UNS N06690 (Inconel 690)

UNS N06690/Inconel 690

Material grades and equivalents Inconel 690 / UNS N06690 / W. Nr. 2.4642

UNS N06690 (Inconel 690/ W. Nr. 2.4642) is a high-chromium nickel alloy having excellent resistance to many corrosive aqueous media and hightemperature atmospheres. In addition to its corrosion resistance, alloy 690 has high strength, good metallurgical stability, and favorable fabrication characteristicsThe substantial chromium content gives the alloy outstanding resistance to oxidizing chemicals and to high-temperature oxidizing gases. The high level of nickel imparts resistance to stresscorrosion cracking in chloride-containing environments as well as to sodium hydroxide solutions. The properties of INCONEL alloy 690 are useful for various applications involving nitric or nitric/hydrofluoric acid solutions. Examples are tail-gas reheaters used in nitric acid production and heating coils and tanks for nitric/hydrofluoric solutions used in pickling of stainless steels and reprocessing of nuclear fuels. The alloy’s resistance to sulfur-containing gases makes it an attractive material for such applications as coal-gasification units, burners and ducts for processing sulfuric acid, furnaces for petrochemical processing, recuperators, incinerators, and glass vitrification equipment for radioactive waste disposal. In various types of high-temperature water, alloy 690 displays low corrosion rates and excellent resistance to stress-corrosion cracking. Thus, alloy 690 is widely used for steam generator tubes, baffles, tubesheets, and hardware in nuclear power generation.

Inconel 690 Chemical composition:

% Main Chemical Composition %
Ni	Cr	Fe	Cu	C	Si	Mn	S
Rest	27.0～31.0	7.0～11.0	≤0.05	≤0.05	≤0.5	≤0.5	≤0.015

 

Inconel  690 Physical properties：

Density	Melting range	Hardness
8.73	1338～1380	HRC36

 

Inconel  690 Alloy minimum mechanical properties in the room temperature:

Condition	Tensile StrengthRm N/mm²	Yield strengthR P 0. 2N/mm²	Elongation
			A 5 %
Solution	690～738	334～372	44～50

 

Inconel  690 Characteristic as below:

Inconel 690 alloy is a kind of nickel based wrought super alloy which has excellent resistance to many aqueous medium and ability of high temperature atmosphere erosion. It also has high strength , good stability and excellent characteristics for metallurgical processing.

Specifications：

Rod, Bar, Wire andForging Stock	ASTM B166; ASME SB 166, ASTM B 564; ASME SB 564, ASMECode Case N-525, ISO 9723, MIL-DTL-24801
Seamless Pipe and Tube	ASTM B 163; ASME SB 163, ASTM B 167; ASME SB 167, ASTM B 829; ASME SB 829, ASME Code Cases 2083, N- 20, N-525, ISO6207, MIL- DTL-24803
Plate, Sheet, and Strip	ASTM B168; ASME SB 168; ASME N-525, ISO 6208,MIL-DTL-24802
Welding Products	INCONEL Filler Metal 52 – AWS A5.14 / ERNiCrFe-7; INCONELWelding Electrode 152 – AWS A5.11 / ENiCrFe-7