08Cr18Ni12B - 1.4550 sheet, circle, wire
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 08X18N12B | EI402 | 1.4550 | 347 | X6CrNiNb18-10 | Delivery from the stock, in stock |
Production and application
Heat-resistant, heat-resistant corrosion-resistant grade 08Cr18H12B is a chromium-nickel alloy of the austenitic class. Production is regulated by the following GOST: 5632-72; 5949-75; 5582-75; 7350-77; 9940-81; 9941-81. Welded equipment for work in nitric acid is made of such steel. This steel is more resistant to knife corrosion compared to alloys 12X18H9T and 12X18HYUT alloyed with titanium.
Chemical composition of the alloy
| C | Cr | Si | Mn | Nb | Ni | P | S | Fe |
|---|---|---|---|---|---|---|---|---|
| ≤0,08 | 17-19 | ≤0,8 | ≤2 | 10-С-1,1 | 11-13 | ≤0,035 | ≤0,02 | Basis |
Mechanical properties (normalized) at 20 ° C
| GOST | Products | σ in, N/mm² | σ0,2, N/mm² | δ5, % |
|---|---|---|---|---|
| 5949-75 | Sections | 500 | 180 | 40 |
| 7350-77 | -thick | 510 | 205 | 40 |
| 5582-75 | -thin | 530 | - | 40 |
| 9940-81 | -hot-deformed | 510 | - | 38 |
| 994-81 | -cold-deformed | 529 | - | 27 |
Mechanical properties at room temperature as well as at elevated temperature (grade, hardening process in water from 1100 °С)
| tisp, °C | σ0,2, N/mm² | σc, N/mm² | δ5, % | ψ, % | tisp, °С | σ0,2, N/mm² | σw, N/mm² | δ5, % | ψ, % |
|---|---|---|---|---|---|---|---|---|---|
| -70 | 310 | 980 | 53 | - | 540 | 190 | 410 | 45 | 65 |
| 20 | 640 | 46 | 63 | 650 | 180 | 350 | 44 | 67 | 290 |
Mechanical properties at high tº (grade Ø18 mm, water hardening process at 1100 °C)
| tisp, °C | σ0.2, N/mm² | σc, N/mm² | δ5, % | ψ, % | KCU, J/cm2 | tisp, °C | σ0,2, N/mm² | σc, N/mm² | δ5, % | ψ, % | KCU, J/cm2 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 700 | 170 | 290 | 52 | 74 | - | 1000 | - | 54 | 42 | 67 | 179 |
| 800 | - | 150 | 16,4 | - | 256 | 1200 | - | 20 | 54 | 85 | 105 |
| 870 | - | 180 | 25 | 39 | - | 1300 | - | 10 | 60 | 88 | 29 |
Physical properties at 20°C
Density 7,9 g/cm3; specific electrical resistance 0,8 Ohm - mm2/m, specific heat capacity 0,504 - 103 J/(kg - K);
Corrosion resistance
Steel 08Х18Н12Б is resistant to oxidation in the air up to 900 °C, as well as to knife corrosion in welded joints and to intercrystalline corrosion. The tests are conducted by the methods: AM and AMU
Process parameters
The ingots are rolled at 1200-900°C. For ingots with high Nb content, it is necessary to reduce the t° of the beginning of deformation to 1150°C. The hot deformation is carried out at 1160-900°C. The steel has good processability during cold deformation in the quenched state.
Welding
For RDS the electrodes CL-11 with a wire Sv-07Cr19N10B and electrodes OZL-7 with a wire Sv-01 (02) Cr19N9 are used. These electrodes give high resistance of welds to intergranular and general corrosion. For welding equipment operating at temperatures up to 750 ° C, such as petrochemical industry, use L-39 electrodes with wires Sv-04Cr19N9 and Sv-06Cr19N9T. If resistance in aggressive medium is necessary at t° up to 600 °C, electrodes L-40M with wire Св-02 (04) Х19Н9 are used.
Delivery
Evek GmbH has a wide range of rolled products of 08X18H12B grade with different parameters in stock. Technical documentation includes data on chemical composition, limiting percentage of impurities; mechanical properties of products. From us you can buy in bulk any semi-finished products for large-scale productions. We also offer optimum conditions for retail buyers. The high level of service and responsiveness of service is the face of our company.
Buy at the best price
Evek GmbH has an unlimited assortment of stainless alloys of the highest quality. We offer special alloys at an optimal price. If you are interested in our offer please contact your nearest office. Qualified specialists will provide all necessary information regarding products, price range, sales conditions. The cost of goods depends on the parameters of products and additional terms of delivery.