904L stainless steel is a super austenitic stainless steel. It belongs to the category of high alloy stainless steel and contains a large amount of alloy elements. The combination of these alloy elements gives it excellent corrosion resistance and other excellent properties.
904l stainless steel manufacturer-GNEE
The following is an equivalent standard grades of 904L stainless steel:
| Standard |
Equivalent Grade |
| ASTM |
A240 / A276 / A312 / A493 (UNS N08904) |
| EN / DIN |
1.4539 (X1NiCrMoCu25-20-5) |
The following are the main international standards for 904L stainless steel (UNS N08904) in different product forms (tubes, plates, bars):
| Product Form |
ASTM Standard |
EN/DIN Standard |
JIS Standard |
Other Standards |
| Plate/Sheet |
ASTM A240, ASTM A480 |
EN 10088-2 (1.4539) |
JIS G4304 (SUS 890L) |
ISO 15510 (904L) |
| Pipe/Tube |
ASTM A312, ASTM A269, ASTM A213 |
EN 10216-5, EN 10217-7 (1.4539) |
JIS G3459 (SUS 890L) |
GOST 9941-81 (06ХН28МДТ) |
| Bar/Rod |
ASTM A276, ASTM A479 |
EN 10088-3 (1.4539) |
JIS G4303 (SUS 890L) |
GOST 5949-75 (06ХН28МДТ) |
Chemical Composition of 904 Stainless Steel (wt%)
| Element |
Range/Value |
| Chromium (Cr) |
19.0 – 23.0% 12 |
| Nickel (Ni) |
23.0 – 28.0% 12 |
| Molybdenum (Mo) |
4.0 – 5.0% 13 |
| Copper (Cu) |
1.0 – 2.0% 12 |
| Carbon (C) |
≤0.02% 12 |
| Manganese (Mn) |
≤2.00% 12 |
| Silicon (Si) |
≤1.00% 12 |
| Phosphorus (P) |
≤0.045% 12 |
| Sulfur (S) |
≤0.035% 12 |
| Iron (Fe) |
Balance 12 |
Mechanical Properties of 904 Stainless Steel
| Property |
Value/Range |
| Tensile Strength |
≥490 – 550 MPa 16 |
| Yield Strength |
≥205 – 216 MPa 16 |
| Elongation |
≥35% 12 |
| Hardness (HRB) |
≤90 12 |
| Density |
7900 – 8240 kg/m³ 16 |
| Elastic Modulus |
190 GPa |
Note:
The high nickel and molybdenum content enhances corrosion resistance in acidic and chloride-containing environments
The alloy exhibits fully austenitic microstructure, ensuring stability against phase precipitation
Compared with 725LN stainless steel, 904L stainless steel focuses on corrosion resistance. In terms of composition, 904L has lower carbon content, slightly lower chromium content, but higher nickel content. In addition, the addition of copper further enhances its corrosion resistance, especially in acidic and chloride-containing environments. In terms of physical properties, 904L stainless steel has a higher density and relatively lower mechanical properties, but performs better in extreme corrosive environments.
