Nickel-based super alloy: Incoloy 803 (UNS S35045)

What is Incoloy 803?

Designated as UNS S35045, Incoloy 803 (also known as Alloy 803) is an iron-nickel-chromium alloy with higher nickel and chromium contents. It has exceptional resistance to high-temperature corrosion in oxidation, sulfidation and carburization environments. Alloy 803 also exhibits excellent stress-rupture strengths at elevated temperatures. Incoloy 803 is used primarily for petrochemical, chemical and thermal processing applications, as well as ethylene furnaces piping.

Incoloy alloy 803 (UNS S35045) is an alloy comprising of iron-nickel and chromium, with a high nickel and chromium content compared to other incoloy alloys. This alloy proves to be a cost effective alternative for replacing other alloys that are used in corrosive reducing, oxidizing and sulfidising environments. The alloy also exhibits good stress-rupture strength at high temperatures. Some of the standard forms of the alloy are pipes, welds, tubes, plate, strip, round, squares and forged fittings.

incoloy 803 plate - Nickel-based super alloy: Incoloy 803 (UNS S35045)

ASTM A240 Incoloy 803 plates, UNS S35045.

This datasheet will look into the chemical composition, properties and applications of incoloy 803.

Chemical Composition of Incoloy 803 (UNS S35045)

Ni Cr Fe C Al Ti Cu S Mn Si
32.0-37.0 25.0-29.0 balance 0.06-0.10 0.15-0.60 0.15-0.60 ≤0.75 ≤0.015 ≤1.5 ≤1.0

Mechanical Properties of Incoloy 803 (UNS S35045)

Tensile Strength Yield Strength Elongation
Mpa ksi Mpa ksi %
572-607 83-88 275-296 40-43 43-47

Form and Condition Tensile strength Yield strength Elongation
MPa MPa %
Tubing, Cold-drawn & Solution Annealed 586-627 275-310 45-50
Plate, Hot-rolled & Solution Annealed 572-607 275-296 43-47
Sheet, Cold-rolled & Solution Annealed 552-621 275-331 40-45
Rod, Hot-finished & Solution Annealed 572-607 207-255 45-50

Physical Properties of Incoloy 803 (UNS S35045)

Density
g/cm3

Young’s Modulus at 70°F (20°C),103
(GPa)

Shear Modulus at 70°F (20°C), 10(GPa) Poisson’s Ratio at 70°F (20°C) Specific Heat
(J/kg*°C)
Permeability at 200 oersted (15.9 kA/m) Melting Range(°C)
7.86 195 73.8 0.32 479 1.001 1365-1400

Product Forms and Standards

Product Form Standard
Plate, sheet and strip ASTM A240, A480
Seamless pipe and tube ASTM A213
Welded tube ASTM A249
Forgings ASTM A182

Characteristics of Incoloy 803 (UNS S35045)

incoloy 803 (uns s35045), an iron-nickelchromium alloy, is designed for use in petrochemical,
chemical and thermal processing applications. The nickel and chromium contents of alloy 803
are higher than those of incoloy alloys 800h and 800ht . The ratios of nickel, iron and chromium
are balanced to provide optimum properties in the temperature range of 1550°f (840°c) to 2100°f
(1150°c). Alloy 803 is a cost-effective material which provides an exceptional level of high-temperature
corrosion resistance in oxidation, sulfidation and carburization environments. Incoloy alloy 803 exhibits
excellent stress-rupture strengths at elevated temperatures.

Applications of Incoloy 803 (UNS S35045)

these characteristics, along with a high resistance to carburization and cyclic oxidation, make incoloy
alloy 803 the material of choice for many severe applications including id-finned pyrolysis tubing in
high-severity ethylene furnaces. Incoloy alloy 803 is produced in all major product forms in a wide variety
of sizes, finishes and tempers. One unique product form is internally finned, either straight or spiralled
fins, cold finished tubing. Strict process controls ensure complete material traceability and structure
consistency throughout the manufacture of all incoloy alloy 803 products.

Source: China Incoloy 803 Flanges Manufcturer – Yaang Pipe Industry (www.steeljrv.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@steeljrv.com

Please notice that you might be interested in the other technical articles we’ve published:

Summary
incoloy 803 plate - Nickel-based super alloy: Incoloy 803 (UNS S35045)
Article Name
Nickel-based super alloy: Incoloy 803 (UNS S35045)
Description
Incoloy alloy 803 (UNS S35045) is an alloy comprising of iron-nickel and chromium, with a high nickel and chromium content compared to other incoloy alloys.
Author
Publisher Name
www.steeljrv.com
Publisher Logo

Related News

  • * 暂无相关文章
العربيةБългарски简体中文繁體中文DanskNederlandsEnglishFrançaisDeutschBahasa IndonesiaItaliano日本語한국어LatinPortuguêsРусскийEspañolதமிழ்ไทยTürkçe