UNS N07718

HuaNickel UNS N07718 alloy is a nickel-based superalloy strengthened by the γ of the body-centered quadripartite and the γ′ phase of the face-centered cube, which has good comprehensive properties in the temperature range of -253~700 °C, and the yield strength below 650 °C ranks first among the deformed superalloys, and has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, as well as good processing performance, welding performance and long-term microstructure stability, and can manufacture various complex shape parts, in the aerospace, nuclear energy, petroleum industry, It is used in a wide range of temperatures.

UNS N07718Chemical composition：

	C	Mn	Si	P	S	Cu	B	Co	Mg	Cr	Ni	Mo	Ti	Al	Nb	Fe
Min	≤									17	50	2.8	0.65	0.2	4.75	Bal
Max	0.08	0.35	0.015	0.35	0.015	0.3	0.006	1	0.1	21	55	3.3	1.15	0.8	5.5

UNS N07718Physical properties：

Densityg/cm3	8.24
Melting point℃	1260-1336

UNS N07718Mechanical properties：

Condition	Diameter	Tensile strength	Yield strength 0.2% offset		Elongation %	Hardness
			Min	Max		Min	Max
Cold working, solution annealing and aging	0.5-3	150	120	140	40	30	40
Annealing and aging of thermal working solutions	0.5-8	150	120	140	40	30	40
Annealing and aging of thermal working solutions	8-10	150	120	140	40	30	40

UNS N07718Alloy properties：

Corrosion resistance: HuaNickel UNS N07718alloy has excellent corrosion resistance to many media. These resistances are similar to those of other nickel-based alloys and are determined by their composition. In addition to being present in a strong oxidizing environment, nickel contributes to the corrosion resistance of many inorganic, organic and mixed acids and bases over a wide pH range. Nickel is also useful for preventing chloride stress corrosion cracking. Chromium gives the alloy the ability to withstand oxidizing media and sulfide attack. Molybdenum is widely recognized for its contribution to pitting resistance in many media.

High Temperature Strength: HuaNickel UNS N07718alloy retains high strength and good corrosion resistance in temperatures ranging from 700°C to 2500°F

UNS N07718Uses of alloys：

It is widely used in aerospace, petrochemical, electric power and other fields, especially in the occasions that require high temperature, high pressure and corrosive environments.

UNS N07718Process performance：

Welding Performance: HuaNickel UNS N07718is capable of welding using the Tigon Arc Welding (TIG) process using UNS N07718wire. The slow response of the 718 to age hardening allows the component to be welded and then aged hardened without any intermediate stress relief.

Heat treatment:

(1) Solution annealing at 1700-1850°F followed by rapid cooling (usually with water), plus precipitation hardening at 1325°F for 8 hours, furnace cooling to 1150°F, total aging time at 1150°F to 18 hours and then air cooling.

(2) Solution annealing at 1900-1950°F followed by rapid cooling (usually in water), plus precipitation hardening at 1400°F for 10 hours, air cooling to 1200°F and holding to a total aging time of 20 hours then air cooling.

Relevant standards：

rods, slats, wire rods and forgings – ASTM B 637, ASME SB 637, SAE AMS 5662, SAE AMS 5663, SAE AMS 5664,

SAE AMS 5832, SAE AMS 5914, SAE AMS 5962, ASME Code Case 1993, ASME Code Case 2206, ASME Code

Case 2222, AECMA PrEN 2404, AECMA PrEN 2405, AECMA PrEN 2952, AECMA PrEN 2961, AECMA PrEN 3219, AECMA PrEN 3666, ISO 9723, ISO 9724, ISO 9725, DIN 17752-17754。

Hot plates, cold plates, and strips – ASTM B 670, ASTM B 906, ASME SB 670, ASME SB 906, SAE AMS 5596, SAE AMS 5597, SAE AMS 5950, AECMA PrEN 2407, AECMA PrEN 2408, ISO 6208, DIN 17750

Conveyor pipes and tubes – SAE AMS 5589, SAE AMS 5590, ASME Code Case N-253, DIN 17751

Welding products – INCONEL Filler Metal 718 – AWS 5.14 / ERNiFeCr-2

other – ASME Code Case N-62, ASME Code Case N- 208, DIN 17744