|
Weight % |
Cmax |
Cr |
Ni |
Mo |
Cu |
PRENmin |
|
904L |
0.020 |
19.5-20.5 |
24.0-26.0 |
4.0-4.5 |
1.2-2.0 |
35.0 |
|
EN 1.4539 |
0.020 |
19.0-21.0 |
24.0-26.0 |
4.0-45.0 |
1.2-2.0 |
35.0 |
|
UNS N08904 |
0.020 |
19.0-23.0 |
23.0-28.0 |
4.0-5.0 |
1.2-2.0 |
35.0 |
Chemical Composition
Typical Mechanical Properties
|
Material |
Form and Condition |
Tensile Strength MPa |
Yield Strength (0.2% Offset) MPa |
Elongation 4D(%) |
Hardness HB |
||
|
|
|
Ksi |
MPa |
Ksi |
MPa |
|
|
|
904L |
Annealed |
|
490 |
|
220 |
35 |
≤ 150 HB |
|
EN 1.4539 |
Annealed |
|
|
|
|
|
|
|
UNS N08904 |
Annealed |
|
|
|
|
|
- |
Standard
|
Pipe Seamless |
ASTM A312 |
|
Pipe Welded |
ASTM A358,ASTM B673 |
|
Tube Seamless |
ASTM A269 |
|
Tube Welded |
EN 10217-7，EN 10296-2，ASTM A249，ASTM A269，ASTM B674 |
Applications
• Chloride containing environments
• Heat exchanger tubes
• Pipe systems within
• Chemical and Petrochemical
• Hydrometallurgy
Material Summary
904L is an austenitic stainless steel. Though notably softer than 316L, its molybdenum addition gives it superior resistance to localized attack (pitting and crevice corrosion) by chlorides and greater resistance reducing acids and in particular its copper addition gives it useful corrosion resistance to all concentrations of sulphuric acid. Its high alloying content also gives it greater resistance to chloride stress corrosion cracking, but it is still susceptible. Its low carbon content makes it resistant to sensitization by welding and which prevents intergranular corrosion
