|Chemical Composition %|
|EN||1.4539 - X1NiCrMoCu25-20-5 - X 1 NiCrMoCu 25-20-5|
|<0.02||<2.0||<0.7||<0.030||<0.010||19.0 - 21.0||24.0 - 26.0||4.0 - 5.0||-||1.2 - 2.0||<0.15|
|ASTM||UNS N08904 - N 08904 - AISI 904L - AISI 904 L|
|<0.02||<2.0||<1.0||<0.045||<0.035||19.0 - 23.0||23.0 - 28.0||4.0 - 5.0||-||1.0 - 2.0||<0.1|
|<0.06||1.2 - 2.0||<1.0||<0.045||<0.030||20.0 - 22.0||24.0 - 26.0||4.0 - 5.0||<0.7||1.3 - 1.8||-|
|AFNOR||Z2NCDU25-20 - Z 2 NCDU 25-20 - Z2NCDU2520|
|<0.02||<2.0||<0.4||<0.035||<0.010||19.0 - 21.0||24.0 - 26.0||4.0 - 5.0||-||1.0 - 2.0||-|
|BS||904S13 - 904 S 13|
|<0.03||<2.0||<1.0||<0.040||<0.025||19.0 - 22.0||24.0 - 27.0||4.0 - 5.0||-||1.0 - 2.0||-|
|JIS||SUS 317 J5L TK - SUS 317 J5L TP - F SUS 317 J5L|
|<0.02||<2.0||<1.0||<0.045||<0.030||19.0 - 23.0||23.0 - 28.0||4.0 - 5.0||-||1.0 - 2.0||-|
1.4539 is a grade of super austenitic steel, partially classified as nickel alloys. Provided in the form of long and flat products, it is used mainly in the chemical, energy and petrochemical industries, showing resistance to various concentrations at high temperatures of sulfuric acid, phosphoric acid, nitric acid and orthophosphoric acid.
904L and its substitutes belong to the group of steels resistant to intercrystalline corrosion in delivery and sensitized condition, which goes hand in hand with resistance to pitting and stress corrosion. In addition, it is characterized by increased slit and pitting corrosion resistance, and good weldability. in the manner of TMT, the supersaturation is carried out at temperatures of 1050 - 1150 ℃ and forging and rolling at 900 - 1200 ℃.
Thanks to the high content of Nickel and Chromium, steel in difficult environments significantly reduces the progress of corrosion, with the high density of Chromium and Molybdenum facilitating the passivation of metal surfaces and improving the mechanical properties of the products. In addition, the high concentration of copper contributes to the increase of steel resistance to reducing gases, improving plasticity and resistance to acids.
1.4539 is one of the best acid-resistant austenitic grades that is an alternative to 1.4547 and 1.4529 steels. Comparable corrosion resistance up to 904L has duplex steels with a ferritic-austenitic structure of 1.4462 / X2CrNiMoN22-5-3 / UNS S31803 and S32205, but their increased mechanical properties may in certain situations limit the use of materials, f.ex. lower plasticity. In some applications, the austenite structure is irreplaceable.
In addition to the aforementioned applications and environmental resistance, the grade well tolerates the presence of formic acid, acetic acid, oxalic acid, citric acid, lactic acid, high concentrations of salt solutions, nitrates, chlorides, hydrogen sulfide, hydrogen chloride, seawater, acetate and sulphate. The material with a given chemical composition can work at elevated temperatures up to approx. 400 ℃.
This grade of steel is used for the production of systems and equipment for the desalination of water, equipment and machinery in the food, cryogenic and pharmaceutical industries, the production of scrubbers in coal-fired power plants, condensers, exhaust purification filters, heat exchangers for sea water cooling, shipbuilding, offshore and chemical pipelines, in the steel industry, for paper whitening machines in the cellulose industry.
Yield point at elevated temperatures:
Linear Expansion Factor at elevated temperatures α:
Modulus of elasticity at elevated temperatures, E:
The other alternatives and substitutes:
00Cr20Ni25Mo4.5Cu, 015Cr21Ni26Mo5Cu2, UNS N08904, Z2NCDU25-20, 904S13, KO44ELC, KO 44 ELC, STS 890 L, SUS 890L, TP904L, SA5.9, 0H22N24M4TCu, 00H22N24M4Cu, 0H23N28M3TCu, SUS 317 J5L TK, 00H23N28M3Cu, 03ChN28MDT, 03ХН28МДТ, 06ChN28MDT, 06ХН28МДТ, EP516, ЭП516, 01Ch23N28M3D3T, 01Х23Н28М3Д3Т, EI943, ЭЛ943, 0Ch23N28M3D3T, 0Х23Н28М3Д3Т, UNS N08904, 904L, 904S13, 1.4539, X1NiCrMoCu25-20-5, Z2NCDU25-20.