Steel 12KH1MF (12ХМФ; 12ХМФА)

Designation

Name	The value
Designation GOST Cyrillic	12Х1МФ
Designation GOST Latin	12X1MF
Transliteration	12H1MF
By chemical elements	12Cr1MoV

Name	The value
Designation GOST Cyrillic	12ХМФ
Designation GOST Latin	12XMF
Transliteration	12HMF
By chemical elements	12CrMoV

Name	The value
Designation GOST Cyrillic	12ХМФА
Designation GOST Latin	12XMFA
Transliteration	12HMFA
By chemical elements	12CrMoV

Description

12KH1MF steel is used: for the manufacture of cold-rolled fin tubes with outer diameter 32, 38 and 50 mm, designed for steam boilers with supercritical parameters of steam; superheaters tubes, pipes and collecting high-pressure, forgings for steam boilers and steam pipes; parts, cylinders of gas turbines; various parts operating at temperatures up to +570−585 °C; details of pipes and valves with quenching in air or oil and leave on the air; details of the type of bottoms, collar flanges, fittings, rings, nozzles, tees and parts of rectangular shape for power equipment and pipelines with an absolute pressure of more than 3.9 MPa and thermal power plants; of billets intended for the manufacture of seamless cold, warm, hot-wrought, including hot-pressed and hot-pressed reduced pipes for steam boilers and pipelines, installations with high and supercritical steam parameters; pipe diameter from 57 to 168 mm for use in the system of gas pipelines, oil and gas pipelines, technological pipelines, transporting oil and petroleum products, as well as in the systems of reservoir pressure maintenance in terms of climatic zones with temperature of the transported medium from +5° C to +40° C.

Note

Micro-alloyed steel parlingo class increased corrosion resistance and cold-resistance. The pipe of steel grade 12ХМФА different from oil and gas pipes standard high cold resistance, high resistance to General and pitting corrosion, resistance to sulfide corrosion cracking and hydrogen cracking.
Temperature intense scaling +600 °C.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006
Sheets and strips	В33	GOST 4405-75, TU 108.1273-84, TU 14-1-1584-75, TU 14-1-687-73
Sheets and strips	В23	GOST 5520-79, GOST 103-2006
Bars and shapes	В32	GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 20072-74, TU 14-1-1397-75, TU 14-1-3987-85, TU 14-11-245-88, TU 14-1-1529-2003
Blanks. Of the workpiece. Slabs	В21	OST 14-13-75
Processing of metals by pressure. Forgings	В03	OST 5Р.9125-84, OST 108.030.113-87, TU 0306.018-80, ST ЦКБА 010-2004
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 026-2005
Blanks. Of the workpiece. Slabs	В31	TU 108-938-80, TU 14-1-4992-91
Tape	В34	TU 14-175-90-89
Steel pipes and fittings to them	В62	TU 14-3-341-75, TU 14-3-463-2005, TU 14-3-460-2009, TU 1310-030-00212179-2007, TU 14-3Р-55-2001, TU 14-3-460-2003, TU 1308-226-0147016-02

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Al	V	Ti	Mo	W
TU 14-1-3987-85	0.1-0.15	≤0.025	≤0.025	0.4-0.7	0.9-1.2	0.17-0.37	≤0.3	Rest	≤0.3	-	-	0.15-0.3	-	0.25-0.35	-
TU 108.1273-84	0.08-0.15	≤0.02	≤0.02	0.4-0.7	0.9-1.2	0.17-0.37	≤0.3	Rest	≤0.35	-	-	0.15-0.3	-	0.25-0.35	-
GOST 5520-79	0.08-0.15	≤0.025	≤0.025	0.4-0.7	0.9-1.2	0.17-0.37	≤0.3	Rest	≤0.2	-	≤0.02	0.15-0.3	-	0.25-0.35	-
GOST 20072-74	0.1-0.15	≤0.025	≤0.03	0.4-0.7	0.9-1.2	0.17-0.37	≤0.3	Rest	≤0.2	-	-	0.15-0.3	≤0.03	0.25-0.35	≤0.2
TU 14-3-460-2003	0.1-0.15	≤0.025	≤0.025	0.4-0.7	0.9-1.2	0.17-0.37	≤0.25	Rest	≤0.2	-	-	0.15-0.3	-	0.25-0.35	-
TU 14-3-341-75	0.08-0.15	≤0.025	≤0.025	0.4-0.7	0.9-1.2	0.17-0.37	≤0.25	Rest	≤0.2	-	-	0.15-0.3	-	0.25-0.35	-
TU 1308-226-0147016-02	0.09-0.13	≤0.01	≤0.015	0.35-0.65	0.8-1.1	0.17-0.37	≤0.25	Rest	≤0.25	≤0.008	0.02-0.05	0.03-0.08	-	0.15-0.3	-

Fe is the basis.
According to GOST 5520-79 in the manufacture of steel scrap-process, the mass fraction of copper should not be more than 0.30%.
According to GOST 20072-74, when steel is scrap-process, the content of Cu ≤ 0.30%. Tungsten is allowed up to 0.20%, titanium up to 0.030%. When smelting steel by the method of electroslag remelting, the mass fraction of sulfur should not be more than 0.015%.
According to TU 14-1-1529-2003, TU 14-3-460-2003 and TU 14-3-341-75 for steel produced by scrap process or from cuprous ores, the mass fraction of residual copper and nickel is allowed up to 0.30 % of each. A technological addition of rare earth elements is allowed to improve the quality of the metal.
According to TU 14-3R-55-2001, the chemical composition is given for steel grade 12X1MF; For steel made by scrap-process or from cuprous ores, the content of copper and nickel is allowed to not exceed 0.30% of each. For steel grade 12X1MF-PV, the carbon mass fraction is 0.11-0.15%, nickel, copper, sulfur and phosphorus ≤ 0.15% each, the mass fraction of the remaining elements is identical to 12X1MF steel. The presence of rare-earth elements introduced as technological additives is allowed.
According to TU 1308-226-0147016-02 the chemical composition is given for steel grade 12ХМФА. Pipes should be made of steel that has been modified by calcium and its alloys. Permissible deviations in the content of chemical elements in finished rolled products in accordance with GOST 4543. The content of metallurgical hydrogen in steel is not more than 2 ppm.
According to TU 108.1273-84, the chemical composition is given for steel grades 12X1MF-VD. Deviations in chemical composition are allowed: by carbon + 0.010%, for silicon + 0.050 / -0.020%, for manganese + 0.050 / -0.10% (for steel smelted by the VAR method) and -0.10% (for steel smelted in the electric arc furnace), in nickel + 0.10%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa	HRB
The sheets in the delivery condition on the other 108.1273-84
-	-	≥294	≥441	≥20	≥60	≥1176	-	-
-	-	≥196	≥352.8	≥16	≥60	-	-	-
Forgings. Normalization
100-300	-	≥215	≥430	≥20	≥48	≥481	123-167	-
300-500	-	≥215	≥430	≥18	≥40	≥432	123-167	-
500-800	-	≥215	≥430	≥16	≥35	≥383	123-167	-
100	-	≥215	≥430	≥24	≥53	≥530	123-167	-
100-300	-	≥245	≥470	≥19	≥42	≥383	143-179	-
300-500	-	≥245	≥470	≥17	≥35	≥334	143-179	-
Pipe the seamless hot-deformed heat-treated in the delivery condition on the other 1308-226-0147016-02 (provided the toughness of the Charpy specimens at -60 °C, the proportion of a viscous component at -60 °C ≥70%)
-	-	386-512	≥512	≥25	-	≥1274	-	≤93
Blank pieces of pipe fittings. Quenching in air or oil from 930-950 °C (exposure for 2.5-4.5 hours depending on the thickness and weight of the workpiece) with following tempering and air cooling
≤250	740-760	≥255	≥470	≥20	≥50	≥589	131-170	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	320-450	510-580	25-33	67-77	-	-	-
Sheet 2, 3, 16, 18-20 categories, treated in the delivery condition
≤5	-	≥295	440-590	≥21	-	-	-	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	330	480-490	22	75	-	-	-
Sheet 2, 3, 16, 18-20 categories, treated in the delivery condition
≤5	-	≥295	470-640	≥21	-	-	-	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	315-325	435-470	18-20	67-74	-	-	-
Sheet 2, 3, 16, 18-20 categories, treated in the delivery condition
5-40	-	≥295	470-590	≥21	-	≥784	-	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	315-325	430-450	21-24	75	-	-	-
Sheet 2, 3, 16, 18-20 categories, treated in the delivery condition
5-40	-	≥295	470-640	≥21	-	≥784	-	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	215-315	305-500	20-26	78-84	-	-	-
Steel hot-rolled sheet on the other 14-1-687-73. Normalization + High holidays
1.4; 2.0; 3.0	-	≥294	≥490	≥21	-	-	-	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	205-245	295-440	22-28	66-84	-	-	-
Forgings for parts resistant to the ICC. Normalization of 960-980 °C, air cooling + Vacation 740-760 °C in the air
≤250	-	≥255	≥470	≥20	≥50	≥589	131-167	-
Normalization at 950-1030 °C + Vacation at 680-760 °C
-	-	185-265	225-440	23-38	74-85	-	-	-
The longitudinal sample (from the pipe) with a diameter of 6 mm, length 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥73	≥82	≥36	≥85	-	-	-
-	-	≥51	≥66	≥44	≥97	-	-	-
-	-	≥44	≥60	≥54	≥98	-	-	-
-	-	≥35	≥50	≥60	≥100	-	-	-
-	-	≥30	≥42	≥56	≥100	-	-	-
-	-	≥23	≥31	≥58	≥100	-	-	-
Rolled steel. Normalization at 910-930 °C, air cooling + Vacation at 670-690 °C, air cooling
-	-	≥235	≥410	≥21	≥45	≥579	-	-
The longitudinal sample (from the pipe) with a diameter of 6 mm, length 30 mm. the Rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥14	≥18	≥55	≥100	-	-	-
Rolled steel. Normalization at 960-980 °C, air cooling + Vacation at 700-750 °C, air cooling
90	-	≥255	≥470	≥21	≥55	≥961	-	-
A pipe diameter of 273 mm with a wall thickness of 29 mm. Normalization at 980-1000 °C + Vacation at 740-760 °C
-	-	≥305	≥490	23-33	71-74	-	-	-
Tubular billet + hot deformed Tubes (DH=57-465 mm) TU 14-3-460-2003. Normalization at 950-980 °C + Vacation at 720-750 °C (aged for at least 1 h), air cooling
20-25	-	≥255	440-640	≥18	≥45	≥490	-	-
A pipe diameter of 273 mm with a wall thickness of 29 mm. Normalization at 980-1000 °C + Vacation at 740-760 °C
-	-	≥225	≥355	≥28	≥83	-	-	-
Tubular billet + hot deformed Tubes (DH=57-465 mm) TU 14-3-460-2003. Normalization at 950-980 °C + Vacation at 720-750 °C (aged for at least 1 h), air cooling
20-25	-	≥255	470-640	≥21	≥55	≥590	-	-
A pipe diameter of 273 mm with a wall thickness of 29 mm. Normalization at 980-1000 °C + Vacation at 740-760 °C
-	-	≥205	≥345	≥25	≥81	-	-	-
-	-	≥225	≥410	≥28	≥78	-	-	-
Seamless pipes for steam boilers and pipelines from 12KH1MF steel grades and 12KH1MF-PV according to TU 14-3P-55-2001. Normalization at 950-980 °C + Vacation at 720-750 (extract 1-3 hours), air cooling
-	-	≥274	441-637	≥19	≥50	≥490	-	-
A pipe diameter of 273 mm with a wall thickness of 29 mm. Normalization at 980-1000 °C + Vacation at 740-760 °C
-	-	≥205	≥390	≥25	≥80	-	-	-
Seamless pipes for steam boilers and pipelines from 12KH1MF steel grades and 12KH1MF-PV according to TU 14-3P-55-2001. Normalization at 950-980 °C + Vacation at 720-750 (extract 1-3 hours), air cooling
-	-	≥274	441-637	≥21	≥55	≥590	-	-
A pipe diameter of 273 mm with a wall thickness of 29 mm. Normalization at 980-1000 °C + Vacation at 740-760 °C
-	-	≥215	≥430	≥24	≥73	-	-	-
Pipe cold-rolled fin on the other 14-3-341-75. Normalization at 960-990 °C (aged for at least 10 min) + Vacation at 720-750 °C (delay of 1-3 h), air cooling
32, 38, 50	-	≥275	442-638	≥21	-	-	-	-
A pipe diameter of 273 mm with a wall thickness of 29 mm. Normalization at 980-1000 °C + Vacation at 740-760 °C
-	-	≥225	≥480	≥19	≥66	-	-	-
-	-	≥255	≥450	≥23	≥71	-	-	-
-	-	≥285	≥450	≥27	≥73	-	-	-
-	-	≥175	≥215	≥25	≥87	-	-	-
Seamless pipes for steam boilers and pipelines from 12KH1MF steel grades and 12KH1MF-PV according to TU 14-3P-55-2001. Normalization at 950-980 °C + Vacation at 720-750 (extract 1-3 hours), air cooling
	-	≥216	-	-	-	-	-	-
	-	≥206	-	-	-	-	-	-

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
KCU	Toughness
HB	Brinell hardness number
HRB	Rockwell hardness (indenter steel, spherical)

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C
0	198	7800	-	230	-
100	197	7780	44	278	124
200	188	7750	44	343	13
300	183	7720	42	430	136
400	175	7680	40	532	14
500	167	7640	37	647	144
600	157	7600	35	775	147
700	151	7570	32	926	149
800	-	7540	28	1087	-
900	-	7560	28	1130	148
1100	-	-	-	-	12

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
G	Modulus of elasticity shear torsion
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Weldability	limited weldability. Welding methods: SMAW, ADS under gas protection. Recommended heating and subsequent heat treatment.
The temperature of forging	Start - 1240 °C, the end - 780 °C. the cross Sections up to 50 mm are cooled in stacks, 51-100 mm, in boxes of 500-600 mm are subjected to low temperature annealing.
Machinability	In the normalized and tempered condition when NV≤138 and blower SB=460 MPa Kn TV.SPL.=1,50 Kn b.St.=Of 1.35.