1.4401 stainless steel vs 1.4408
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When selecting stainless steel for industrial applications, understanding the differences between EN 1.4401 (AISI 316) and EN 1.4408 (Cast 316 stainless steel) is critical to ensure optimal performance, cost-effectiveness, and long-term reliability. Though chemically similar, these two materials differ significantly in form, mechanical properties, and applications.
What is 1.4401 equivalent to?
The 1.4401 and 1.4404 stainless steel types are also known as 316 and 316L grades, respectively. The 316 grade is an austenitic stainless steel that is second only to 304 in commercial importance.
What is 1.4408 equivalent to?
1.4408 is also known as 3l6LSi grade or GX5CrNiMo19-11-2 cast stainless steel. It is equivalent to several other material grades. Common equivalent materials include ASTM A351 CF8M, ASTM A743 CF8M, ASTM A744 CF8M, AISI 316, and JIS SCS14A.
1.4401 stainless steel vs 1.4408 Chemical Composition
Both 1.4401 and 1.4408 belong to the family of molybdenum alloyed austenitic stainless steels, 1.4408 is a cast version of 316L with the addition of silicon.
| Element | 1.4401 (Wrought) | 1.4408 (Cast) |
|---|---|---|
| Carbon (C) | ≤ 0.07% | ≤ 0.08% |
| Chromium (Cr) | 16.5–18.5% | 18.0–20.0% |
| Nickel (Ni) | 10.0–13.0% | 9.0–11.0% |
| Molybdenum (Mo) | 2.0–2.5% | 2.0–2.5% |
| Silicon (Si) | ≤ 1.0% | ≤ 1.0% |
1.4401 stainless steel vs 1.4408：Mechanical Properties
1.4401 offers better ductility, elongation, and impact resistance, making it ideal for pressure-bearing applications or where deformation occurs.
| Property | 1.4401 (Wrought Steel) | 1.4408 (Cast Steel) |
|---|---|---|
| Tensile Strength (MPa) | 500–700 | 440–640 |
| Yield Strength (MPa) | ≥ 200 | ≥ 200 |
| Elongation (%) | ≥ 40 | ~25 |
| Impact Toughness | Excellent | Moderate |
Corrosion Resistance
1.4401 generally has a finer, more uniform grain structure and fewer casting defects, and slightly better corrosion resistance in strict hygiene requirements or high pressure environments. 1.4408 has enhanced corrosion resistance and better weldability due to low carbon and silicon.
Weldability and Machinability
1.4401: Easily welded using all standard methods (TIG, MIG), low risk of hot cracking
1.4408: Can be welded but often requires preheating or post-weld treatment due to casting structure
Machining: 1.4401 is easier to machine due to its consistent microstructure, while 1.4408 requires careful tool selection and slower speeds.
At GNEE, we supply both EN 1.4401 stainless steel pipes and sheets and custom 1.4408 cast stainless steel parts with:
1.Fast Delivery: Gnee stocks common sizes for immediate shipment. Custom-sized pipes can be delivered in as little as 7-15 days to meet tight project deadlines.
2.Export-grade packaging: Pipes are packed in waterproof plastic film, woven bags or plywood boxes and reinforced with steel straps.
3.Full Certification: All products come with EN 10204 3.1 / 3.2 mill test certificates, certificates of origin and third-party inspection reports (e.g. SGS, BV).
4.Value-added Processing: Optional services include cutting, grooving, bending, drilling, laser marking and polishing, helping buyers reduce secondary processing time and costs.
