Stainless steel 1.4539, X1NiCrMoCu25-20-5, AISI 904L, N08904 resistant to pitting corrosion and stress corrosion according to EN 10088-1, ASTM A182.
| Standards | Steel Grades | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | Ti: | Cu: | N: | |
| 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 | |
| PN | 0H22N24M4TCu | ||||||||||
| <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, X1NiCrMoCu25-20-5, AISI 904L - specification and application
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.
Mechanical and physical properties of 1.4539, X1NiCrMoCu25-20-5, AISI 904L at room temperature:
- Tensile strength, Rm = 530 - 570 MPa
- Yield point, Rp0,2: >230 MPa
- Elongation, A: >35%
- Modulus of elasticity,E: 195 GPa
- Heat capacity, cp20℃= 450 J * kg-1 * K-1
- Heat conductivity, λ: 12 W * m-1 * K-1
- Linear Expansion Factor, α20℃=15,8 * 10-6 K-1
- Specific resistance: 1 Ω * mm2/m
- Hardness: <230 HB
Mechanical properties of light bars according to EN 10088-5 +2H, +2B, +2G, +2P
- Dimensions <16mm
- Tensile strength, Rm: 600 - 930 MPa
- Yield point, Rp0,2: >400 MPa
- Elongation, A: >20%
- Dimensions 16-63mm
- Tensile strength , Rm: 530 - 880 MPa
- Yield point, Rp0,2: >230 MPa
- Elongation, A: >25%
- Dimensions >63mm
- Tensile strength, Rm: 530 - 730 MPa
- Yield point, Rp0,2: >230 MPa
- Elongation, A: >35%
Mechanical properties of seamless tubes 1.4539 according to EN 10216-5 in +AT condition
- Tensile strength, Rm: 520 - 720 MPa
- Yield point, Rp0,2: >230 MPa
- Properties of longitudinal samples:
- Impact resistance, KV20℃: >120J
- Elongation, A: >35%
- Properties of transverse samples:
- Impact resistance, KV20℃: >90J
- Impact resistance, KV-196℃: >60J
- Elongation, A: >30%
Mechanical properties of wires for springs according to EN 10270-3
- Dimensions: <0.2mm - Tensile strength, Rm: 1600 - 1840 MPa
- Dimensions: 0.20-0.40mm - Tensile strength, Rm: 1550 - 1790 MPa
- Dimensions: 0.40-0.50mm - Tensile strength, Rm: 1500 - 1750 MPa
- Dimensions: 0.50-0.80mm - Tensile strength, Rm: 1450 - 1670 MPa
- Dimensions: 0.80-1.00mm - Tensile strength, Rm: 1400 - 1610 MPa
- Dimensions: 1.00-1.50mm - Tensile strength, Rm: 1350 - 1560 MPa
- Dimensions: 1.50-4.25mm - Tensile strength, Rm: 1300 - 1500 MPa
- Dimensions: 4.25-6.00mm - Tensile strength, Rm: 1250 - 1440 MPa
- Dimensions: 6.00-7.00mm - Tensile strength, Rm: 1200 - 1380 MPa
- Dimensions: 7.00-8.50mm - Tensile strength, Rm: 1150 - 1330 MPa
Mechanical properties of 1.4539, X1NiCrMoCu25-20-5, AISI 904L at elevated temperatures:
Yield point at elevated temperatures:
- temp. 50℃ - Rp0,2: >205 MPa
- temp. 100℃ - Rp0,2: >205 MPa
- temp. 150℃ - Rp0,2: >190 MPa
- temp. 200℃ - Rp0,2: >175 MPa
- temp. 250℃ - Rp0,2: >160 MPa
- temp. 300℃ - Rp0,2: >145 MPa
- temp. 350℃ - Rp0,2: >135 MPa
- temp. 400℃ - Rp0,2: >125 MPa
- temp. 450℃ - Rp0,2: >115 MPa
- temp. 500℃ - Rp0,2: >110 MPa
- temp. 550℃ - Rp0,2: >105 MPa
Linear Expansion Factor at elevated temperatures α:
- temp. 100℃ - α: 15,8 * 10-6 K-1
- temp. 200℃ - α: 16,1 * 10-6 K-1
- temp. 300℃ - α: 16,5 * 10-6 K-1
- temp. 400℃ - α: 16,9 * 10-6 K-1
- temp. 500℃ - α: 17,3 * 10-6 K-1
Modulus of elasticity at elevated temperatures, E:
- temp. 100℃ - E: 190 GPa
- temp. 200℃ - E: 182 GPa
- temp. 300℃ - E: 174 GPa
- temp. 400℃ - E: 166 GPa
- temp. 500℃ - E: 158 GPa
In the above mentioned grades the company provides:
- Peeled and drawn bars 1.4539, X1NiCrMoCu25-20-5, AISI 904L
- Forgings and forged bars 1.4539, X1NiCrMoCu25-20-5, AISI 904L
- Hot-rolled and cold-rolled sheets 1.4539, X1NiCrMoCu25-20-5, AISI 904L
- Seamless and seamed tubes 1.4539, X1NiCrMoCu25-20-5, AISI 904L
- Drawn wires 1.4539, X1NiCrMoCu25-20-5, AISI 904L
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.