Stainless steel 1.4404 vs 316: key differences
Jun 25, 2025
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When sourcing stainless steel for chemical processing, marine, food-grade, or pharmaceutical equipment, two common terms often appear in documentation: 1.4404 and 316. While they're frequently used interchangeably, they are not exactly the same-especially when technical requirements or compliance standards matter.
This article explains the key differences between stainless steel 1.4404 and 316, helping buyers choose the right material for performance, certification, and global sourcing.
What is 1.4404 and 316 Stainless Steel?
| Designation | Standard | Description |
|---|---|---|
| 1.4404 | EN 10088 (Europe) | Molybdenum-alloyed austenitic stainless steel with low carbon |
| 316 | ASTM A240 (USA) | AISI 316 refers to a general class of stainless with 2–3% Mo; carbon content may vary |
What is the equivalent of 1.4404 ?
| EU EN |
USA | Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Italy UNI |
China GB |
Sweden SS |
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| X2CrNiMo18-14-3 (1.4435) |
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1.4404 vs.316 Stainless Steel：Chemical Composition
| Element | 1.4401 / AISI 316 (%) | 1.4404 / AISI 316L (%) |
|---|---|---|
| C | ≤0.07 | ≤0.03 |
| Cr | 16.5–18.5 | 16.5–18.5 |
| Ni | 10.0–13.0 | 10.0–13.0 |
| Mo | 2.00–2.50 | 2.00–2.50 |
| Mn | ≤2.00 | ≤2.00 |
| Si | ≤1.00 | ≤1.00 |
1.4404 vs.316 Stainless Steel：Physical Properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 7.9–8.0 | g/cm³ | 20°C |
| Melting Point | 1370–1450 | °C | - |
| Thermal Conductivity | 15 | W/(m·K) | 20°C |
| Linear Expansion | 16.5×10⁻⁶ | 1/°C | 20–100°C avg. |
| Electrical Resistivity | 0.75×10⁻⁶ | Ω·m | 20°C |
| Elastic Modulus | 193–200 | GPa | 20°C |
Stainless steel 1.4404 vs 316: key differences
1. Carbon Content
1.4404 has a maximum carbon content of 0.03%, which minimizes the risk of intergranular corrosion during or after welding,Standard 316 (if not 316L) can have up to 0.08% carbon, making it more prone to sensitization if not post-weld treated.
2.Weldability
Thanks to its low carbon, 1.4404 is ideal for welded components like pressure vessels, piping, tanks, and food-grade equipment,Buyers working with welded assemblies should always confirm whether the 316 steel offered is 316L or not.
3. Standard Origin
1.4404 is classified under the European EN 10088 standard.
316 is under ASTM A240 or A276, commonly used in North America and international projects.
Is 1.4404 the same as 316?
Not exactly. 1.4404 is equivalent to 316L, the low-carbon version of 316. Standard 316 may have higher carbon and lower weld resistance.
Can I use 316 instead of 1.4404?
Yes-if you ensure it's 316L, not high-carbon 316. Always check the material certificate or UNS number (S31603 for 316L).
Need help choosing between 1.4404 and 316 stainless steel?
Gnee supplies 1.4404 stainless steel plates, tubes, and coils in strict compliance with EN 10088, ASTM A240, and ASME standards. We serve buyers in over 60+ countries, from OEMs to EPC contractors.
Contact Gnee for datasheets, pricing, and international delivery options tailored to your project.
Our Advantages:
Certified 1.4404 with EN 10204 3.1 MTC
Surface finishes: 2B, BA, No.4, mirror
Processing: plasma cutting, polishing, edge beveling
Global delivery with export packaging
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