Alloy Х25Н20 (ЭП74)

Designation

Name The value
Designation GOST Cyrillic Х25Н20
Designation GOST Latin X25H20
Transliteration H25N20
By chemical elements Cr25Ni20
Name The value
Designation GOST Cyrillic ЭП74
Designation GOST Latin EP74
Transliteration EhP74
By chemical elements -

Description

Alloy Х25Н20 used: for the manufacture of wire for industrial and laboratory furnaces, household appliances; elastic sensing elements, operating at temperatures up to 950 °C.

Standards

Name Code Standards
Tape В34 GOST 12766-67

Chemical composition

Standard C S P Mn Cr Si Ni Fe Ti Zr
GOST 12766-67 ≤0.15 ≤0.02 ≤0.03 ≤2 24-27 ≤1 17-20 Rest ≤0.3 ≤0.5
Fe is the basis.
According to GOST 12766-67 the chemical composition is given for the alloy grade X25N20. The presence in the alloy of residual rare-earth elements, as well as barium and calcium, is not a defective feature.

Physical characteristics

Temperature R, Mr. · m
20 830-960

A description of the physical symbols

Name Description
R UD. the resistivity

Technological properties

Name The value
Okalinolomatel, heat resistance Onlinetony alloy in an oxidizing atmosphere, hydrogen, vacuum; unstable in an atmosphere containing sulfur and sulfur compounds; more heat resistant than khro-melaminovye alloys.
Operating temperature The working temperature of heating element: Optimal 900 °C, maximum 1000 °C.