mm to 20mm
Length	2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm.
Width	1000mm / 1219mm /1250mm / 1500mm / 2000mm
Hardness	As per ASME A & NACE MR 175
Finish	Hot rolled plate (HR), Cold rolled sheet (CR)

 

Fabrication Realities: Welding and Forming

A material is only as good as its workable potential. Fortunately, despite its extreme hot-hardness, Hastelloy X industrial sheet is highly adaptive to standard machine shops.

Cold & Hot Forming Guidelines

Due to excellent room-temperature ductility (averaging 44-45% elongation), the material can be deep-drawn, stamped, or press-brake formed. However, because it work-hardens rapidly, severe deformations require intermediate stress-relief annealing. For hot working, the entire sheet must be brought to an even temperature of 2150°F (1177°C) before handling.

 

Welding Protocols

Unlike older generation superalloys prone to micro-fissuring, Hastelloy X features excellent weldability. It matches perfectly with multiple fabrication techniques:

Gas Tungsten Arc Welding (GTAW / TIG)

Gas Metal Arc Welding (GMAW / MIG)

Shielded Metal Arc Welding (SMAW / Stick)

Critical Fabrication Note: To restore the optimal structural balance of properties and prevent secondary-phase precipitation (which reduces ductility), all finished or heavily cold-worked parts should be solution heat-treated at 2150°F (1177°C) and rapidly air or hydrogen quenched.

 

Industrial Environments and Deployment Profiles

The true marker of Alloy X sheet utility is its dynamic atmospheric tolerance. Where other superalloys crumble due to carburization or nitriding, Hastelloy X thrives.

Aerospace Propulsion and Gas Turbines

In modern aviation, combustion zones experience wild thermal cycling. AMS 5536 Hastelloy X sheets are fabricated directly into transition ducts, combustor cans, spray bars, and flame holders. The alloy absorbs high thermal energy without excessive volumetric expansion, protecting critical turbine geometries.

 

Petrochemical Refining & Chemical Processing

Industrial teams handling hydrocarbon cracking face structural vulnerabilities like stress-corrosion cracking (SCC). Thanks to its balanced nickel-molybdenum synergy, Hastelloy alloy X plates and sheets offer superior protection against ambient organic acids and high-temperature pyrolysis operations.

 

Industrial Vacuum Furnaces

In structural heat-treating facilities, components face an endless mix of oxidizing, reducing, and neutral gases. Furnace components built from Hastelloy X cold rolled sheet frequently exceed 8,700 hours of continuous service at punishing temperatures like 2150°F (1177°C) without catastrophic oxidation failure.

 

 

 

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