Steel 10Х15Н9С3Б1 (ЭП302)

Designation

Name The value
Designation GOST Cyrillic 10Х15Н9С3Б1
Designation GOST Latin 10X15H9C3B1
Transliteration 10H15N9S3B1
By chemical elements 10Cr15Н9С3Nb1
Name The value
Designation GOST Cyrillic ЭП302
Designation GOST Latin EP302
Transliteration EhP302
By chemical elements -

Description

10Х15Н9С3Б1 steel is used: for the production of forgings, free forging manufactured, semi rental (sheets, rods, ribbons), pipe blanks, pipes and forgings for the manufacture of parts and assemblies of power plant equipment (parts and units of steam generators in power machinery and corrosion resistant to work in a steam environment and corrosion in liquid Pb and Pb-Bi cooling). Maximum operating temperature of 550 °C.

Note

Silicon-containing austenitic steel.

Standards

Name Code Standards
Thermal and thermochemical treatment of metals В04 ST ЦКБА 016-2005
Bars and shapes В32 TU 14-1-1902-76, TU 14-1-3154-81
Tape В34 TU 14-1-1980-77
Blanks. Of the workpiece. Slabs В31 TU 14-1-2052-77, TU 14-1-1174-75
Sheets and strips В33 TU 14-1-2853-79
Steel pipes and fittings to them В62 TU 14-3-211-74, TU 14-3-287-74

Chemical composition

Standard C S P Mn Cr Si Ni Fe Nb
TU 14-1-2853-79 0.08-0.12 ≤0.015 ≤0.02 0.4-0.8 14-16 2.2-3 8-10 Rest 0.7-1
Fe is the basis.
According to TU 14-1-2853-79, the chemical composition is given for steel grade 10Х15Н9С3Б1.
According to TU 14-1-2052-77, the chemical composition is given for steel grade 10Х15Н9С3Б1-Ш (ЭП302-Ш). Deviations from the chemical composition are permissible: for silicon +0.10%, for niobium -0.10%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
Procurement of parts of pipeline fittings from steel 10Х15Н9С3Б1-W at ST CKBA 016-2005: Hardening in air, 1030-1050 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
≤60 ≥245 ≥588 ≥25 ≥981
Forgings on the other 14-1-2052-77. Heating to 1050±50 °C, air cooling
≥245 ≥588 ≥25 ≥981
≥147 ≥392 ≥25 -

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
KCU Toughness

Technological properties

Name The value
Weldability To improve the overall corrosion resistance relieve residual stresses in welded assemblies used annealing welded assemblies in air, 1000-1100 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour).
Macrostructure and pollution The macrostructure of the steel on the other 14-1-2052-77 must be without voids, cracks, cracks and slag inclusions. Norms of permissible defects - Central porosity ≤ 1 point; - point nonuniformity ≤ 1 score; - square of exudation ≤ 1 points. Valid pollution steel non-metallic inclusions: oxides of stroke OS ≤ 1 point; - point oxides OF ≤ 1 point; - silicates fragile CX ≤ 1.5 points; silicates plastic SP ≤ 1.5 points; silicates plastic SP ≤ 2 points; - silicates, non-deformed SN ≤ 2 points; - sulphides With ≤ 1 point. Tests are performed on the nitrides and carbonitrides on the scale of the nitrides of titanium; actual results recorded in the certificate.
Microstructure On the other 14-1-2052-77 the content of the ferritic phase is determined in the initial smelting of cast sample and allowed in the amount of 2-5 %. Ferritic phase is determined from the cast of the last two samples taken prior to release of metal. The divergence in content of the ferritic phase between samples should not exceed 1.0 %.
Particularities of production of goods Forgings on the other 14-1-2052-77 are supplied without heat treatment, but stripped and cleaned. Forgings type of washers, designed for subsequent cold processing should have of forging not less than 4, and the forged type rods not less than 3. For forgings intended for further hot working the forging is not specified.
Corrosion resistance Steel shall pass the test for resistance to ICC. testing is performed in a solution containing 160g. copper sulfate according to GOST 4165, 100 ml. of sulfuric acid density of 1,835 g/cm3 according to GOST 4204 and 1000 ml. of water.