Austenitic Stainless Steel SUS304 vs SUS316 Pin Chambers in Salt Spray
Engineering Overview: Metallurgical comparison of SUS304 and SUS316 stainless steel lock components under ASTM B117 neutral salt spray testing.
Technical & Engineering Specifications
| Molybdenum | 0.0% (SUS304) vs 2.0-3.0% Mo (SUS316) |
|---|---|
| PREN Index | 18.0 (SUS304) vs 24.5 (SUS316) |
| Salt Fog Life | 480h (SUS304) vs 1000h+ (SUS316) |
| Alloys Compared | SUS304 (1.4301) vs SUS316 (1.4401) |
Stainless Steel Alloy Selection
- SUS304 (1.4301): 18% Cr, 8% Ni. Excellent baseline corrosion resistance, but susceptible to pitting in coastal marine air.
- SUS316 (1.4401): Incorporates 2.5% Molybdenum (Mo), boosting PREN to $\ge 24$ and surviving $>1000\text{ hours}$ salt fog.
Frequently Asked Engineering & Selection Questions
Q1: What are the primary material characteristics of this finish?
Metallurgical comparison of SUS304 and SUS316 stainless steel lock components under ASTM B117 neutral salt spray testing.