Stainless Steel UNS N08904 Fabricated Pipes
N08904 stainless steel pipe is a high-alloy austenitic stainless steel with low carbon content and has good corrosion resistance. It has good corrosion resistance against dilute sulfuric acid. At the same time, it has a high chromium content and sufficient nickel content. The addition of copper makes it highly acid-resistant, especially highly resistant to chloride gap corrosion and stress corrosion cracking, and is less prone to corrosion spots and cracks. , the resistance to pitting corrosion is slightly better than other steel types. In addition, N08904 acid-resistant steel pipe has good processability and weldability and can be used in pressure vessels.
The physical properties of N08904 stainless steel round pipe are worth noting: the density is 8.0kg/dm3, the melting point is unknown, the specific heat capacity is kg/(kg.k) at 0~100℃, and the thermal conductivity is at 100℃ and 500℃ respectively. w/(m.k), the linear expansion coefficient is 10-6/k at 0~100℃ and 0~539℃ respectively, the resistivity (20℃) is Ω.mm2/m, and the longitudinal elastic modulus (20℃) is GPa, while N08904 stainless steel seamless steel pipe is non-magnetic.
The standards are: UNSN08904 | 1.4539 | ASTM A240 | ASME SA240 | 904L super stainless steel | JIS standard SUS 890L.
Stainless Steel UNS N08904 Pipes Equivalent Grades
| Grade | 904L | |
| UNS No | N08904 | |
| Old British | BS | 904S13 |
| En | X1NiCrMoCu25-20-5 | |
| Euronorm | No | 1.4539 |
| Name | – | |
| Swedish SS | – | |
| Japanese JIS | SUS 890L | |
ASTM A312 UNS N08904 Pipes Mechanical Properties
| Grade | UNS N08904 | |
|---|---|---|
| Tensile Strength (MPa) min | 490 | |
| Yield Strength 0.2% Proof (MPa) min | 220 | |
| Elongation (% in 50mm) min | 35 | |
| Hardness | Rockwell B (HR B) max | 70-90 typical |
| Rockwell B (HR B) max | – | |
Stainless Steel UNS N08904 Seamless Pipes
N08904 Stainless Steel Thick Wall Pipe is suitable for various environments with harsh corrosive conditions. It has good activation-passivation transition ability and excellent corrosion resistance. It has good corrosion resistance in non-oxidizing acids such as H2SO4, CH3COOH, HCOOH, and H3PO4, and has good pitting corrosion resistance in neutral chlorine-containing media. It also has good resistance to crevice corrosion and stress corrosion. performance. It is suitable for various concentrations of H2SO4 below 70°C. It can withstand any concentration and temperature of CH3COOH under normal pressure and has good corrosion resistance in mixed acids of HCOOH and CH3COOH.
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