Steel 03Н17К10В10МТ (ЭП836)

Designation

Name The value
Designation GOST Cyrillic 03Н17К10В10МТ
Designation GOST Latin 03H17K10B10MT
Transliteration 03N17K10V10MT
By chemical elements 03Н17Co10W10MoTi
Name The value
Designation GOST Cyrillic ЭП836
Designation GOST Latin EP836
Transliteration EhP836
By chemical elements -

Description

03Н17К10В10МТ steel is used: for the manufacture of a tube blank; seamless pipes; parts special machinery; equipment and parts oil and gas, chemical and aerospace industries.

Note

Partenitskaya corrosion resistant high-temperature steel.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 14-1-4477-88
Bars and shapes В32 TU 14-1-4862-90, TU 14-1-2199-77

Chemical composition

Standard C S P Mn Cr Si Ni Fe N Al Ti Mo W Co
TU 14-1-4862-90 ≤0.03 ≤0.01 ≤0.01 ≤0.1 ≤0.5 ≤0.15 16-17.2 Rest ≤0.005 ≤0.2 0.65-0.85 0.9-1.5 9-10.5 9.5-11
TU 14-1-2199-77 ≤0.03 ≤0.01 ≤0.01 ≤0.1 ≤0.3 ≤0.1 16-17 Rest - ≤0.15 0.6-1 0.8-1.2 9.5-10.5 9.5-11
Fe is the basis.
According to TU 14-1-2199-77, the chemical composition is given for steel grade 03N17K10V10MT-VD (EP836-VD).
According to TU 14-1-4477-88 and TU 14-1-4862-90 the chemical composition is given for steel grade 03Н17К10В10МТ-ПД (ЭП836-ПД). The nitrogen content is indicated after vacuum-arc remelting. Deviations from the specified standards of chemical composition are allowed: by nickel +0.30%, by titanium ± 0.050%, by nitrogen + 0.5050% in the initial metal of the plasma smelting, by silicon and manganese, provided that their sum is not more than 0.250% , sulfur and phosphorus, provided that their amount will not be more than 0.020%. Steel is introduced at 0.030% by the calculation of ferrosilicon or metal lanthanum and chemical analysis in the finished steel is not determined.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Bars on the other 14-1-4862-90. The longitudinal samples. Aging at 470-520 °C (exposure 1-4 hours), air cooling
≥2110 - - ≥45 ≥343
≥2110 - - ≥45 ≥343
≥2060 - - ≥45 ≥294
Bars aged in the state of delivery on the other 14-1-2199-77
≥2100 ≥2200 ≥6 ≥45 ≥290
Tubular billet on the other 14-1-4477-88. The aged at 470-510 °C (extract 3 hours, allowed 1, 2 and 4 hours), air cooling (samples with allowance for grinding, to determine the impact toughness samples of the groove type U)
≥1960 - - ≥35 ≥290

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
KCU Toughness

Technological properties

Name The value
Macrostructure and pollution The macrostructure of the metal should not have any traces of shrinkage, podnasadochnogo looseness, bubbles, cracks, foreign non-metallic inclusions, crusts, delamination, visible without using the magnifying devices. Norms of permissible defects of the macrostructure is the Central porosity, point heterogeneity, total and marginal spotting, segregation and exudation square should not exceed the first score according to GOST 10243; layer-by-layer crystallization and light rejection circuit characteristics are not. The contamination of steel billets, non-metallic inclusions should be no more than 1.5 points for each type of non-metallic inclusions according to GOST 1778. Allowed attacks for each type of inclusions up to 2.5 points on two sections of six. In the presence of osamdesetih inclusions of nitrides and carbonitrides, which are not corresponding in size with poliatlonu method "h" according to GOST 1778, contamination became such inclusions shall not exceed the maximum permissible poliatlonu (Annex 2). Billets are 100% ultrasonic control.