1.4876 Stainless Steel – Heat Resistant Alloy for demanding Applications
The material 1.4876, internationally known as Alloy 800, is an austenitic iron-nickel-chromium alloy renowned for its excellent resistance to heat and corrosive environments. This alloy is widely used in applications requiring thermal stability, mechanical strength, and chemical resistance – such as in furnace construction, chemical and petrochemical industries, and hydrogen technology.
Physical Properties at 20 °C
- Density: 8.0 kg/dm³
- Electrical resistivity: 1.01 Ω·mm²/m
- Thermal conductivity: 12.4 W/m·K
- Specific heat capacity: 443 J/kg·K
- Melting range: 1350–1400 °C
Typical Applications of 1.4876 Material
Common application areas for 1.4876 material include:- Equipment construction for high-temperature use
- Chemical and petrochemical industries
- Industrial furnace construction
- Power plant engineering
- Components in hydrogen technology
Alloy 800 Data Sheet – Chemical Composition Overview
The primary elements and their respective weight percentages are:
| Nickel (Ni): | 30,0 – 32,0 % |
| Chromium (Cr): | 19,0 – 21,5 % |
| Iron (Fe): | 41,0 – 47,0 % |
| Aluminum (Al): | 0,2 – 0,4 % |
| Titanium (Ti): | 0,2 – 0,5 % |
| Manganese (Mn): | 0,5 – 1,0 % |
| Silicon (Si): | 0,2 – 0,6 % |
| Carbon (C): | min. 0 - max. 0,1 % |
Mechanical Properties at Room Temperature
| Yield strength Rp0.2: | ≥ 210 N/mm² |
| Tensile strength Rm: | ≥ 500 N/mm² |
| Elongation A5.65: | ≥ 30 % |
| Modulus of elasticity: | approx. 194 kN/mm² |
What Does Material Number 1.4876 Represent?
The designation 1.4876 refers to a standardized austenitic alloy designed for use at elevated temperatures. Known by the EN designation X10NiCrAlTi32-20, it is classified internationally as Alloy 800 or under the UNS number N08800.
Applicable Standards for Alloy 800
Alloy 800 complies with a variety of industry standards and material specifications:
● EN: 1.4876
● DIN: X10NiCrAlTi32-20
● AISI: Alloy 800
● UNS: N08800
Are Alloy 800 and Incoloy 800 the same?
Yes, Incoloy 800 is a trademarked name that refers to the same material as Alloy 800. Both terms are used interchangeably in the industry and describe an identical chemical composition and performance profile.
Differences Between Alloy 800, Alloy 800H, and 800HT
Alloy 800 is available in modified versions for enhanced performance under specific conditions:
● Alloy 800: Standard grade, suitable for temperatures up to approx. 600 °C
● Alloy 800H (material 1.4876H): Solution-annealed for greater strength at temperatures above 600 °C
● Alloy 800HT: Optimized with tighter tolerances for carbon and aluminum, enhancing high-temperature strength
Corrosion Resistance and Processing of 1.4876 Stainless Steel
Thanks to its high nickel and chromium content, 1.4876 stainless steel is resistant to oxidation and stress corrosion cracking in high-temperature environments. It performs well under oxidizing and nitriding conditions. However, its resistance in sulfur- and salt-rich media is limited.
Weldability and Machinability
Alloy 800 can be welded using standard processes such as TIG, MIG, and manual arc welding. Low heat input, clean surfaces, and controlled heat distribution are crucial during
