Haynes 242

HuaNickelHaynes 242 nickel-based alloy is a nickel-based superalloy composed of nickel, molybdenum, chromium, cobalt and other elements, with a nickel content of about 60%. Haynes 242 nickel-based alloy, also known as age-hardening alloy, still has good strength at 705°C (1300°F). It has a low rate of thermal expansion, good oxidation resistance at up to 815°C, and good processability. Excellent resistance to high-temperature fluorine environments. Used in gas turbine seals, control structures and high-temperature fasteners. It is also used in the production of fluoropolymer plastics, chemical and petrochemical applications.

Haynes 242 Chemical composition：

	Mo	Cr	Mn	Si	Ni	Fe	Co	AI	C	B	Cu
Min	24	7	–	–	–	≤
Max	28	9	0.8	0.8	65	2	2.5	0.5	0.03	0.006	0.5

Haynes 242 Physical properties：

Density/g·cm-3	Coefficient of linear expansion/m(m·℃)-1			Thermal conductivity/W·(m·K)-1			Specific heat capacity/J·(kg·K)-1			Resistivity/μΩ ·cm
	25~100	25~200	25~300	room temperature	100℃	300℃	Indoor temperature	100℃	300℃	Indoor temperature	100℃	300℃
9.05	10.8	11.3	11.6	11.4	12.6	15.9	386	405	431	122	123	126.7

Haynes 242 Mechanical properties：

Trial status	Test temperature/℃	σb/MPa	σp0.2/MPa	δ/%
Solid	room temperature	950	450	47
Solid solution +20% cold working	room temperature	1170	960	20
Solid solution +40% cold work	room temperature	1500	1250	8
Solution + aging	room temperature	1325	895
Solid solution + 20% cold working + aging	room temperature	1445	1195	21
Solid solution +40% cold working ten aging	room temperature	1685	1515	11
Solid solution +40% cold working ten aging	595	1390	1320	11
Solution + 40% cold working + aging	650	1370	1005	8
Solid solution +40% cold working ten aging	705	1265	925	11
Solution + 40% cold working + aging	760	1075	650	32

Haynes 242 Alloy properties：

Compared with the aforementioned 00Mo24Ni60Cr8Fe6 (Hastelloy B10) alloy, this alloy not only has a low iron content, but also contains other elements other than nickel, molybdenum, and chromium such as cobalt.

Oxidation resistance: HuaNickelHaynes 242 alloy has good oxidation resistance at ≤ 815°C, so it can be used continuously or

No surface protection is required under intermittent operating conditions.

Haynes 242 Uses of alloys：

Haynes 242 (Haynes242) alloy is used as a high-temperature (heat-resistant) alloy, which can be used in the aerospace industry after solution + aging treatment, and if it is used as a corrosion-resistant alloy, it is in a solid solution treated state, and its use is basically similar to the above-mentioned 00Mo24Ni60Cr8Fe6 (Hastelloy B10) alloy. It can be used in environments that are resistant to hydrofluoric acid and fluoride molten salts. Due to the high strength of this alloy, it has been used with good results in fluoride corrosion-resistant parts and components that require high strength.

Haynes 242 Process performance：

Welding process: Haynes 242 alloy has good welding properties, the alloy can be welded in a solution state by GTAW and GMAW processes, it is recommended to use a chemically matched wire.

Heat treatment: Haynes 242 alloy is subjected to final heat treatment. The heat treatment process is 925~1120°C heating and insulation, and then air cooling or water cooling (large cross-sectional size). The aging temperature of the alloy after solution treatment is 650 °C× and it is 24~48h after heat preservation and air cooling.

Relevant standards：

SB 434/B 434、SB 573/B 573 、B 472、SB 622/B 622 、SB 619/B 619 、SB 626/B 626 、SB 366/B 366 SB 564/B 564