Alloy 31Н8Х

Designation

Name The value
Designation GOST Cyrillic 31Н8Х
Designation GOST Latin 31H8X
Transliteration 31N8H
By chemical elements 31Ni8Cr

Description

Alloy 31Н8Х used: for the production of strips and sheets cold-rolled, forged bars, used in the manufacture of magnetic shunts, parts, temperature relay and sensor heating.

Standards

Name Code Standards
Classification, nomenclature and General rules В30 TU 14-1-4478-88

Chemical composition

Standard C S Mn Cr Si Ni Fe Cu Al Ca Mg
TU 14-1-4478-88 ≤0.05 ≤0.02 0.2-0.4 7.4-8.2 ≤0.18 30.5-31.8 Rest ≤0.05 ≤0.05 ≤0.025 ≤0.05
Fe is the basis.

Technological properties

Name The value
Features of heat treatment Recommended heat treatment after the fabrication of parts or specimens for magnetic tests: annealing in vacuum not worse than 10-3 mm of mercury.St. at a temperature of 900 °C with exposure for 2 hours, cooled to 600-650 °C with a speed of 80-120 °C/hour, up to 300-350 °C, at a speed of 30-70 °C/hour, up to 100-150 °C with the switched off oven, then in air.