1.4539 ( 904L) and 1.4404 ( 316L) are both austenitic stainless steels, but they differ significantly in their alloy composition, corrosion resistance, and application fields.
While both are widely used in industries requiring corrosion-resistant materials, understanding their key differences is critical for selecting the right grade based on environmental conditions and cost-performance ratio.
What material is 1.4404 equivalent to?
The 1.4404 material equivalent is AISI 316L, also known as UNS S31603 and the European standard X2CrNiMo17-12-2. It is a low-carbon, austenitic stainless steel grade known for its excellent corrosion resistance, especially in chloride-containing environments, due to its molybdenum content.
What material is 1.4539 equivalent to?
904L stainless steel is one of the best stainless steel grade for corrosion resistance. This grade is written as 1.4539 or X1NiCrMoCu25-20-5 according to EN norm and it is written as UNS S08904 according to UNS norm.It can be processed into a variety of practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition and free samples, please contact our factory immediately.
1.4404 vs. 1.4539: chemical composition
|
Property |
1.4404 (316L) |
1.4539 (904L) |
Standard |
|---|---|---|---|
|
Chemical Composition (%) |
|||
|
Chromium (Cr) |
16.0 - 18.0 |
19.0 - 23.0 |
EN 10088-2 |
|
Nickel (Ni) |
10.0 - 14.0 |
23.0 - 28.0 |
EN 10088-2 |
|
Molybdenum (Mo) |
2.0 - 3.0 |
4.0 - 5.0 |
EN 10088-2 |
|
Nitrogen (N) |
≤ 0.10 |
≤ 0.02 |
EN 10088-2 |
|
Carbon (C) |
≤ 0.030 |
≤ 0.020 |
EN 10088-2 |
|
Manganese (Mn) |
≤ 2.0 |
≤ 2.0 |
EN 10088-2 |
|
Silicon (Si) |
≤ 1.0 |
≤ 1.0 |
EN 10088-2 |
1.4404 vs. 1.4539: Mechanical Properties
|
Mechanical Properties |
1.4404 (316L) | 1.4539 (904L) |
|
Tensile Strength (Rm) |
480 - 620 MPa |
490 - 690 MPa |
|
Yield Strength (Re 0.2%) |
≥ 170 MPa |
≥ 220 MPa |
|
Elongation (A) |
≥ 40% |
≥ 35% |
|
Hardness (HBW) |
≤ 217 |
≤ 230 |
1.4404 vs. 1.4539 Stainless Steel: Corrosion Resistance
Compared to 1.4404 (316L), 1.4539 (904L) exhibits significantly superior corrosion resistance, especially in corrosive environments such as sulfuric acid and high-chloride solutions. 1.4404 demonstrates good corrosion resistance under moderately corrosive conditions, while 1.4539 is specifically designed for highly corrosive applications.
1.4404 vs. 1.4539: Hardness
1.4539 is slightly harder than 1.4404, with 1.4539 having a typical hardness of ≤ 230 HB and 1.4404 at ≤ 215 HB. However, both are considered relatively soft compared to other stainless steel grades and are primarily valued for their corrosion resistance rather than high hardness.
1.4404 vs. 1.4539: Which stainless steel type is better for watches?
For watchmaking, 1.4539 (904L) is generally better than 1.4404 (316L) because its higher nickel and molybdenum content offers superior corrosion resistance, including resistance to chloride-induced pitting and stress corrosion cracking. While 1.4404 (316L) provides excellent corrosion resistance for general use and is a common choice, the enhanced alloying in 1.4539 makes it a more premium material for applications demanding exceptional durability and resistance to harsh environments, such as those involving exposure to salt water or aggressive chemicals, which is beneficial for watch casings.
What is the difference between 1.4539 and 1.4529?
1.4539 (Alloy 904L) is a good stainless steel, but 1.4529 (Alloy 926) is a more advanced, super-austenitic version with significantly better corrosion resistance, achieved by adding more Molybdenum (Mo) and Nitrogen (N) for superior pitting, crevice, and stress corrosion cracking resistance in aggressive chloride/acidic environments. Think of 1.4529 as the "next level up" from 1.4539, developed for even harsher conditions.
who choose us?
If you have project requirements for 1.4539 stainless steel bars, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.
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