Favorite  |  Set Home
Inconel 690/ UNS N06690 Alloy- TJC STEEL.
 Inconel 690 is a kind of alloy mainly used for steam generator heat pipe material in pressurized water reactor nuclear power plant. It is the [TJC STEEL]core technology of steam generator.

 

Chemical Composition for Inconel 690 Alloy

Ni

Cr

Fe

C

Al

Ti

Mn

Si

Cu

P

S

Rest

30.39

8.88

0.023

0.22

0.26

0.23

0.07

0.02

0.006

0.002

 

Physical& Mechanical Property

Density

Melting

Young’s modulus

Poisson’s ratio

Yield strength

Tensile strength

Elongation

密度

熔点

杨氏模量

泊松比

屈服强度

抗拉强度

伸长率

8.19g/cm

1343-1377℃

211GPa

0.289

350MPa

700MPa

45%

 

Special Properties for Inconel 690 Alloy

The Inconel 690 alloy has excellent intercrystal corrosion resistance and intercrystal stress corrosion cracking resistance. It is mainly [TJC STEEL]used as the material of steam generator heat transfer pipe for PWR nuclear power plant.The heat transfer pipe material for PWR nuclear power plant steam generator has undergone a development process, including 304 austenitic stainless steel, 600 alloy, 800 alloy and 690 alloy.Studies on corrosion failure of 600 alloys in service show that intergranular corrosion and intergranular stress corrosion cracking are the main problems.As the material of steam generator heat pipe in PWR nuclear power plant, no damage has been reported since the 690 alloy was put into use in 1990s.

 

Main applications for Inconel 690 Alloy

Of the pressurized water reactor (PWR) nuclear power plants in China, only Qinshan Phase I uses 800 alloy, and The Qinshan Phase II, Daya Bay and [TJC STEEL]Lingao nuclear power plants all use 690 alloy as the steam generator heat transfer pipe material.Most of the pressurized water reactor nuclear power plants under construction and planning also adopt 690 alloy as the material of steam generator heat transfer pipe.