Steel 15Х1М1ФЛ

Designation

Name	The value
Designation GOST Cyrillic	15Х1М1ФЛ
Designation GOST Latin	15X1M1FL
Transliteration	15H1M1FL
By chemical elements	15Cr1Mo1V

Description

15Х1М1ФЛ steel is used: for the manufacture of castings parts, steam, gas, hydraulic turbines and axial compressors operating at temperatures up to +560 °C; stationary parts of steam turbines operating at temperatures up to +570 °C; casting equipment parts (valves) for nuclear power stations, heat supply stations, heat and power plants, experimental and research nuclear reactors and installations.

Note

Steel pearlitic class.

Standards

Name	Code	Standards
Castings with special properties (iron and steel)	В83	OST 108.961.02-79, OST 108.961.03-79
Steel castings	В82	OST 108.961.04-80, TU 03.12290-95, TU 5.961-11151-92
Welding and cutting metals. Soldering, riveting	В05	RTM 108.020.122-78

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Mo	Ca	Y
OST 108.961.03-79	0.14-0.2	≤0.025	≤0.025	0.6-0.9	1.2-1.7	0.2-0.4	≤0.3	Rest	≤0.3	0.25-0.4	0.9-1.2	-	-
TU 5.961-11151-92	0.14-0.2	≤0.025	≤0.025	0.6-0.9	1.2-1.7	0.2-0.4	-	Rest	-	0.2-0.4	0.9-1.2	≤0.1	≤0.03

Fe is the basis.
According to OST 108.961.04-80, the total sulfur and phosphorus content should be ≤ 0.050% for all possible tolerances.
According to TU 5.961-11151-92, the total mass fraction of rare-earth metals (REM) should not exceed 0.10%. For castings of grades 1 and 2, the mass fraction of cobalt in steel should not exceed 0.20%, and for castings in the direct irradiation zone it should be 0.15%. The mass fraction of yttrium, calcium and REM in steel is determined by calculation.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d	y, %	KCU, kJ/m²	HB, MPa
Casting parts of gas turbines. Homogenization at 1000-1030 °C, air cooling + Normalization at 970-1000 °C, air cooling + Vacation at 720-750 °C, air cooling
-	≥314	≥490	≥15	≥30	≥290	159-223
Castings with wall thickness up to 100 mm in the delivery state on the other 5.961-11151-92. Homogenization at 1020-1050 NN the fire °C, air cooling + Vacation at 710-740 °C, air cooling + Normalization at 1000-1030 °C, air cooling + Vacation at 720-750 °C. the Critical temperature of brittleness of TKO ≤ 50 °C.
-	≥350	≥500	≥15	≥30	≥490	159-223
Casting parts stationary steam turbines. Homogenization (normalization) at 1000-1030 °C + Normalization at 970-1000 °C + Vacation at 720-750 °C, air cooling
150х170	320-550	≥500	≥15	≥35	≥294	156-223
Castings with wall thickness up to 100 mm in the delivery state on the other 5.961-11151-92. Homogenization at 1020-1050 NN the fire °C, air cooling + Vacation at 710-740 °C, air cooling + Normalization at 1000-1030 °C, air cooling + Vacation at 720-750 °C. the Critical temperature of brittleness of TKO ≤ 50 °C.
-	≥330	≥490	-	≥35	-	-
Casting parts stationary steam turbines. Homogenization (normalization) at 1000-1030 °C + Normalization at 970-1000 °C + Vacation at 720-750 °C, air cooling
100х150	320-550	≥500	≥15	≥35	≥294	159-223
Castings with wall thickness up to 100 mm in the delivery state on the other 5.961-11151-92. Homogenization at 1020-1050 NN the fire °C, air cooling + Vacation at 710-740 °C, air cooling + Normalization at 1000-1030 °C, air cooling + Vacation at 720-750 °C. the Critical temperature of brittleness of TKO ≤ 50 °C.
-	≥310	≥480	-	≥52	-	-
Casting parts stationary steam turbines. Homogenization (normalization) at 1000-1030 °C + Normalization at 970-1000 °C + Vacation at 720-750 °C, air cooling
60х150	320-550	≥500	≥15	≥35	≥294	159-223
Castings with wall thickness up to 100 mm in the delivery state on the other 5.961-11151-92. Homogenization at 1020-1050 NN the fire °C, air cooling + Vacation at 710-740 °C, air cooling + Normalization at 1000-1030 °C, air cooling + Vacation at 720-750 °C. the Critical temperature of brittleness of TKO ≤ 50 °C.
-	≥310	≥480	-	≥57	-	-

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
d	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Technological properties

Name	The value
Weldability	Limited weldability. The welding process - SMAW. When welding requires preheating. After welding and repair of defects by welding is used vacation at 720-740 °C.
Welding defects	Welding defects of castings after cutting is carried out with preliminary and attendant heating to 350-400 °C (with welding defects in the hull casting 150-200 °C). By semiautomatic welding in carbon dioxide environment used wire SV-08ХГСМФА with a diameter of 2 mm at a current of 300-350 A. Welding defects by manual welding is done with electrodes type e-09Х1МФ (GOST 9467) brand ЦЛ20. When heat treated after welding defects to cool in the oven to 100-150 °C at a rate of 30-50 °C/h and further in the air.