02Х18Н11 sheet, circle, wire

International Equivalent

Mark Analogue W. Nr. Aisi Uns En Order
02Х18Н11 Delivery from the stock, in stock

Characteristics

Steel grade 02X18H11 refers to the chromium-nickel austenitic class steels. It is melted in open electric arc furnaces, vacuum induction furnaces with the use of low-carbon ferroalloys. Gas-oxygen refining of liquid metal and vacuum decarburization of melt in the ladle are also possible. Steel must meet the requirements of GOST: 1133−71, 5632−72, 5582−76; TU: 14−1-1160−74, 14−1-2144−77, 14−1-1180−74, 14−1-2450−78, 14−1-3652−83, 14−1-490−72, 14−4-3071−80, 14−1-3071−80. This steel is used in aggressive oxidizing environments in the production of 65% nitric acid under the harshest temperature conditions (in tail gas heaters, in oxidizer condensers).

Percentage composition

C Cr Si Mn Ni S P Fe
≤0,025 17 -19 ≤0,2 ≤2 10,5 -12,5 ≤0,02 ≤0,03 Basis

Mechanical properties at 20 ° C

Range TU σ0.2 N/mm² σ in N/mm² δ5, % ψ, %
rods 14−1-1160−74 500 200 40 50
Hot-rolled plates 14−1-490−72 500 200 45 -
500 14−1-2144−77 200 40 - -
520 14−1-3071−80 200 45 - -
470 14−1-3071−80*1 176 40 - -
520 14−1-1180−74 200 45 - -
Cold rolled ribbon 14−1-3386−82 600−750 - 30 -
540−720 14−1-3652−83 - 37 - -
Seamless pipes 14−3-1401−86*1 460 186 45 -
Tube blanks 14−1-3183−81*1 451 157 - -
490 14−1-2132−77*1 196 45 - -
Cold-rolled sheets GOST 5582−75 500 200 40 -

Mechanical properties of 03Cr18Ni11 steel at room temperature, as well as at elevated tº (sheet size 8 mm, quenched in water at 1100 ° C)

tisp, °C σ0.2, N/mm² σc, N/mm² δ5, % ψ, % tisp, °С σ0, 2, N/mm² σw, N/mm² δ5, % ψ, %
20 280 550 55 73 300 260 390 36 70
150 240 440 40 69 400 190 370 35 67
200 260 420 40 73 450 220 370 33 67

Mechanical properties of steel at high tº (8 mm sheet, quenched in water at 1100 °C, longitudinal specimen)

tisp, °C σ0.2, N/mm² σc, N/mm² δ5, % ψ, % tisp, °С σ0, 2, N/mm² σw, N/mm² δ5, % ψ, %
500 1780 280 38 56 900 80 110 38 66
700 120 210 36 63 1000 25 70 42 78
800 100 130 37 64 - - - - -

Effect of tº hardening on mechanical properties of steel (Mechel OAO supplier’s sheet; data according to GIAP)

after t

Steel Si С σw/σ0.2, N/mm² δ5, % σw/σ0,2, N/mm² δ5, % σw/σ0,2, N/mm² δ5, % σw/σ0,2, N/mm² δ5, %
      1040 °С   1080 °С   1050 °С   1200 °С  
02Cr18Ni11 grade 0,2 0,025 553/228 60 553/220 60 540/205 63 520/200 67
03Cr18Ni11 grade 0,78 0,03 590/250 56 580/250 58 555/205 60 545/210 63

Physical properties

Steel 02Х18Н11 after tempering (1 hour at t ° 650 ° C) must be resistant to intergranular corrosion. The tests shall be carried out by the DU method of GOST 6032−89. The rate of corrosion should not exceed 0.4 mm / year, steel 02X18H11 suitable for the manufacture of heat exchangers, and steel 03X18H11 — for work in contact with HNO3 (concentration up to 70%) at t ° boiling, and in HNO3 (concentration 45−80%) at tº 80−140 °C, as well as in ammonium nitrate, adipic acid and in environments containing nitrous gases, at tº 80 °C and above.

The behavior of the alloy in relation to the corrosion process

С Si Mass loss, g/m² Corrosion depth at seam area*1, in μm 1075 °С 1120 °С 1150 °С
0,025 0,14 83 23 0,19 0,2 0,18

*1 Welded specimens were tested under blowdown column operating conditions in the production of weak nitric acid (56−60% HNO3, at t=130 °C, 10,390 hours).

Processing

The alloy has good processability for cold and hot plastic deformation. The ingots for rolling are heated to 1240 — 1260 ° C Hot deformation usually occurs at t ° 1100−900 ° C. To remove the build-up after hot or cold deformation, softening heat treatment is used. Hardening is carried out in water at 1040−1100ºC. This steel is cut in the same way as alloy X18H10T.

Welding

This steel is characterized by its good weldability. When using RTA, OZL-22 electrodes with Sv-01Cr18Ni10 wire are used. When an automatic welding in shielding gas (submerged arc) wire Sv-01X19N9 and Sv-01X18N10 is used. Welded joints are resistant to knife corrosion in oxidizing environments. They can be annealed to remove stresses without fear of intergranular corrosion. According to the conclusion of NIICHIMMASH the welded joints of 02X18H11 steel have a range of mechanical, corrosion and technological properties similar to those of OZH18H11 steel.

Supply

We supply certified rolled products of 02X18N11 grade. The technical documentation includes data on the chemical composition, the limiting percentage of impurities, the mechanical properties of products. From us you can buy in bulk any semi-finished products for large-scale production. We also offer optimum conditions for retail buyers. The high level of service and responsiveness of service is the face of our company.

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Evek GmbH offers its customers an unlimited choice of stainless steel products of the highest quality at a competitive price. If you have difficulty in making a choice, our experienced managers are always available and ready to provide advice. If you make an order you receive certified products that meet international quality standards in the shortest possible time. If you value your time, contact our nearest office today, or order online.