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 | σ0,2, | σin, | 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)
tCOI, °C | σ0,2, N/mm2 | σin N/mm2 | δ, % | KCU, j/cm2 | n, | Mcu, 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, % | σ0,2, N/mm2 | σin N/mm2 | δ, % | The degree of compression, % | σ0,2, N/mm2 | σin 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)
tCOI, °C | α · 106, -1 | tCOI, °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.