Overview
ASME SA213 Grade 904L stainless steels have exceptional resistance to chloride attack and warm seawater. 904L Tubing offer excellent oxidation resistance, it can be solution heat-treated at 1090 Degree C to 1175 Degree C, after rapid cooling. Welding of Grade 904L SS Tubes can be carried out using all conventional procedures. Also referred as UNS NO8904 Pipes, they are high purity steels by means of low content in sulphur. 904l stainless tubes does not need post-weld and pre-heat heat conducts. Meanwhile, thermal treatment is suitable for hardening these grades. On the other hand, the structural constancy of stainless steel 904L collapses at soaring temperatures, mainly beyond 400 Degree C. This UNS NO8904 Tubes needs to be solution canned after cold working, for to attain maximum SCC resistance under severe atmospheres.
Specification
ASTM A213/A213M-21a Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
Specifications | ASTM A/ASME SA213 / A249 / A269 |
Dimensions | ASTM, ASME and API |
SS 904L Tubes Size | 10.29 OD (mm) – 762 OD (mm) |
Thickness | 0.35 OD (mm) to 6.35 OD (mm) in thickness ranging from 0.1mm to 1.2mm. |
Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
Type | Seamless / ERW / Welded / Fabricated |
Form | Round Tubes, Custom Tubes, Square Tubes, Rectangular Tubes, “U” Shape, Hydraulic Tubes |
Length | Single Random, Double Random & Cut Length. |
End | Plain End, Beveled End, Treaded |
Equivalent Grades for Stainless Steel TP 904L Seamless Tubes:
STANDARD | SS 904L |
WERKSTOFF NR. | 1.4539 |
UNS | N08904 |
JIS | SUS 904L |
BS | 904S13 |
GOST | STS 317J5L |
AFNOR | Z2 NCDU 25-20 |
EN | X1NiCrMoCu25-20-5 |
Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
SS 904L | 0.020 max | 2.00 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 23.00 – 28.00 | 1.00 – 2.00 |
Mechanical Properties
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
Physical Properties
Grade | Density | Elastic Modulus | Mean Co-eff of | Thermal Conductivity | Specific Heat 0-100°C | 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. Chemical Processing
2. Food Processing – equipment and storage
3. Petroleum Refining – fluid catalytic cracking units, polythionic acid service
4. Pharmaceutical Production
5. Waste Heat Recovery – recuperators
6. Wiring in electrostatic precipitators
7. Oil refinery components
8. Seawater cooling devices
9. Gas scrubbing plants
10. Pulp and paper processing industries
11. Acetic, phosphoric and sulphuric acid processing plants
