304 vs 316 Stainless Steel: Differences and Torx Screw Applications

304 vs 316 Stainless Steel: Differences and Torx Screw Applications

[Material Analysis] Stainless steel 304 and 316 are the two most common materials for torx screws. Correct selection is crucial for product quality.

Chemical Composition Comparison:

Element	304 (A2)	316 (A4)
Chromium (Cr)	18-20%	16-18%
Nickel (Ni)	8-10.5%	10-14%
Molybdenum (Mo)	None	2-3%
Carbon (C)	≤0.08%	≤0.08%

Performance Comparison:

• Corrosion Resistance: 316 > 304 (316 contains molybdenum, better pitting resistance)
• Strength: 304 tensile 520MPa, 316 tensile 540MPa
• Temperature Range: 304 (-196°C~800°C), 316 (-196°C~850°C)
• Price: 316 is 40-50% more expensive than 304

Application Recommendations:

✅ 304 Applications:

• Indoor dry environments
• General machinery
• Home appliances
• Food processing equipment (non-strong acid/alkali)
• Architectural decoration

✅ 316 Applications:

• Marine environments (ships, docks)
• Chemical equipment (acid/alkali resistance)
• Medical devices
• Food & beverage (high hygiene requirements)
• Outdoor high-corrosion environments

JiaLi Hardware provides both 304 and 316 material torx screws with material test reports available.