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Grade 03X23H6 refers to chromium-nickel-molybdenum steel of austenitic-ferritic class. Production is normalized by the following GOST: 5632−72, 7350−77 and TU: 14−1-1554−75, 14−1-1905−76. This steel is used for welded containers required in the production of nitric acid: 10% concentration at t ° 140 ° C; 20% HNO3 t ° to 120 ° C; 30% HNO3 t ° to 120 ° C; and 40−70% HNO3 to 100 ° C. It is also used in the production of ammonium nitrate, adipic acid, nitric fertilizers, pipelines for the transportation of nitrous gas from the compressor to the 1st and 2nd stage coolers (medium — nitrous gas, nitric acid, t ° <230 ° C, pressure up to 1.16 N / mm2). This steel successfully replaces the alloys OZH18H11, 03X19AGZN10, X18H9T and X18H10T, demonstrating greater resistance to knife corrosion of welded seams in comparison with titanium alloys: 08X22H6T, X18H10T, X18H9T.

Percentage composition

Mechanical properties at t=20°C

Mechanical properties at low as well as elevated tº (sheet 6 mm hardened in water at 1050°С)

Mechanical properties at high tº (sheet 6 mm, water hardened at 1050°C)

Physical properties at 20°C

density 7,7 g/cm3; thermal conductivity 0,168 — 10² W/(m — K); specific electrical resistance at 20 °C equals 0,74 Ohm — mm2/m elastic modulus at 20 °C = 20-x10−4 N/mm2; magnetic saturation in the field of 500 Ereaches 0.3−0.5 (Tl — m)/A; and the temperature coefficient of linear expansion α as the temperature rises from 20 °C to 100 °C, 200 °C and 300 °C is 9.6; 13.8 and 16x10−6/°C, respectively.

Corrosion resistance

According to GOST 7350−77, as well as TU 14−1-1905−76, this steel is resistant to intergranular corrosion by the method AM (duration of tests in the control solution of 24 hours), GOST 6032−89. When tested in boiling 65% HNO3 of particular purity, density 1.41 g/cm3, the rate of corrosion must not exceed 0.5 mm / year (the test includes 3 cycles of 48 hours each). Samples cut from sheets in quenched condition with an additional provoking heating to 550 °C for one hour are put to the test by both methods.

Process parameters

Hot deformation of this mild steel is carried out at higher temperatures than for other corrosion-resistant steels; namely in the temperature range of 1280−1110°C. The steel is well bendable and can be stamped both in cold and hot condition. Hardened in water at 1000−1050°C; the same heat treatment is recommended for deburring after cold or hot deformation.

Welding

Steel is well welded by all types of manual welding. For manual arc welding — best electrodes OZL-20. The strength of welds is not less than 90% of the base material with equal corrosion resistance. Welded joints do not require additional heat treatment, they are not prone to knife corrosion in boiling 65% HNO3.

Supply

All the presented 03Cr23N6 grade rolled steel is certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities; mechanical qualities 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.