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SUPER AUSTENITIC 904L - N08904 - 1.4539 - X1NiCrMoCu25.20.5 - URANUS B6
PREN = minimum 32.2 - 39.9
CERTIFICATION: ASTM – EN – NORSOK – NACE - WN
TEST ON REQUEST: X-RAY, DP, PMI, ULTRASONIC, CORROSION (G48 A/B or others)
Stainless steel, acier inoxydable, rostfreier Stahl, Aco Inoxidável, Acero Inoxidables, Roestvrij staal, paslanmaz çelik, Нержавеющих сталей, ανοξείδωτο χάλυβα, rostfritt stål, nerez, stali nierdzewnej
We can offer these materials in commercial dimensions or cut to size required (cutting by shearing, plasma, laser and waterjet with working stroke 3000x6750 max thk. 200 mm and 5 axis cut).
We also supply welded and machining construction according to drawing and welded tubes in all dimensions.
Besides, we can provide non-commercial sizes and dimensions from steelwork according to customers' specifications and to special delivery and price conditions.
Properties
Austenitic chromium-nickel-molybdenium-cooper with low carbon content which resists intergranular corrosion in the temperature range up to 400 °C.
No post-weld heat treatment required.
Possesses a very good reistance to sulphuric acid of any concentration up to about 60° C, as well as to phosphoric acid and organic acids.
Excellent reistance to stress corrosion cracking, and pitting and crevice corrosion in media containing chloride ions.
For optimium resistance, surfaces should be pickled.
Application
Production of sulphuric, phosphoric and acetic acids. petrolchemical industry, artificial fertalizers, food processing and pharmaceutical indistries, seawater desalinization plants.
Chemical composition
(average %)
| C | Si | Mn | Cr | Mo | Ni | Cu | N |
| 0,020 | 0,50 | 0,75 | 20,30 | 4,50 | 25,10 | 1,50 | 0,06 |
Standards
| DIN | AFNOR | UNS | SIS |
| 1.4539 X1NiCrMoCu25-20-5 |
Z2NCDU25-20 | N08904 | 2562 |
Hot forming
Forging:
1200 to 900°C
Air cooling
Heat treatment
1050 to 1100°C
Water, air cooling (thickness below 2 mm)
Structure
Austenite
Welding
Weldability is good.
Thin electeodeand wire diameters and low amperage should be used to keep heat input below.
Avoid weaving.
Cool bead to at tempearure below 100°C prio to depositing the next pass.
No post-weld treatment required.
Mechanical properties at room temperature
Condition: solution quenched
| Product | Dimensions | 0.2% proof stress | 1% proof stress |
Tensile strenght |
Elongation A5 | Impact strenght (ISO-V) |
||||
| mm | N/mm² min | N/mm² min | N/mm² | L | Q | T | L | Q | T | |
| BI | < 30 | — | 35 | — | — | 55 | — | |||
| St.Sch | < 160 | 220 | 250 | 520-720 | 40 | — | — | 85 | — | — |
| St = Bars Sch = Forgings BI = Sheet or Plate L = Longitudinal Q = Transverse T = Tangential |
The values for others products and dimensions shall be establishedin accordance with relevant specifications by agreement. |
High - Temperature properties
| Temperature |
50°C
|
100°C
|
150°C
|
200°C
|
250°C
|
300°C
|
350°C
|
400 °C
|
| 0.2% proof stress N/mm² min |
190
|
175
|
165
|
155
|
145
|
135
|
130
|
125
|
| 1% proof stress N/mm² min |
220
|
205
|
195
|
185
|
175
|
165
|
160
|
155
|
Physical properties
| Density at |
20°C
|
8.00 g/dm |
| Thermal conductivity at | 20°C | 12 W/(mK) |
| Specific heat at | 20°C | 0.45 J/(gK) |
| Electric resistivity at | 20°C | 1.00 Ohm mm/m |
| Modulus of elasticity at | 20°C | 197 x 10 N/mm |
| Magnetic properties | Can be slightly magnetic | |
| Thermal expansion between 20°C e ...°C 10 m/(mK) |
Temperature
|
10 m/(mK) |
| 100°C | 15.8 | |
| 200°C | 16.1 | |
| 300°C | 16.5 | |
| 400°C | 16.9 | |
| 500°C | 17.3 |
| Modulus of elasticity, 10 N/mm at |
Temperature
|
10 N/mm |
| 20°C | 197 | |
| 100°C | 191 | |
| 200°C | 184 | |
| 300°C | 177 | |
| 400°C | 170 | |
| 500°C | 163 |