02Х8Н22С6 - эп794 sheet, round, wire

International Equivalent

Mark	Analogue	W. Nr.	Aisi Uns	En	Order
02Х8Н22С6	EP794				Delivery from the stock, in stock

Feature

Brand 02Х8Н22С6 refers to a complex alloyed austenitic steels. Production normalized such THAT: 14−1-1024−81; 14−1-3164−81; 14−1-3233−81; 14−1-3660−83; 14−1-3812−84; 14−1-3801−85; 14−1-5076−91. Is melted using a plasma arc, vacuum-arc melting, ESR (electroslag remelting). Is the basis of welded chemical reactors operating in contact with a concentrated 85% nitric acid at t° to 100 °C.

Percentage composition

C	Cr	Si	Mn	Ni	R	S	Fe
≤0,02	7,5 -1	Of-6,7 5,4	≤0,6	21 — 23	≤0,03	≤0,02	Basis

Mechanical properties at 20 °C

Assortment	TU	σ_0,2,	σ_in,	δ₅,	KCU,
Hot rolled sheet	14−1-3801−85	195	540	40
Cold-rolled sheet	14−1-5076−91	195	540	40
Bars	14−1-3812−84	175	520	45	70
Seamless tubes	14−3-1024−81	195	588	35

Fizicheskaya rolled at high t º (grade Ø 15 mm, quenching in water from 1050 °C)

t_COI, °C	σ_0,2, N/mm2	σ_in N/mm2	δ, %	KCU, j/cm²	n,	M_cu, N · m
700	280	320	77	-	9	-
800	190	200	112	370	17	31
900	80	90	133	350	29	18
1000	30	50	153	260	38	11
1100	17	33	147	220	43	60
1150	15	20	140	120	24	-
1200	10	15	112	30	12	40
1250	-	-	-	30	-	-

Mechanical properties of alloy at 20 °C irrespective of the degree of cold deformation

St. compression, %	σ_0,2, N/mm2	σ_in N/mm2	δ, %	The degree of compression, %	σ_0,2, N/mm2	σ_in N/mm2	δ, %
0	300	720	72	70	1230	1340	5
10	600	820	45	80	1340	1390	3
30	940	1030	23	90	1430	1500	2
50	1110	1190	8	-	-	-	-

Physical properties at t=20 °C

Density is equal to 7.7 g/cm³; modulus of elasticity = 17,8 · 10^-4 N/mm²; the thermal conductivity = 0,134 · 102 W/(m · K).

Values of temperature coefficient of linear expansion (α) and elastic modulus (E)

t_COI, °C	α · 10⁶, ^-1	t_COI, °C	E · 10^-4 N/mm²
20−100	12,3	100	17
20−200	14.4 V	200	16,4
20−400	15,7	400	15,2
20−600	16,6	600	14
20−800	17,4	700	13,2
20−900	17,9	800	12,2
20 to 1000	18	-	-

Resistance to corrosion

On the other 14−1-3801−84 the 14−1-5076−91 02Х8Н22С6 steel resistant to intergranular corrosion after 24-hour test in boiling 72% nitric acid solution. Before the test the steel for 20 minutes provoking subjected to heating to 600 °C with subsequent air cooling.

The corrosion rate of steel in nitric acid

HNO₃, %	ν, mm/year, t º	ν, mm/year, t º	HNO₃, %	ν, mm/year, t º	ν, mm/year, t º
	90 °C	100 °C		90 °C	100 °C
65	0,33	0,71	85	0,11	0,2
75	0,22	0,5	93	0,05	0,14

Note: steel has a high resistance to stress corrosion cracking in 42% solution of magnesium chloride.

Treatment

The temperature interval of hot deformation is 1150−850°C. both hot and in cold condition the steel is easily subjected to stamping. Annealing is carried out in water at t° 1050 °C; the heating time and the exposure time set at the rate of 2 min/mm of thickness. The same treatment is applied for removing the work hardening after hot plastic deformation, but also after cold deformation.

Welding

Welded using automatic or manual welding. For RDS use electrodes OzL-24 wire grade 02Х17Н14С4. For automatic or manual argon-arc arc — recommended wire grade 02Х8Н22С6. The corrosion rate of such welded joints in 98% HNO3 at 100 °C = 0.22 mm/year. To prevent intergranular corrosion of the part after welding must be subjected to quenching in water at t° 1050 °C.

Buy at best price

OOO «Elektrovek-steel» implements a wide range of stainless steel. Our offices are located in Russia and Ukraine. You can make a purchase without leaving the office, through the Internet website of the Company. Processing complete each stage of production allows to fulfill individual orders, if the underlying performance of products you are not satisfied. We perform quality orders for non-standard settings, deadlines minimum. When wholesale purchases discounts are available.