Alloy 03Х20Н45М4БЧ (ЧС42)

Designation

Name The value
Designation GOST Cyrillic 03Х20Н45М4БЧ
Designation GOST Latin 03X20H45M4BCh
Transliteration 03H20N45M4BCh
By chemical elements 03Cr20Ni45Cu4BeЧ
Name The value
Designation GOST Cyrillic ЧС42
Designation GOST Latin ChC42
Transliteration ChS42
By chemical elements ЧPb42

Description

Alloy 03Х20Н45М4БЧ used: for the production of forged billets used for the manufacture of extremely thin-walled pipes of high precision; parts of shells of fuel elements for transport and stationary nuclear power plants.

Note

The alloy austenitic. The alloy has a greater resistance to low-temperature radiation embrittlement, radiation swelling, radiation creep, corrosion damage in comparison with steel 03KH16N15M3B.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 14-1-1903-77
Bars and shapes В32 TU 14-1-2712-79, TU 14-1-2916-80

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Al Ti Mo Nb Y
TU 14-1-2916-80 0.015-0.025 ≤0.01 ≤0.015 ≤0.8 19-20.5 ≤0.8 44-46 Rest ≤0.15 ≤0.02 ≤0.2 ≤0.1 3.3-4.3 0.75-0.95 0.02-0.06
Ni is the basis.
According to TU 14-1-2916-80 the chemical composition is given for the alloy 03Х20Н45М4БЧ-ВИ (ЧС42-ВИ).
According to TU 14-1-1903-77 the chemical composition is given for the alloy 03Х20Н45М4БЧ-ВИ (ЧС42-ВИ). The tolerance for the mass fraction of carbon is set to -0.0050%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Tubular billet on the other 14-1-1903-77. Austenization at 1050 °C (aging for 1 h), air cooling (longitudinal samples, cut from a square sample of 90 mm)
20-25 ≥175 ≥540 ≥40 ≥65
20-25 ≥147 ≥440 ≥38 ≥65

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing

Technological properties

Name The value
Macrostructure and pollution On the other 14-1-1903-77 macrostructure of the alloy on the cross etched templeto should not be visible to the naked eye: podnasadochnogo looseness, cracks, slag inclusions, crusts, delamination and subcortical bubbles. The Central porosity, point heterogeneity (total porosity) and segregated square in the delivered profile should not exceed 1 score. On the outer surface of a tube blank as supplied must not be cracked, shells, shells, sunsets (zakonov), wooloowin, pesochin, delaminations, inclusions, visible without using the magnifying devices. Contamination of metal non-metallic inclusions is evaluated by the maximum score should be: - stroke OS oxides ≤ 1.0 points; a point FROM oxides ≤ 1.0 points; - silicates fragile CX ≤ 1.0 points; - silicates plastic SP ≤ 1.0 points; - silicates, non-deformed SN ≤ 1.0 points; sulfide ≤ 1.0 points; - carbonitrides, nitrides, NS, NT ≤ 3.0 points.
Corrosion resistance Arbitration test susceptibility to intergranular attack produced by the method AM GOST 6032 (test duration 24 hours) with provotsiruet by heating at a temperature of 650 °C for 2 hours. The quenching temperature before precipitating heat of 1050 °C. the susceptibility to intercrystalline corrosion shall be tested three samples from a test ingot, batch - melting.