X8CrNiAlTi32-21

HuaNickel  X8CrNiAlTi32-21 is a nickel-iron-chromium superalloy, which has high-temperature strength and the ability to resist oxidation and high-temperature corrosion. Its high nickel content gives it excellent resistance to stress corrosion cracking in aqueous corrosion conditions. The high chromium content makes it more resistant to pitting corrosion and crevice corrosion cracking. The alloy has good corrosion resistance to nitric acid and organic acids, but has limited corrosion resistance in sulfuric acid and hydrochloric acid. In addition to the possibility of pitting corrosion in halides, there is good corrosion resistance in both oxidizing and non-oxidizing salts.

X8CrNiAlTi32-21Chemical composition：

	Ni	Cr	Fe	C	Mn	Si	Cu	AI	Ti	P	S	AI+Ti
Min	19	19	43	0.06	0.5	0.2		0.2	0.3			0.85
Max	32	22	50	0.1	1	0.6	0.5	0.6	0.6	0.015	0.01	1.2

X8CrNiAlTi32-21Physical properties：

Specific heat(J/kg･K)		460
Resistivity(μΩ･cm)		99
Thermal conductivity(W/m･K)		12.6
Average coefficient of thermal expansion(10-6/℃)	25–200℃	15.9
	25–400℃	16.8
	25–600℃	17.3
	25–800℃	18.1
Longitudinal modulus of elasticity(MPa)		19.7 x 104
Curie Point(℃)		-115
ferromagnetic		not
melting point(℃)		1357-1385

X8CrNiAlTi32-21Mechanical properties：

0.2%Yield strength	Tensile strength	Elongation	Hardness
(N/mm2)	(N/mm2)	(%)
			(HV)	(HB)
≧ 170	≧ 450	≧ 30	―	―

X8CrNiAlTi32-21Alloy properties：

High Temperature Resistance: X8CrNiAlTi32-21 is able to withstand extremely high temperatures and is suitable for environments up to 500°C and beyond. This stability at high temperatures makes it widely used in aerospace, nuclear industry, and other fields.

Corrosion resistance: The alloy has excellent corrosion resistance, especially in aqueous media and nitric acid-containing environments. Its high nickel content and special chemistries (e.g. low carbon, high chromium) provide good resistance to stress corrosion cracking and resistance to pitting and crevice corrosion cracking.

X8CrNiAlTi32-21Uses of alloys：

It is widely used in a variety of industrial fields, such as high-temperature heat exchangers, nitric acid condensers, high-temperature furnaces and high-temperature pipelines. X8CrNiAlTi32-21 exhibits resistance to oxidation and hot corrosion at high temperatures, making it ideal for use in equipment such as high-temperature heat exchangers, high-temperature furnaces, and high-temperature pipelines.

X8CrNiAlTi32-21Process performance：

Welding process: HuaNickel X8CrNiAlTi32-21 is suitable for a variety of traditional welding processes, such as tungsten inert gas welding, plasma argon arc welding, etc., but it must be welded in an annealed state, and it needs to be cleaned of stains, dust and various traces to ensure welding quality.

Heat Treatment Process: X8CrNiAlTi32-21 can be heat treated by annealing, but it will not harden due to heat treatment. This heat treatment is usually carried out at high temperatures to improve its mechanical properties and plasticity.

Cold working process: The X8CrNiAlTi32-21 can also be cold worked with standard tools, which is very important for the production of precision parts.

Relevant standards：

ASTM B409 / UNS N08800 , UNS N08810 , UNS N08811 、ASME SB409 / UNS N08800 , UNS N08810 , UNS N08811 、SAE AMS 5871 、JIS G4902 / NCF800 , 800H