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12X17 stainless steel alloy (17 EJ) refers to the type of stainless steel and is intended for use in the manufacture of household items, kitchen utensils, equipment, food, light industry. This alloy is also used for the manufacture of bushings, rollers, fasteners and containers, and details of devices that operate in dilute solutions of citric, acetic, nitric acids, to saline solutions, which have oxidative characteristics, in the manufacture of heat exchangers, pipes, etc.

Note.

-Air temperature intensive scaling is +900 °C.

— ferritic corrosion resistant alloy, heat-resistant to temperatures of +850 °C.

-as used in the annealed condition.

— not recommended for welded structures!

Those. CONV., Standard alloy.

«The technical conditions. With special. finish is round, the surface quality of steel.» According to GOST 14955−77

«Assortment. Rolled steel round bars hot rolled.» According to GOST 2590−2006

«Assortment. Rolled steel square bars hot rolled.» According to GOST 2591−2006

«The technical conditions. High precision shaped steel profiles.» 14−11−245−88

«The grade. Round, square steel forged «. According to GOST 1133−71

«Assortment. Forged, hot-rolled strips of tool steel.» According to GOST 4405−75

«Assortment. Calibrated round steel.» According to GOST 7417−75

«Assortment. Calibrated square steel.» According to GOST 8559−75

«Assortment. Steel mill products hot-rolled strip.». According to GOST 103−2006

«Tekhnich. conditions. Grooved, steel bars, corrosion resistant, heat resistant, heat resistant. «According to GOST 5949−75

» Assortment. Hexagonal bars are grooved.» According to GOST 8560−78

«Forged steel square and round.» According to GOST 1133−71

«Brand. Heat-resistant, heat-resistant steel, corrosion-resistant, high-alloy». According to GOST 5632−72

«Assortment. Hot rolled bars, steel hex. «According to GOST 2879−2006

Chemical characteristics of the alloy 12X17.

Si	S	P	Mn	Cr	C
≤0,80	≤0,035	≤0,025	≤0,80	16,0−18,0	≤0,12

Mechanical properties of stainless steel alloy 12X17. at 20°C

Condition of supply	Section	tисп.,°C	tотпуск,°C	St|S0,2, MPa	sB MPa	d5,%	d4	d	d10	y ,%	KCU, kJ/m2	HB	HRC	HRB	HV	HSh
Billet parts for pipe fittings on the basis of ST CKBA 016−2005. Cooling air temp. 770−780 °C annealing, cooling air, at 780 °C annealing
	≤60			≥245	≥392	≥20				≥50	≥294	126−197
Billet parts for pipe fittings on the basis of ST CKBA 016−2005. Cooling air temp. 770−780 °C annealing, cooling air, 780−810 °C annealing oven (e.20 h),
	≤60			≥157	≥392	≥25				≥55	≥49	126−197
cold-rolled (0,7−3,9 mm) hot rolled size (1.5−3.9 mm) rolled sheet on the basis of GOST 5582−75. Vacation annealing at the temperature. 750−780 °C
					≥490	≥20
sheet hot-rolled steel (4.0 to 25.0 mm) cold-rolled (4,0−5,0 mm) on the basis of GOST 7350−77. Vacation annealing at the temperature. 765−780 °C, cooling air, oven.
					≥440	≥18
Forged, hot rolled black bars, on the basis of GOST 5949−75. Cooling water, air, 765−785 °C annealing
	Sample			≥245	≥390	≥20				≥50
hot-deformed seamless tubes in the delivery condition on the basis of GOST 9940−81
	Sample				≤441	≥17
Vacation, annealing at the temperature. 745−785 °C (section — thickness. wall). In the delivery condition of the pipe.
Pipe Gor/d	3,5−32,0				≤441	≥17
Pipe hole/d	0,2−22,0				≤441	≥17

The physical characteristics 12X17

Temperature ispar., in °C	1000	900	800	700	600	500	400	300	200	100	20	0
The modulus of elasticity is in the process of shear-torsion (G, GPA)				61	69	85	78	82	85	89		93
normal elasticity modulus (E, GPA)			148	165	182	192	201	211	219	227	232	232
Density (r, kg/m3)											7720	7720
The specific resistivity (R, Nom · m)		1160	1150	1110	1030	950	850	770	680	610	560	560
Coefficient the thermal conductivity (l in W/(m · °C))						26	26	25	24	24
The specific heat capacity (j/(kg · °C))								462		462
Linear expansion coefficient (a, 10−61/°C)	12,1		11,9	11,9	11,6	11,4	11,2	10,8	10,5	10,4

At elevated temperatures the mechanical properties.

Delivery status	Cross-section, in mm	sB MPa	tотпуск,°C	St|S0,2, MPa	tисп.,°C	y ,%	d4	d	d10	d5,%	KCU, kJ/m2	HB	HRC	HRB	HV	HSh
Sample diam. 10 mm lengths.50 mm laminated. The strain rate of 0.0004 is equal to 1/s. deformation velocity is 1.1 mm/min.
		≥84			700	≥97				≥67
		≥40			800	≥98				≥64
		≥22			900	≥98				≥58
		≥21			1000	≥97				≥81
		≥14			1100	≥97				≥73
		≥8			1200	≥99				≥85
		≥6			1300	≥97				≥99
At temp. 780 °C annealing, cooling air. Rolled section.
		≤510		≥310	20	≥70				≥28
		≤450		≥290	100					≥27
		≤460		≥265	200					≥26
		≤440		≥255	300					≥25
		≤195		≥145	600

The technological parameters of the alloy 12X17

The temperature of forging	beginning — 1250 °C — 900 °C. the Cooling air cross-section up to 350 mm.
Weldability	Recommended subsequent heat treatment. Weldability difficult. Type of welding: ARDS or RDS.
Heat treatment. features	The annealing of billets used long-term in order to reduce the residual magnetic induction in the magnetic circuit of the electromagnets, thus providing a magnetic quality steel 12X17 when the residual induction of the magnetic RF Of 0.3 Tesla. HC — coercive silurana 0,23 ka/m; Nm 20 ka, the maximum saturation induction Bs is 1.6 T. In the magnetic circuit of the electromagnets to reduce the magnetic induction and residual needs of the workpiece (part) to be subjected to long term annealing. To obtain the hardness and mechanical properties installed at ST CKBA 010, and also to achieve corrosion resistance to the maximum, billet fittings (details) should be subjected to annealing. Welded assemblies and other products 12X17, subjected for increasing corrosion resistance to annealing under such regimes as heating up to temp.775−800 °C and matured for 2−3 h In cases of the absence of any requirements to the durability of microcalli. corrosion — air cooling; heating to temperature. 780−820 °C, With requirements for durability microcalli. corrosion — air cooling, exposure — 8 hours.
The tendency to temper brittleness	12X17 has at the temperature.+475 °C inclination and long exposures to the fragility of the holiday.

Other information about alloy stainless steel 12X17

Temperature critical points:

Critical point	Temperature °C
AR1	810
AC1	860

Hardness:

The status of the delivery. The mode of heat treatment.	HRC surface	HV	HRB	HRC core	HB	HSD
Vacation annealing according to GOST 5949−75. Rolled forged and hot rolled.					126−197

Toughness:

Rolled section. Condition of supply	≥60	≥340	≥30
Able supply temperature	-30	+20	-70

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