03X18H11 - 1.4306 - aisi 304L pipe

Wire, circle, rod
Sheet, tape

International Equivalent

Mark Analogue W. Nr. Aisi Uns En Order
03Х18Н11 1.4306 304L X2CrNi19-11 Delivery from the stock, in stock

Relevance

Grade 03Cr18N11 refers to austenitic chromium-nickel steels. It is relevant in chemical engineering for the manufacture of welded containers and pipelines in contact with boiling 70% nitric acid, 45−80% HNO3 at t ° 80−140 ° C, as well as for parts resistant to adipic acid, ammonium nitrate in the environment of nitrous gases, at t ° above 80 ° C. The welded joints of this steel are resistant to knife corrosion and can withstand pressures up to 5 N/mm². The temperature range of welded structures: from -196 ° C to +300 ° C.

Production

Steel is melted in open electric arc furnaces, vacuum induction furnaces and low-carbon ferroalloys are used. Also used methods of gas-oxygen refining of liquid metal and vacuum decarburization of the melt in the ladle. The following State standards are provided for 03Cr18H11 alloy: 1133−71; 5582−75; 25,054−81; 5632−72 and TU: 14−1-1160−74; 14−1-1180−74; 14−1-2144−77; 14−1-2450−78; 14−1-3071−80; 14−1-3652−83; 14−1-490−72; 14−4-3071−80.

Percentage composition

C Cr Si Mn Ni P S Fe
≤0,03 17−19 ≤0,8 ≤2 10,5−12,5 ≤0,035 ≤0,02 Basis

Mechanical properties at t ° 20 ° C

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

*1 Steel grade 02Х18Н11.

Mechanical properties of 03Cr18Ni11 steel at room temperature as well as at elevated tº (sheet size 8 mm, 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, %
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 03Cr18Ni11 steel at high tº (8 mm sheet, hardening process in water at 1100 °C, longitudinal sample)

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 hardening t on mechanical properties of alloys (sheet of Mechel OAO; data according to GIAP)

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 0,2 0,025 553/228 60 553/220 60 540/205 63 520/200 67
03CR18NI11 0,78 0,03 590/250 56 580/250 58 555/205 60 545/210 63

Physical properties

Steel is resistant to intergranular corrosion after provoking tempering (1 hour at t° 650°C). Tests according to DU GOST 6032−89. The corrosion rate must not exceed 0,5 mm/year in 03Cr18Ni11 and 0,4 mm/year in 02Cr18Ni11.

Corrosion behavior of 02Cr18Ni11 steel

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

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

Technological parameters of treatment

Temperature of ingot heating for rolling 1240−1260°С. The temperature range of hot deformation of semi-finished products is 1100−900°C. Softening heat treatment is applied for removing build-up after cold or hot deformation. Hardening is carried out in water at 1040−1100°C. The machinability is the same as for Cr18Ni10T steel. The content in the sheets of α-phase — no more than 0.5 points.

Weldability .

The weldability is good. When manual arc welding electrodes OZL-22 with wire brand Sv-01Cr18N10 are used. When an automatic submerged-arc welding or welding in shielding gas using wire Св-01X18Н10 (Св-01Х19Н9). It should be noted that according to the conclusion of NIICHIMMASH corrosion resistance and strength of welded joints in this case is not lower than that of the base metal. Unlike 08X18NYuT, welded joints of 03X18N11 and 02X18N11 steels are resistant to knife corrosion in oxidizing media. Welded joints of these steels can be annealed to remove stresses, with no fear of their tendency to intergranular corrosion.

Supply

All the presented 03Cr18N11 grade rolled steel is certified. 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.

Buy at the best price

Evek GmbH has a diverse range of stainless alloys in stock. We supply certified products of domestic and foreign manufacturers. Our staff is always happy to assist you with qualified assistance in choosing metal products. We have some of the most experienced consulting managers. Strict adherence to production standards, excellent product quality and minimal lead time are the face of our company. Discount discounts have been introduced for regular customers.