316L vs 304 Stainless Steel: Similar austenitic grades — 316L adds Mo for chloride resistance
316L vs 304 Stainless Steel
Side-by-side chemical composition and mechanical property comparison.
Overview
316L
1.4404
Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
304 Stainless Steel
1.4301
The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
| 316L | 304 Stainless Steel | |
|---|---|---|
| Material Number | 1.4404 | 1.4301 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10088-2 |
Chemical composition (wt%)
| Element | 316L | 304 Stainless Steel | Overlap |
|---|---|---|---|
| C | 0–0.03% | 0–0.07% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| P | 0–0.045% | 0–0.045% | OK |
Mechanical properties
| Property | 316L | 304 Stainless Steel | Unit |
|---|---|---|---|
| tensile_strength | 520–680 | 520–720 | MPa |
| yield_strength | ≥ 220 | ≥ 210 | MPa |
| elongation | ≥ 40 | ≥ 45 | % |
Compatibility Assessment
316L contains 2.0-2.5% molybdenum which 304 lacks, providing superior chloride pitting resistance. 316L also has lower carbon (0.03% max vs 0.07%) reducing sensitization risk.
Frequently Asked Questions
Is 316L the same as 304 Stainless Steel?
316L and 304 Stainless Steel have a 85% composition overlap. Similar austenitic grades — 316L adds Mo for chloride resistance
Can I replace 316L with 304 Stainless Steel?
In many cases, yes. The compositions overlap significantly (85%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between 316L and 304 Stainless Steel?
The main differences are in the following elements: Cr, Ni. 316L is a Stainless Steel grade, while 304 Stainless Steel is a Stainless Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.