Composition
Table 1. Composition ranges for 904L grade of stainless steels.
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu | |
904L | min.max. | -0.020 | -2.00 | -1.00 | -0.045 | -0.035 | 19.023.0 | 4.05.0 | 23.028.0 | 1.02.0 |
Mechanical Properties
Table 2. Mechanical properties of 904L grade stainless steels.
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 | – |
Rockwell Hardness value range is typical only; other values are specified limits. | |||||
Physical Properties
Table 3. Typical physical properties for 904L grade stainless steels.
Grade | Density(kg/m3) | Elastic Modulus(GPa) | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity(W/m.K) | |||
0-100°C | 0-315°C | 0-538°C | At 20°C | At 500°C | |||
904L | 8000 | 200 | 15 | – | – | 13 | – |
Grade Specification Comparison
Table 4. Grade specifications for 904L grade stainless steels.
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
904L | N08904 | 904S13 | – | 1.4539 | X1NiCrMoCuN25-20-5 | 2562 | – |
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. | |||||||
Possible Alternative Grades
Table 5. Possible alternative grades to 904L stainless steel.
Grade | Why it might be chosen instead of 904L |
316L | A lower cost alternative, but with much lower corrosion resistance. |
6Mo | A higher resistance to pitting and crevice corrosion resistance is needed. |
2205 | A very similar corrosion resistance, with the 2205 having higher mechanical strength, and at a lower cost to 904L. (2205 not suitable for temperatures above 300°C.) |
Super duplex | Higher corrosion resistance is needed, together with a higher strength than 904L. |
SUS904L Stanless Steel Pipe | |
STANDARDS | WELDED |
ASTM | B 673 |
ASME | SA 673 |
PRODUCT NAME | ASTM B673 SUS904L Stanless Steel Pipe |
RANGE | 6NB to 1200NB – SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS. |
TYPE | Round, Square, Rectangle, Hydraulic, Honed Tubes |
