NiCr21Mo

HuaNickel NiCr21Mo is a corrosion-resistant alloy Ni-Fe-Cr-Mo-Cu stabilized with titanium. This alloy has good comprehensive corrosion resistance and local corrosion resistance and good process properties, so it has been widely used in chemical, energy, petrochemical and hydrometallurgical industries.

NiCr21MoChemical composition：

	Fe	Ni	Mo	Cu	Cr	C	Si	Mn	P	S
Min	Bal	38	2.5	1.5	19.5	≤
Max		46	3.5	3.5	23.5	0.05	0.5	1	0.04	0.03

NiCr21MoPhysical properties：

Density/g·cm³	Melting point/℃	Coefficient of linear expansion/(10⁶ ·℃)-1		Thermalconductivity/W·(m·℃)-1		Resistivity/μΩ ·m	Elastic modulusE/MPa×10³
		20~100℃	20~300℃	25℃	150℃	20℃
8.14	1350	12.6	14.7	12.3	14.4	1.12	195

NiCr21MoMechanical properties：

The state of heat treatment of the material	Mechanical properties
	σb/MPa	σp0.2/MPa	&;/%	ψ/%%
Solution annealed tubes	608～647	264～323	44～53	——

NiCr21MoAlloy properties：

The alloy has a pure austenite structure under solution conditions. However, at medium aging, carbides and intermetallic compounds can precipitate on austenite matrices and intergranular bodies, and these precipitated phases can impair the mechanical properties and corrosion resistance of the alloy.

NiCr21MoUses of alloys：

Due to its wide range of corrosion resistance, this alloy is widely used in the chemical processing industry, hot seawater, and hydrometallurgical plants. It is mainly used to treat heat exchangers, pipes, valves, pumps, etc. in hot sulfuric acid, chloride-containing solution, sulfurous acid and other environments. It is also widely used in the field of wood pulp leachers and deep-source gas wells in the paper industry.

NiCr21MoProcess performance：

Welding process: The usual welding method can be used, and nickel-based welding wire (00Cr22Ni61Mo9Nb) is recommended.

Heat Treatment: A suitable final heat treatment for this alloy is 940°C stable. The intermediate annealing temperature should be higher than 1050°C.

Relevant standards：

ASTM B 425，ASTM B 564，ASME SB 425，ASME SB 564，ASTM B 424, ASTM B 906, ASME SB 424, ASME SB 906, DIN 17750,, ISO 6208、ASTM B 163, ASTM B 423, ASTM B 704, ASTM B 705, ASTM B 751, ASTM B 775, ASTM B 829, ASME SB 163, ASME SB 423, ASME SB 704, ASME SB 705, ASME SB 751, ASME SB 775, ASME SB 829,ASTM B 366, ASME SB 366, DIN 17744