Steel 03KH17N14M3 (ЗИ66)

Designation

Name	The value
Designation GOST Cyrillic	03Х17Н14М3
Designation GOST Latin	03X17H14M3
Transliteration	03H17N14M3
By chemical elements	03Cr17Н14Mo3

Name	The value
Designation GOST Cyrillic	ЗИ66
Designation GOST Latin	ZI66
Transliteration	ZI66
By chemical elements	ЗИ66

Description

03KH17N14M3 steel is used: for the manufacture of rolled plates (6−20 mm); welded constructions working in the conditions of action of the boiling phosphoric, sulfuric, 10% acetic acid and sulfuric acid media intended for long-term service at operating temperatures to +600 °C, welded structures operating in environments of increased aggressiveness at temperatures down to -196 °C; all connections of equipment installed in radioactive environments and in contact with aggressive environment; pipes tsentrobezhnolityh for the manufacture of the coils of the tubular furnace installations production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range of +760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm²); instrument in chemical engineering.

Note

Romancelatina low carbon steel corrosion resistant austenitic class.

Standards

Name	Code	Standards
Steel pipes and fittings to them	В62	GOST 11068-81, TU 1333-047-00220302-02, TU 14-159-250-95, TU 14-3-1348-85, TU 14-3-396-75, TU 14-3-1357-86, TU 14-158-137-2003
Processing of metals by pressure. Forgings	В03	GOST 25054-81
Sheets and strips	В33	GOST 5582-75, GOST 7350-77, TU 14-1-5054-91, TU 14-1-5056-91, TU 14-1-5071-91, TU 14-1-5073-91, TU 14-1-2144-77, TU 14-1-1541-75
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, TU 14-1-3303-82, TU 14-11-245-88
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-1183-74, TU 14-1-3931-84, TU 14-1-565-84, TU 14-1-2132-77, TU 14-134-293-91
Welding and cutting metals. Soldering, riveting	В05	OST 95 10441-2002
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	Ca	W	Ce
GOST 5632-72	≤0.03	≤0.02	≤0.035	1-2	16.8-18.3	≤0.4	13.5-15	Rest	≤0.3	≤0.2	≤0.05	2.2-2.8	-	≤0.2	-
TU 14-1-5073-91	≤0.03	≤0.02	≤0.035	1-2	16.8-18.3	≤0.4	13.5-15	Rest	≤0.3	≤0.2	≤0.05	2.2-2.8	0.05	≤0.2	0.05
TU 14-1-5071-91	≤0.025	≤0.02	≤0.03	1-2	16.8-18.3	≤0.3	13.5-15	Rest	≤0.3	≤0.2	≤0.05	2.2-2.8	-	≤0.2	-
TU 14-3-1348-85	≤0.02	≤0.02	≤0.015	1-2	16-18	≤0.4	13-15	Rest	≤0.3	≤0.2	≤0.3	2.5-3	-	≤0.2	-
TU 14-158-137-2003	≤0.03	≤0.02	≤0.03	1-2	16.8-18.3	≤0.4	13.5-15	Rest	-	-	≤0.05	2.2-2.8	-	-	-
TU 14-1-1541-75	≤0.03	≤0.02	≤0.035	1-2	16-18	≤0.4	13-15	Rest	-	-	≤0.05	2.5-3.1	-	-	-

Fe is the basis.
According to TU 14-1-5071-91 the chemical composition is given for steel grade 03X17N14M3-VI. Deviations in chemical composition and content of residual elements (copper, tungsten, titanium, vanadium) - according to GOST 5632. It is allowed to introduce technological additions of cerium and calcium in an amount up to 0.050% each. The amount of cerium and calcium is calculated and chemical analysis is not determined, but is recorded in the quality document.
According to TU 14-158-137-2003, cerium and other rare-earth metals can be introduced by 0.2-0.3%, which are not determined by chemical analysis.
According to TU 14-1-1541-75, the chemical composition is given for steel grade 03X17N14M3 (ZI66). The tolerance for silicon content is + 0.40%, sulfur + 0.0050%. It is allowed to increase the molybdenum content by + 0.20%. The content of other residual elements is according to GOST 5632.
According to TU 14-1-5054-91, the chemical composition is given for steel grade 03Х17Н14М3-ВО (ЗИ66-ВО). The content of residual elements - copper, tungsten, titanium, vanadium - is allowed in accordance with GOST 5632. Cerium additions in the amount of 0.050%, calcium in an amount of 0.050% are allowed, the content of which is calculated and chemical analysis is not determined. In the melting sample and in finished rolled products deviations from the chemical composition are allowed in accordance with GOST 5632.
According to TU 14-1-5073-91 the chemical composition is given for steel grade 03X17N14M3 (ZI66). The introduction of technological additions of cerium in an amount of 0.050% and calcium in an amount of 0.050% is allowed, the content of which is calculated and chemical analysis is not determined.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	HB, MPa
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air with 1030-1070 °C
-	≥196	≥490	≥40	-	-
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water or air with 1080-1100 °C
-	≥196	≥490	≥40	-	-
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water or air with 960-1050 °C + Vacation at 275-350 °C, air cooling
	≥885	≥1080	≥10	-	-
Sheet hot-rolled steel in the delivery state on the other 14-1-1541-75. Quenching in water from 1050-1075 °C
4-11	≥196	≥490	≥40	-	-
Forgings. Quenching in water from 1070-1100 °C
	≥176	≥470	≥40	≥45	≥179
Bars hot rolled and forged according to GOST 5949-75. Quenching in water from 1070-1100 °C
	≥196	≥490	≥40	-	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air with 1100-1120 °C
	≥200	≥500	≥40	≥45	-
Bars on the other 14-1-3303-82. Quenching in water from 1050-1070 °C
	≥196	≥490	≥40	-	-
Heavy-gauge hot-rolled steel in the delivery state on the other 14-1-5073-91. Quenching in water or under a water shower with 1080-1100 °C
20-50	≥196	≥490	≥40	-	-
Rolled plates in the state of delivery on the other 14-1-5054-91. Quenching in water from 1100-1120 °
	≥196	≥490	≥40	-	-
Rolled plates in the state of delivery on the other 14-1-5071-91. Quenching in water with 1100-1140 °C
6-20	≥196	≥490	≥40	-	-
Thin-sheet cold-rolled steel in the delivery state on the other 14-1-5056-91. Quenching in water or under a water shower with 1060-1080 °C
0.8-3.9	≥196	≥490	≥40	-	-
Tsentrobezhnolityh pipe outer diameter 85-320 mm. Quenching in water or air from 1100-1150 °C
	≥200	≥480	≥30	-	-

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
HB	Brinell hardness number

Physical characteristics

Temperature	r, kg/m³
20	8000

A description of the physical symbols

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

Technological properties

Name	The value
Weldability	Limited-weldability requires primene combined welding techniques.
Macrostructure and pollution	The macrostructure of the steel on the other 14-1-3303-82 should not be visible without using the magnifying devices of the traces of shrinkage, bubbles, cracks, and slag inclusions. Macrostructure and surface quality of the sheets on the other 14-1-5056-91 must meet M2a-M3A group surface finish GOST 5582.
Microstructure	The contents of alpha phase in the rental should not exceed 0.5 points. Steel on the other 14-1-3303-82 controlled for the content of alpha-phase. The contents of alpha phase shall not exceed 2.0 points.
Features of heat treatment	Products hromonikelevoj steel stabilized with titanium, to remove residual stresses and prevent stress corrosion cracking may be subjected to heat treatment according to the requirement stipulated in the draft mode which should be agreed with specialized organization. Steel products are subjected to hardening in order to improve the overall corrosion resistance and ductility, to eliminate the tendency to intergranular corrosion. Hardening is performed according to the mode: heating up to 1100-1120 °C, cooling in water or air. The holding time at the heating for hardening to products with a wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm maximum thickness. Products with wall thickness up to 10 mm is to be cooled in the air, more than 10 mm in water. Welded parts of complex configuration in order to avoid the leash is to be cooled in the air. To give steel the greatest plasticity and the elimination of the structure of the Sigma phase quenching is recommended when heated to the upper limit. Heat treatment nesvorny products to relieve internal stresses and prevent stress corrosion cracking should be carried out in the following mode: heating up to 900±10°C, exposure time of 2-3 h, air cooling. Welded components manufactured from steel hromonikelevoj with the use of unregulated electrodes, to remove residual stresses and prevent stress corrosion cracking should be subjected to heat treatment regime: heating to a 1020-1060 °C, exposure 2 h, air cooling. Products for welded low carbon pure austenitic electrodes, heat-treated to relieve residual stresses and prevent stress corrosion cracking should be carried out according to mode: heating to a 1020-1060 °C, exposure 2 h, cooling with the furnace to 300 °C, then in air. Products, welded electrodes, stabilized by niobium, should be termoobrabotki to relieve residual stresses and prevent stress corrosion cracking according to the mode: heating up to 1100-1140 °C, exposure 2 h, cooling with the furnace to 300 °C, then in air.
Corrosion resistance	The corrosion rate of hire should not exceed 0.5 mm/year. Steel 03KH17N14M3 has a high resistance against intergranular corrosion and knife than steel brands 08KH17N15M3T and 10X17H13M2T.
The tendency to intergranular corrosion	Bars on the other 14-1-3303-82 should not possess the propensity to intergranular corrosion in the hardened state.