Alloy ХН58КВТЮМБЛ (ЧС70; СН25)

Designation

Name The value
Designation GOST Cyrillic ХН58КВТЮМБЛ
Designation GOST Latin XH58KBTJuMBL
Transliteration HN58KVTYuMBL
By chemical elements CrNi58CoВTeAlCuBe
Name The value
Designation GOST Cyrillic ЧС70
Designation GOST Latin ChC70
Transliteration ChS70
By chemical elements ЧPb70
Name The value
Designation GOST Cyrillic СН25
Designation GOST Latin CH25
Transliteration SN25
By chemical elements PbNi25

Description

Alloy ХН58КВТЮМБЛ used: for manufacturing by investment casting and vacuum parts with enhanced long durability and heat resistant up to +900 °C, oxidation resistance at elevated temperatures (turbine blades, ground-based CCD).

Note

Casting heat-resistant Nickel-based alloy.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-3658-83

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N As Al B Ti Mo Sb Pb Bi Nb W Zr Co Y
TU 14-1-3658-83 0.06-0.12 ≤0.008 ≤0.008 ≤0.3 15-16.7 ≤0.3 Rest ≤0.5 ≤0.07 ≤0.01 ≤0.0005 2.4-3.2 ≤0.2 4.2-5 1.5-2.5 ≤0.0005 ≤0.001 ≤5.0E-5 0.1-0.3 4.5-6 ≤0.05 10-11.5 ≤0.05
Ni is the basis.

Technological properties

Name The value
Microstructure Strengthening phase of the alloy (γ phase) is practically composed of Ni (Al, Ti), as the alloy contains aluminum and titanium in a ratio close to 1: 1. The phase content of Ni (Nb), giving the alloy a higher stability and resistance to softening at high temperatures (over 900 °C), minimum.
Corrosion resistance The alloy has high resistance to sulfide corrosion. At temperatures above 900 °C, for gas turbine units operating on natural gas in the conditions of aggressive sulfide environment and the contact pressure, there is a significant wear of band flanges of GTE blades due to fretting corrosion.