Inconel 718 High Temperature Alloy - China

Inconel718 (UNS NO7718) high-temperature alloy Features and applications

overview: This alloy has good comprehensive performance at the

temperature range of 253 to 700°C.

Its yield strength below 650°C is the

largest among high-temperature alloys.

Apart from good processing

properties and weldability, it has good performance in anti-fatigue, anti-

oxidation, anti radiation and corrosion resistance.

This alloy can be

used to made a variety of complex-shaped parts.

It has been used widely

in the aerospace, nuclear energy, oil industry and the extrusion die.

Inconel718's similar grades: GH4169

GH169(China), NC19FeNb(France), W.

Nr.

2.4668

NiCr19Fe19Nb5(Germany) Chemical composition, %: Nickel.

.

50-

55 Chromium.

.

17-21


Iron.

.

.

balance Molybdenum.

.

2.8-

3.3 Niobium.

.

4.75- 5.5

Cobalt.

.

1.0 max

Carbon.

.

0 .

08 max

Manganese.

.

0.35 max

Silicon.

.

.

0.35 max

Sulfur.

.

.

0.015 max

Copper.

.

.

0.3 max Aluminium.

.

0.2-

0.8 Titanium.

.

0.6 5-1.15 Physical

properties Density, g/cm3 .

8 - 24 Melting

Range, °C.

1260- 1320 Thermal conductivity,

λ/(W/m•°C), at 100°C .

14.7 Specific heat,

J/kg•°C.

.

435 Elastic modulus, GPa.

199.9 Shear

modulus, GPa.

77.2 Electrical resistivity,

μΩ•m.

.

1.15 Poisson's

ratio.

.

0.3 Coefficient of linear expansion,

a/10-6°C-1, at 20-100°C.

11 - 8

Mechanical properties: (the minimum value detected at room temperature)

Tensile strength, σb/MPa.

.

965

Yield strength, σp0.2/MPa.

5 50

Elongation, σ5 /%.

.

30

Brinell Hardness, HBS.

.

≥363

The way of heat treatment is solution treatment

Available products and specifications:

Bar: ASTM B637, AMS 5662, AMS 5663, AMS 5664, ASME SB637

Forging: ASTM B637, AMS 5662, AMS 5663, AMS 5664, ASME SB637

Plate/Strip: ASTM B670, ASTM B906, AMS 5596, AMS 5597

Wire: AMS 5832

Pipe: AMS 5589, AMS5590

The metallurgical structure of Inconel718:

The structure of the alloy in the state of standard heat-treatment consists of γ matrixγ', γ', δ, NbC phase.

The process performance and requirements of Inconel718:

Due to a higher content of niobium in the Inconel alloy 718, the niobium segregation of the alloy is directly related to the metallurgical processes.

In order to avoid segregation in the ingot is too much, the ingot diameter is not larger than 508mm.

After the homogenization treatment, the alloy has good hot workability.

The steel ingot blooming heating temperature does not exceed 1120°C.

The average size of the grain size of the alloy is closely related to the forging deformation degree and the final forging temperature.

The alloy is with satisfactory weldability.

Available methods are argon arc welding, electrode beam welding, seam welding, spot welding, and so on.

Different processes of solid solution treatment and aging treatment will produce alloys with different material properties.

Because of the lower diffusion rate of γ' phase, a long time of aging treatment will enable Inconel alloy718 to obtain the best mechanical properties.

Inconel 718 High Temperature Alloy

Please inquiry for your need now

Company Contact:

• Posted By: Shanghai Kangsheng Superalloy Co., Ltd

• Phone: 8602169925078

• Address: 1355#,Chengbei road, Jiading District, Shanghai, Shanghai , China

• Email:

• Business Description: involved in international trade import export of goods, products, and services