12Х12М1БФР steel is used: for the manufacture of pipes, designed for continuous operation at temperatures up to +630 °C, power equipment and nuclear power plant equipment; wire diameter 1.05 mm, intended for manufacturing of components in nuclear power facilities operating in the environment of liquid alkali metals.

Note

High-temperature corrosion-resistant chromium steel, alloy boron steel of ferrite-martensitic type.

Standards

Name	Code	Standards
Blanks. Of the workpiece. Slabs	В31	TU 14-1-3820-84
Bars and shapes	В32	TU 14-131-992-2003
Low carbon steel wire	В71	TU 14-159-341-2010
Steel pipes and fittings to them	В62	TU 14-3-1511-87

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	V	B	Mo	Nb	Ca
TU 14-159-341-2010	0.1-0.15	≤0.015	≤0.025	≤1	11-13.5	≤0.5	0.05-0.3	Rest	0.1-0.3	0.005-0.015	1.5-2	0.15-0.4	0.001-0.05
TU 14-3-1511-87	0.1-0.15	≤0.015	≤0.025	≤0.8	11-13.5	≤0.5	0.05-0.3	Rest	0.1-0.3	≤0.08	1.2-1.8	0.25-0.55	-

Fe is the basis.
According to TU 14-3-1511-87, the chemical composition is given for steel grade 12X12M1BFR-SH (EP450-SH).
According to TU 14-1-3820-84, the chemical composition is given for steel grade 12X12M1BFR-SH (EP450-SH). Boron and calcium are introduced into the metal by calculation and chemical analysis are not determined. Deviation in niobium is allowed to be -0.10%.
According to TU 14-159-341-2010 the chemical composition is given for steel grade 12X12M1BFR-SH (EP450-SH). Boron and calcium are introduced into the metal by calculation and chemical analysis are not determined. The calculated content of boron and calcium is recorded in the document on the quality of the pipes. In the finished product, deviations in chemical composition are allowed: niobium -0.10%, phosphorus +0.0050%, chromium ± 0.10%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d
Wire on the other 14-159-341-2010 in the delivery condition. In the graph δ indicates the value δ100
1.05	-	≥620	-	≥10
Tubular billet on the other 14-1-3820-84. Quenching in water from 1050-1080 °C + Vacation at 720-740 °C (aging of 1.0-1.5 h), air cooling (longitudinal samples)
	≥275	≥310	≥20	-
Pipe cold-worked welded austenitic beyond 14-3-1511-87. Normalization at 1000-1050 °C, air cooling + Vacation at 750-780 °C (extract 3 hrs), air cooling (longitudinal samples)
	≥640	≥820	≥17	-
Tubular billet on the other 14-1-3820-84. Quenching in water from 1050-1080 °C + Vacation at 720-740 °C (aging of 1.0-1.5 h), air cooling (longitudinal samples)
	≥490	≥640	≥12	-
	≥343	≥490	≥12	-

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
d	Elongation after rupture

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
20	228	7850	276	-
200	215	-	24	1113
300	209	-	251	1142
400	195	-	263	118
500	188	-	272	12
600	173	-	28	1215
700	155	-	289	1215
100	-	-	218	1115
800	-	-	-	1265
900	-	-	-	116

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity
С	Specific heat

Steel 12Х12М1БФР (ЭП450)

Designation

Description