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Hastelloy C4

Material:Alloy C-4, N06455, 2.4610

Hastelloy C4 is a nickel-based alloy, similar to other alloys such as UNS N06455 and DIN 2.4610. C4 exhibits excellent high-temperature stability, maintaining excellent stability and corrosion resistance even at temperatures ranging from 649°C to 1038°C. Its primary chemical composition is nickel, chromium, and molybdenum, and the industry considers it the most microstructurally stable of the Hastelloy alloys. The melting point of Hastelloy C4 alloy is 2435-2550°F. Furthermore, in the annealed state, the alloy exhibits excellent machinability, allowing for deep drawing, spinning, and stamping.

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Hastelloy C4 Introduction：

Hastelloy C4 is a high temperature, high strength, high corrosion resistance alloy material, also known as alloy C4. It is a solid solution strengthened nickel-based alloy with excellent corrosion resistance and high temperature stability, so it is widely used in chemical, petroleum, pharmaceutical and aerospace fields.

Hastelloy C4, namely UNS N06455, has excellent thermal stability. In corrosive environments, C4 has the same corrosion resistance as C276 alloy, but performs better in strong reducing and oxidizing properties.

Hastelloy C4 Composition
Hastelloy C4 is a versatile Ni-Cr-Mo alloy with extremely high resistance to corrosion.

Grade	C≤	Mn≤	P≤	S≤	Si≤	Ni	Cr	Mo	Fe≤	Co≤	Ti≤
Hastelloy C4	0.015	1.0	0.04	0.03	0.08	balance	14.0-18.0	14.0-17.0	3.0	2.0	0.7

Hastelloy C4 Mechanical Properties

Grade	Tensile, min, ksi[MPa]	Yield, min, ksi[MPa]	Elongation, %(min)
Hastelloy C4	100[690]	40[276]	40

Hastelloy C4 Physical Properties

Density: ρ=8.6g/cm³
Melting temperature: 1335～1380℃

Temperature ℃	Specific heat J/Kg*K	Thermal conductivity W/m*K	Resistivity μΩcm	Elastic modulus KN/mm²	Expansion coefficient 10^-6/K
0	406
20	408	10.1	124	211
93
100	426	11.4	125	207	10.9
200	448	13.2	126	202	11.9
204
300	465	15.0	127	195	12.5
316
400	477	16.7	128	188	12.9
427
500	490	18.4	129	181	13.2
538
600	502	20.5	132	175	13.6
649
700	512	22.6	135	168	14.0
760
800	522	24.8	138	158	14.5
871
900				149	15.1
982
1000				138	15.9

Hastelloy C4 Properties

High temperature stability: Hastelloy C4 alloy exhibits excellent stability in the high temperature range of 650-1040℃, which makes it an ideal material for many high temperature industrial applications.

Intergranular corrosion resistance: Through chemical composition control and heat treatment process, Hastelloy C4 alloy improves its resistance to intergranular corrosion and effectively avoids corrosion in harsh environments.

Weld heat affected zone corrosion resistance: Under proper manufacturing conditions, Hastelloy C-alloy can avoid the corrosion sensitivity of the weld heat affected zone, thereby ensuring the reliability and durability of the welded joint.

Good processing performance: Despite its high strength and hardness, C4 alloy still has good processing performance, including cold working and hot working, which makes it easy to be molded into various complex shapes and sizes.

Hastelloy C4 Equivalent Grades

STANDARD	WNR.	UNS	GB/T
Hastelloy C4	2.4610	N06455	NS335

Hastelloy C4 ASTM Standard

Product	Standard	Show
Pipe SMLS & Welded	ASTM B622/B619
Sheet / Plate	ASTM B574
Bar / Rod	ASTM B574
Forging / Flange	ASTM B366

Hastelloy C4 Application

chemical processing plant
expansion bellows
Nuclear power plants and processing
industrial equipment

Hastelloy C4 Standar and Specification

Hastelloy C4 production strictly complies with ASME and ASTM industry standards. For different product forms, there are corresponding production and material standard requirements:

Plate, Sheet, and Strip: ASME SB-575 / ASTM B575

Bar and Wire: ASTM B574.pdf