Steel 12X17 (X17)

Designation

Name	The value
Designation GOST Cyrillic	12Х17
Designation GOST Latin	12X17
Transliteration	12H17
By chemical elements	12Cr17

Name	The value
Designation GOST Cyrillic	Х17
Designation GOST Latin	X17
Transliteration	H17
By chemical elements	Cr17

Description

12X17 steel is used: for manufacturing of household articles and kitchen utensils, the equipment of factories of food and light industry; fasteners, rollers, bushings and other parts of machines and vessels working in dilute solutions of nitric, acetic, citric acids, solutions of salts having oxidative properties; for the production of heat exchangers and pipes.

Note

Steel ferritic corrosion-resistant and heat-resistant to +850 °C.
Temperature intense scaling in air +900 °C.
Usually applied, in the annealed condition.
Steel for the manufacture of welded structures is not recommended!

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and strips	В33	GOST 4405-75, GOST 5582-75, GOST 7350-77
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88, TU 14-1-1271-75
Steel pipes and fittings to them	В62	GOST 9940-81, GOST 9941-81, TU 14-3-1654-89
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-565-84
Processing of metals by pressure. Forgings	В03	ST ЦКБА 010-2004, STP М386-79
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 016-2005
Castings with special properties (iron and steel)	В83	TU 14-1-1650-76
Tape	В34	TU 14-1-367-72
Wire, steel, alloy	В73	TU 14-4-740-76
Steel wire medium and high carbon	В72	TU 14-4-932-78

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Fe	Cu	V	Ti	Mo	W
GOST 5632-72	≤0.12	≤0.025	≤0.035	≤0.8	16-18	≤0.8	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2

Fe is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Blank pieces of pipe fittings according to ST CKBA 016-2005. Annealing at 760-780 °C, air cooling or Annealing at 760-780 °C, air cooling
≤60	≥245	≥392	≥20	≥50	≥294	126-197
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥84	≥67	≥97	-	-
Blank pieces of pipe fittings according to ST CKBA 016-2005. Annealing at 760-780 °C, air cooling or Annealing at 780-810 °C (20 h exposure), cooling with the furnace
≤60	≥157	≥392	≥25	≥55	≥49	126-197
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥40	≥64	≥98	-	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-780 °C
-	-	≥490	≥20	-	-	-
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥22	≥58	≥98	-	-
Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Annealing or vacation at 760-780 °C, air cooling or furnace
-	-	≥440	≥18	-	-	-
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥21	≥81	≥97	-	-
Bars hot rolled and forged according to GOST 5949-75. Annealing at 760-780 °C, air cooling or water
	≥245	≥390	≥20	≥50	-	-
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥14	≥73	≥97	-	-
Seamless hot deformed tubes in the delivery condition according to GOST 9940-81
	-	≤441	≥17	-	-	-
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥8	≥85	≥99	-	-
Tubes in the delivery condition. Annealing or vacation at 740-780 °C (in cross-section shows the thickness of the wall)
3.5-32	-	≤441	≥17	-	-	-
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s
-	-	≥6	≥99	≥97	-	-
Tubes in the delivery condition. Annealing or vacation at 740-780 °C (in cross-section shows the thickness of the wall)
0.2-22	-	≤441	≥17	-	-	-
Rolled steel. Annealing at 780 °C, air cooling
-	≥310	≤510	≥28	≥70	-	-
-	≥290	≤450	≥27	-	-	-
-	≥265	≤460	≥26	-	-	-
-	≥255	≤440	≥25	-	-	-
-	≥145	≤195	-	-	-	-

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

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	232	93	7720	-	560	-	-
20	232	-	7720	-	560	-	-
100	227	89	-	24	610	104	462
200	219	85	-	24	680	105	-
300	211	82	-	25	770	108	462
400	201	78	-	26	850	112	-
500	192	85	-	26	950	114	-
600	182	69	-	-	1030	116	-
700	165	61	-	-	1110	119	-
800	148	-	-	-	1150	119	-
900	-	-	-	-	1160	-	-
1000	-	-	-	-	-	121	-

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	Difficult weldability. Welding methods: RDS, ARDS. Recommended subsequent heat treatment.
Склонность к отпускной хрупкости	Inclined at a temperature of +475 °C during long exposures.
The temperature of forging	Start - 1250 °C, the end of - 900 °C. the cross Sections up to 350 mm cooled in air.
Features of heat treatment	To obtain characteristic values of mechanical properties and hardness set ST CKBA 010 and to achieve maximum corrosion resistance, parts (workpiece) valves shall be subjected to annealing. To reduce the residual magnetic induction in the magnetic circuit of the electromagnets of the details (blank) should be subjected to prolonged annealing. Prolonged annealing of workpieces is applied to reduce the residual magnetic induction in the magnetic circuit of the electromagnets and provides magnetic properties to steel grade 12X17 coercive force HC equal to 0,23 ka/m in residual magnetic induction, RF 0.3 Mm TL; the largest saturation induction Bs is 1.6 T at 20 Nm ka/I. Welded components and products of steel 12X17 for improving the corrosion resistance is subjected to annealing regime: heating up to 775-800 °C, exposure - 2-3 h, air cooling in the absence of the requirements of the resistance to the ICC; heating to 780-820 °C, exposure - 8 hours air cooling when the demand resistance to the ICC.