Hastelloy C-4

HuaNickel Hastelloy C-4 superalloy is a metal material with iron, nickel and cobalt as the main components, which can work for a long time at high temperatures above 600°C and certain stress. It has high high temperature strength, good oxidation and corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties. Superalloys are single austenitic structures with good structural stability and reliability at various temperatures. Based on the above properties and high alloying degree, superalloys are also known as “superalloys” and are widely used in aviation, aerospace, petroleum, chemical industry, shipbuilding and other fields. According to the matrix elements, superalloys can be divided into iron-based, nickel-based, and cobalt-based superalloys.

Hastelloy C-4 Chemical composition：

	Ni	Cr	Mo	C	Si	Mn	P	S	Fe	Ti	Co
Min	Bal	14	14	≤
Max		18	17	0.015	0.08	1	0.04	0.03	3	0.7	2

Hastelloy C-4 Physical properties：

Density(20℃)	Melting point/℃		Resistivity/ μΩ·m(23℃		Linear expansion coefficient/×10-6m·(m·K)-1
					29～93℃		20～204℃		20～316℃	20～427℃	24～538℃		24～649℃
8.64	——		1.248		10.8		11.9		12.6	13.0	13.0		13.5
Thermal conductivity/W·(m·K)-1								Specific heat capacity/J·(kg·K)-1100℃			Elastic modulus/MPa
23℃	100℃	200℃		3007		400℃					room temperature	204℃		316℃
10.0	11.4	13.2		14.9		16.6		427			205000	195000		188000

Hastelloy C-4 Mechanical properties：

Sheet thickness/mm	Trial status	Test temperature/℃	σb/MPa	σp0.2/MPa	δ/%	hardness(HB)
1.6	1066℃Solid solution	room temperature 204 316 427	777.58 705.57 674.53 652.40	416.56 402.96 376.65 319.69	52 49 52 64	90
3.1	1066℃Solid solution	room temperature 204 316 427 538 649 760	800.62 677.18 671.77 643.5 643.7 570.50 475.41	420,29 319.70 302.47 302.47 302.40 290.70 259.75	54 54 59 62 55 50 44	92
3.9	1066℃Solid solution	room temperature204 316 427	782.0 688.30 649.70 655.22	365.17 274.90 248.72 249.4	55 55 61 68	91

Hastelloy C-4 Alloy properties：

HuaNickel Hastelloy C-4 alloy exhibits excellent stability at 650-104D°C, improving resistance to intergranular abrasion, avoiding edge erosion, hoe induction, and corrosion in the weld hot scene under proper manufacturing conditions.

Hastelloy C-4 Uses of alloys：

It is mainly used for resistance to inorganic acids such as hydrochloric acid and sulfuric acid, organic acids such as formic acid, chlorine resistance and chlorine-containing media, dry chlorine, seawater, etc. Due to the good resistance of this alloy to intergranular corrosion, pitting corrosion and crevice corrosion, it is often used for local corrosion problems that cannot be solved by other stainless steels and some high-nickel corrosion-resistant alloys. This alloy can be used to make corrosion-resistant pipes, vessels, columns, tanks, reactors, heat exchangers, pumps, valves, etc.

Hastelloy C-4 Process performance：

Welding process:HuaNickel Hastelloy C-4 alloy is more suitable for use in the chemical industry and other industries in the welded state compared to the two Ni-Cr-Mo corrosion resistant alloys mentioned above. HuaNickel Hastelloy C-4 alloy can be welded without any difficulty using common welding methods such as TIG, MIG, manual arc welding, etc. When submerged arc welding is used, care should be taken to prevent overheating, and carbon or silicon is not allowed in the solvent. Acetylene welding is not recommended forHuaNickel  Hastelloy C-4 alloys for corrosion-resistant applications.

Heat Treatment: Except as otherwise specified, HuaNickel Hastelloy C-4 alloy is solution treated. This is the only way to make this alloy have the best corrosion resistance and the highest plasticity. The solution treatment temperature is 1040°C and then quenching.

Relevant standards：

ASTM B574、ASTM B336、ASTM B575、ASTM B622、ASTM B619、ASTM B626