Steel 13Х13С2М2 (ЭИ852)

Designation

Name	The value
Designation GOST Cyrillic	13Х13С2М2
Designation GOST Latin	13X13C2M2
Transliteration	13H13S2M2
By chemical elements	13Cr13С2Mo2

Name	The value
Designation GOST Cyrillic	ЭИ852
Designation GOST Latin	EI852
Transliteration	EhI852
By chemical elements	-

Description

13Х13С2М2 steel is used: for the manufacture of bars; billets; and electropolishing extremely thin-walled pipes used in the manufacture of parts and equipment for the chemical, energy and nuclear engineering.

Note

Steel of ferrite-martensitic type.

Standards

Name	Code	Standards
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1401-75, TU 14-1-1992-76
Bars and shapes	В32	TU 14-1-1889-76
Steel pipes and fittings to them	В62	TU 14-3-1179-83, TU 14-3-258-74, TU 14-3-791-78, TU 14-3-882-79

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Mo
TU 14-1-1401-75	0.1-0.15	≤0.02	≤0.03	≤0.6	12-14	1.4-2.1	≤0.3	Rest	1.2-2
TU 14-1-1992-76	0.1-0.15	≤0.015	≤0.02	≤0.6	12-14	1.4-2.1	≤0.3	Rest	1.2-2

Fe is the basis.
According to TU 14-1-1401-75, the chemical composition is presented for steel grade 13X13M2S2 (EI852).
According to TU 14-1-1992-76 the chemical composition is presented for steel grade 13Х13М2С2-Ш (ЭИ852-Ш). The deviation in nickel is +0.10%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Tubular billet on the other 14-1-1401-75 the 14-1-1992-76. Quenching in water from 1050-1070 °C + Vacation at 720-740 °C (aging of 1.0-1.5 h), air cooling
20-25	≥255	≥539	≥20	≥56
20-25	-	≥323	≥15	≥50
20-25	-	≥638	≥20	-
20-25	≥167	≥196	≥25	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing

Technological properties

Name	The value
Pressure treatment	Clan of the workpiece on the other 14-1-1992-76 determined by the ratio of the average cross section of the ingot to the billet must be at least 4.5 for ø 90-100 mm and not less than 3.0 to ø 105-110 mm.
Macrostructure and pollution	The macrostructure of the steel on the other 14-1-1401-75 when checking for cross etched templeto should not have shrinkage looseness, cracks, bubbles, turns brown, inclusions and delaminations visible to the naked eye. Quality assessment of macrostructure is scored and must be: - on a point inhomogeneity ≤ 1.5 points; - the Central porosity ≤ 1.5 points; - phase separation in the square ≤ 2.0 points. Contamination of metal non-metallic inclusions should be (on the average score/maximum score): - sulphides With ≤ 2,0/3,0; - silicates SP ≤ 3,0/4,0; - silicates CX ≤ 3,0/5,0; - silicates SN ≤ 3,0/4,0; - oxides (OS, OT) ≤ 3,0/5,0. The macrostructure of the steel on the other 14-1-1992-76 in the delivery condition must have no cracks, gas bubbles, traces of shrinkage, inclusions and delaminations are visible to the naked eye. Layer-by-layer crystallization is not a rejection symptom. Under the control of the macrostructure on a cross templeto allowed: - on a point inhomogeneity ≤ 1.0 points; - the Central porosity ≤ 1.0 points; - phase separation in the square ≤ 1.0 points. Contamination of metal non-metallic inclusions should be (for maximum points): - sulphides With ≤ 1,0; - oxides of stroke OS ≤ 2,0; - oxides of point ≤ 2,0; - silicates fragile CX ≤ 2,0; silicates plastic SP ≤ 1,0; - silicates, non-deformed SN ≤ 1,0. The fragile silicates allows for a single attack with a score of no more than 3.0.
Particularities of production of goods	Bars of billets on the other 14-1-1401-75 are supplied in the annealed and peeled condition. The purity of roughing the surface should correspond to the 3 class according to GOST 2789 or agreed to by the parties, the standard of cleanliness of the surface with the heavy duty centerless grinding machines.