Alloys 800HT

Brand name	INCOLOY® Alloy 800HT Nicrofer® 3220 HP

Trade name	Alloy 800 HT

Standards	Material No. 1.4959 EN Designation X8NiCrAlTi32-21 UNS N08811 Alloy 800 HT

Description	Alloy 800 HT / 1.4959 is an austenitic high-strength solid-solution nickel-iron-chromium alloy.

Special properties	Good resistance to reducing, oxidizing and nitriding atmospheres. Metallurgical stability in long-term application at high temperatures.

Chemical Composition	C % 0.05-0.10 Si ≤ % 0.70 Mn ≤ % 1.50 P ≤ % 0.015 S ≤ % 0.01 Cr % 19.0-22.0 Ni % 30.0-34.0 N % ≤ 0.030 Ti ≤ % 0.25-0.65 Cu % ≤ 0.50 Al % 0.25-0.65 Co % ≤ 0.50

Mechanical Properties 20°C	0.2% Yield strength Rp ≥ N/mm² 170 Tensile strength Rm N/mm² 500-750 Elongation A5 ≥ % 35 Resistant on air up to °C 1100 Modulus of elasticity kN/mm² 194

Physical Properties 20°C	Density g/cm³ 7.94 Specific heat capacity J/kg K 460 Thermal conductivity W/m K 12 Electrical resistivity Ω mm²/m 0.99

Suitable welding filler materials	2.4648

Application	Pressure vessels and steam boilers, chemical industry, petrochemical industry

Available forms for 1.4959 / ALLOY 800 HT	Sheets/Plates Bars Wire Tubes/Pipes Fittings Forged / cast parts Finished part (drawing)