Alloy ХН70 (ЭИ442)

Designation

Name The value
Designation GOST Cyrillic ХН70
Designation GOST Latin XH70
Transliteration HN70
By chemical elements CrNi70
Name The value
Designation GOST Cyrillic ЭИ442
Designation GOST Latin EI442
Transliteration EhI442
By chemical elements -

Description

Alloy ХН70 used: for the manufacture of ribbons with thickness of 0.12 and 0.40 mm and a width of 380 and 400 mm used for parts of the pipeline systems operating under moderate stress conditions of very high temperatures (up to 1100−1200 °C) and other branches of engineering.

Note

Heat-resistant Nickel-based alloy.
The alloy is practically homogeneous structure of the solid solution after heat treatment (heating up to 1000−1200 °C With cooling in water or air).
Besides a sufficient manufacturability (prokativaet, stonemont, weldability) and high resistance to gas corrosion (okalinolomatel) alloy has good thermal fatigue resistance (thermal stability).

Standards

Name Code Standards
Tape В34 TU 14-1-2861-79

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al
TU 14-1-2861-79 ≤0.07 ≤0.02 ≤0.02 ≤0.5 28-31 ≤0.8 Rest ≤5 ≤0.15
Ni is the basis.
According to TU 14-1-2861-79 the content of residual elements is regulated in accordance with GOST 5632.

Mechanical properties

σU, MPa
The tape is heat-treated in the delivery condition (0.12 and 0.40 mm)
≥529

Description mechanical marks

Name Description
σU Limit short-term strength

Physical characteristics

Temperature R, Mr. · m
20 11

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity