Wire, circle, rod 03X18H11 - 1.4306 - aisi 304L

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

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Alloy 03X18H11 refers to chromium-nickel austenitic steels. It is melted in vacuum induction, open electric arc furnaces with the use of low-carbon ferroalloys, or by vacuum decarburization of the alloy, by gas-oxygen refining of liquid metal.

It is used in chemical engineering in the production of pipelines and capacitive welded equipment operating in contact with 70% nitric boiling acid, as well as in contact with adipic acid and ammonium nitrate. Welded joints of this alloy are not prone to knife corrosion. The recommended pressure of the medium is up to 5 N/mm², the operating range of welded structures at temperatures from -196 to 300 °C.

Technical specifications and GOSTs for the alloy grade 03X18H11

"Corrosion-resistant alloys and high-alloy, heat-resistant and heat-resistant steels. Grades" - GOST 5632-72;

"Forgings of corrosion-resistant alloys and steels. General Technical Conditions" - GOST 25 054-81;

"Forged square and round steel. Range" - GOST 1133-71;

"Corrosion-resistant thin-sheet, heat-resistant and heat-resistant steel. Technical conditions" - GOST 5582-75;

Technological Conditions: 14-1-1180-74; 14-1-1160-74; 14-1-2144-77 14-1-3071-80;; 14-1-2450-78; 14-1-3652-83; 14-4-3071-80; 14-1-490-72;

"Heat-resistant and heat-resistant alloys, corrosion-resistant and high-alloy steels. Grades." - GOST 5632-72;

"Forged square and round steel. Range." - GOST 1133-71;

"Steel shaped profiles of high accuracy. Technical conditions." - 14-11-245-88;

"Steel of calibrated section and corrosion-resistant, heat-resistant and heat-resistant. Technical Conditions" - GOST 5949-75.

Chemical composition

Fe Cr C Mn S P Ni Si
Osn. 17-19,0 ≤0,03 ≤2,0 ≤0,020 ≤0,035 10,5-12,5 ≤0,8

Mechanical characteristics of 03Cr18Ni11 grade at 20 °C.

Product Type Technical specifications, GOST σ0,2, N/mm² σc, N/mm² ψ, % δ5, %
rod 14-1-1160-74 200 500 40 50
Hot-rolled sheet 14-1-490-72 200 500 45 -
14-1-2144-77 200 500 40 -
14-1-3071-80 200 520 45 -
14-1-3071-80*1 176 470 40 -
Cold-rolled sheet 5582-75 200 500 40 -
14-1-1180-74 200 520 45 -
Cold rolled strip 14-1-3386-82 - 600-750 30 -
14-1-3652-83 - 540-720 37 -
Seamless tube 14-3-1401-86*1 186 460 45 -
Tube billet 14-1-3183-81*1 157 451 - -
14-1-3183-81*1 196 490 45 50

Mechanical characteristics of 03Cr18Ni11 steel at elevated and room temperatures (water quenched at 1100 °C, sheet 8 mm).

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

Mechanical characteristics of 03X18H11 steel at high temperatures (longitudinal sample, quenched in water from 1100 °C, sheet 8 mm).

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

Effect of hardening temperatures on mechanical characteristics of steel (sheet of Mechel OAO; 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, %
03CR18NI11 0,78 0,030 580/250 58 590/250 56 545/210 63 555/205 60
02CR18NI11 0,20 0,025 553/220 60 553/228 60 520/200 67 540/205 63

Physical characteristics

Alloys 02Cr18N11 and 03Cr18N11 must have resistance against intergranular corrosion at 650 °C after provoking tempering with an exposure time of 1 hour. During the test the DU method of GOST 6032-89 is used. So for steel 03X18N11 - corrosion rate must not be more than 0,5 mm / year, and for grade 02X18N11 - not more than 0,4 mm / year.

Application

Alloy 03Cr18N11 is recommended for use at a boiling point in nitric acid 70% concentration, at t ° 80-140 ° C in 45-80% concentration, adipic acid, ammonium nitrate, as well as in environments that contain nitrous gases at 80 ° C. Alloy 02Cr18N11 according to GIAP is recommended for production of heat exchangers, tail gas preheater, condenser-oxidizer.

The corrosion behavior of the alloy 02Cr18N1.

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

Welded specimens were tested under purge column operating conditions for nitric acid of weak concentration (temperature 130 °C, 56-60% HNO3, continuous 10 390 h).

Technological characteristics

The steel has good processability for plastic deformation in hot and cold state. The temperature range of hot deformation = 1100-900°C. The heating temperature of the ingot for rolling is 1240-1260°C. Softening heat treatment is used in order to remove the hardening at the end of plastic deformation. Hardening is carried out in water at 1040-1100 °C. The content of α-phase in the sheets must not exceed 0.5 points (according to GOST 11 876-66). Machining is at the level of Х18Н10Т steel.

Welding .

Grade 03X18N11 is well welded. When manual arc welding with electrodes brand OZL-22 with steel wire Sv-01H18N10. When automatic welding in shielding gas or submerged arc welding wire Св-01Х19Н9 or Св-01X18Н10 is used. In this case the corrosion resistance and strength of welded joints is not lower than that of base metal. Welded joints can be annealed to remove stresses without fear of their susceptibility to intergranular corrosion. The welded connections of 02X18N11, 03X18N11 grades in contrast to 08X18NYuT steel are not exposed to knife corrosion in the oxidizing environments. According to the conclusion of NIICHIMMASH the steel grade 02X18N11 and its welded joints have the same technological, corrosion and mechanical characteristics as the grade 0Х18Н11.

Delivery

All the presented 03Cr18Ni11 products are certified. The technical documentation includes data on chemical composition, limiting percentage of impurities and mechanical properties of the 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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Stainless steel alloys are always in stock of Evek GmbH at the best price. It is formed taking into account European rates for non-ferrous metals without additional costs. We deliver certified products of domestic and foreign producers. Our specialists will be happy to provide advice on purchasing any alloys, the correct choice of which will depend on the performance and durability of the equipment. We will help to determine not only the optimum parameters of the product, but also offer the best price.