Overview
904L Stainless Steel Seamless and ERW Pipe is made up of a nickel chromium alloy that has lower carbon content. The lower carbon content enables the pipes to be welded with ease without the risk of localized corrosion due to the reduced carbide precipitation during welding.
The higher contents of chromium and molybdenum used to alloy the SB677 904L Stainless Steel Pipe ensures that it has excellent performance, especially in corrosive environments. Into the bargain of having good resistance to dilute sulfuric acid, 904L indicates good resistance to other inorganic acids as well as many organic acids. For instance, the ASTM B677 specified SS 904L Tube has remarkable resistance properties to hot phosphoric acid. Produced under this specification, ASTM B677 TP904L could be produced either in a seamless, hot finished or cold worked condition. Typically, the tubes manufactured from ASTM B677 UNS NO8904 grade are designed to be used for general corrosive service.
Specification
ASTM B677-21 Standard Specification for Nickel-Iron-Chromium-Molybdenum and Iron-Nickel-Chromium-Molybdenum-Copper Seamless Pipe and Tube.
Specifications | ASTM B677 / ASME SB677 |
|---|---|
Dimensions | ASTM, ASME and API |
SS 904L Pipes | 1/2″ NB – 16″ NB |
ERW 904L Pipes | 1/2″ NB – 24″ NB |
EFW 904L Pipes | 6″ NB – 100″ NB |
Size | 1/8″NB TO 30″NB IN |
Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
Form | Round, Square, Rectangular, Hydraulic Etc |
End | Plain End, Beveled End, Treaded |
Equivalent Material Grade
STANDARD | WERKSTOFF NR. | UNS | JIS | AFNOR | BS | KS | EN |
|---|---|---|---|---|---|---|---|
SS 904L | 1.4539 | NO8904 | SUS 890L | Z2 NCDU 25-20 | 904S13 | STS 317J5L | X1NiCrMoCu25-20-5 |
Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
|---|---|---|---|---|---|---|---|---|---|---|
904L | Min | – | – | – | – | – | 19.0 | 4.00 | 23.00 | 1.00 |
Max | 0.20 | 2.00 | 1.00 | 0.045 | 0.035 | 23.0 | 5.00 | 28.00 | 2.00 | |
Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) | Brinell (HB) | ||||
|---|---|---|---|---|---|
| 904L | 490 | 220 | 35 | 70-90 Typical | – |
Physical Properties
Grade | Density | Elastic Modulus | Mean Co-eff of | Thermal Conductivity | Specific Heat | Elec Resistivity | |||
|---|---|---|---|---|---|---|---|---|---|
0-100°C | 0-315°C | 0-538°C | At 20°C | At 500°C | |||||
904L | 7900 | 190 | 15 | - | - | 11.5 | - | 500 | 952 |
Applications
1. Petroleum and petrochemical equipment.
2. Sulfuric acid storage and transportation equipment.
3. Power plant gas desulfurization equipment (absorption tower body, flue, door panel, internal parts, spray system).
4. Scrubbers and fans in organic acid treatment systems.
5. Seawater treatment devices, heat exchangers.
6. Paper industry equipment.
7. Sulfuric acid, nitric acid equipment, acid production.
8. Pharmaceutical industry and other chemical equipment, pressure vessels, food equipment.
