Inventory Details

INCOLOY840^® S33400

Main Ingredients

Nickel (Ni)

19.0 ~ 21.0

Chromium (Cr)

18.0 ~ 20.0%

Iron (Fe)

Remaining

Product features

Product Origin

Japan / USA / Germany
Execution Standard

ASTM A240
Main Composition

20Ni-19Cr-Ti, Al

Modulus of Elasticity: 29×10⁶ PSI (200 GPa)

Density: 0.29 lb/in³ (8.03 g/cm³)

Thermal Conductivity:

°F (°C)	Btu·in/(h·ft²·°F)	W/(m·K)
68-132 (20-56)	90.0	12.9
68-204 (20-96)	93.6	13.5
68-333 (20-167)	104.4	15.0
68-465 (20-241)	114.0	16.3
68-590 (20-310)	122.4	17.6
68-726 (20-385)	133.2	19.2
68-848 (20-453)	145.2	20.9

Mechanical Properties

Heating elements are specialized electrical components designed to convert electrical energy into heat. They are widely used in various heating applications due to their ease of use, simple installation, and pollution-free operation. They feature a simple structure, high mechanical strength, high thermal efficiency, safety, reliability, easy installation, and a long service life. They are suitable for various tanks (water, oil, acid, alkali), molten metal furnaces, air heating furnaces, drying ovens, baking ovens, and hot press molds. Specific product forms include hot runner heater bands, heating rods, heating tubes, thermocouples, temperature control boxes, related accessories, and connectors.
Corrosion Resistance

The 840 (S33400) alloy is an austenitic stainless steel that contains titanium and aluminum, along with a sufficient level of chromium that forms a stable chromium oxide layer. This protective scale provides excellent resistance to oxidation and corrosion, even under extreme high-temperature conditions. Compared to traditional chromium-nickel stainless steels like 304, the 840 alloy offers significantly improved high-temperature performance. Its elevated nickel content enhances oxidation resistance beyond that of standard 18-8 stainless steels, delivering performance comparable to higher-grade alloys rated for service temperatures up to 1900°F (1038°C). As a result, 840 (S33400) is well-suited for demanding applications such as heating elements, automotive emission control systems, and other products requiring long-term durability in high-temperature environments.
Application Fields

Due to its formability, weldability, corrosion resistance, and oxidation resistance, 840 alloy is a common material for heating elements. It is used to manufacture electric heating tubes, heat exchangers, equipment heaters, industrial heating furnaces, and is also frequently used in automotive exhaust systems.
Supply Form

Coiled Strip

Our Partners

Aerospace and Aviation

Our materials jointly fend off corrosion from high-altitude moisture, fuel residues, and extreme atmospheric conditions, endure intense temperatures and extreme pressure changes, fit both core operations and routine equipment needs, ensuring safe flight operations, minimal maintenance demands, and long-lasting reliability for commercial jets, military aircraft, and spacecraft.

Marine Engineering

Our materials collectively resist corrosion from saltwater, seawater mist, and marine organisms, withstand extreme temperatures and pressure fluctuations, suit both critical operations and general equipment needs, ensuring safe marine operations, low-maintenance costs, and long-lasting industrial performance in harsh ocean environments.

Petrochemical industry

Our materials collectively resist corrosion from harsh substances like acids and chlorides, and withstand high temperatures in demanding processes. These materials suit both critical operations and general equipment needs to ensure safe, low-maintenance, and long-lasting industrial operations.

Automotive

Our materials collectively resist corrosion from road salts, moisture, and engine fluids, withstand high temperatures in powertrain and exhaust systems, suit both critical operations and general equipment needs, ensuring safe vehicle performance, low-maintenance requirements, and long-lasting durability under daily driving and harsh road conditions.

Biopharmaceuticals

Our materials collectively resist corrosion from harsh bioprocess fluids, withstand stable temperatures in precise production processes, suit both critical operations and general equipment needs, ensure safe drug production, low-maintenance facility running, and long-lasting industrial operations that meet strict regulatory standards.

Construction & Infrastructure

Our materials jointly fend off corrosion caused by rainfall, dampness, and urban contaminants—key for withstanding outdoor exposure—bear heavy weights and harsh weather, fit both vital applications and everyday equipment uses, guaranteeing safe infrastructure operation, reduced upkeep expenses, and enduring structural reliability for public and commercial developments.

Electronics

Our materials jointly resist corrosion from moisture, dust, and chemical coolants, endure stable temperatures in high-heat components, fit both core operations and routine equipment needs, ensuring reliable electronic performance, reduced maintenance efforts, and long-lasting durability for consumer gadgets, industrial controls, and telecom hardware.

Energy Industry

Our materials jointly ward off corrosion from fuel byproducts, high-pressure fluids, and environmental elements, endure extreme temperatures in power generation and transmission, fit both core operations (oil/gas well casings, renewable energy hardware) and routine equipment needs, ensuring safe energy production/transmission, cut maintenance costs, and long-term reliability across fossil fuel and clean energy sectors.

Environmental industry

Our materials collectively resist corrosion from industrial waste, acidic/alkaline effluents, and chemical treatments, withstand temperature variations in waste processing and water treatment systems, suit both critical operations and general equipment needs, ensuring safe environmental remediation, low-maintenance facility upkeep, and long-lasting performance in waste management and sustainability-focused processes.

Medical

Our materials collectively resist corrosion from sterilizing agents and bodily fluids, maintain structural stability in precision medical devices, suit both critical operations and general equipment needs, ensure safe patient care, low-maintenance device upkeep, and long-lasting performance that meets strict medical regulatory standards.

Aerospace and Aviation

Marine Engineering

Petrochemical industry

Automotive

Biopharmaceuticals

Construction & Infrastructure

Electronics

Energy Industry

Environmental industry

Medical

What are you looking for?

INCOLOY840^® S33400

Main Ingredients

Product features

Product Origin

Execution Standard

Main Composition

Physical Properties

Mechanical Properties

Corrosion Resistance

Application Fields

Supply Form