A 316 stainless steel solar cable clip is worth the extra cost when your array sits near the sea, a pool, or any place where salt and chlorides reach the hardware. Cable clips are small and easy to ignore, until one rusts and the cable runs begin to sag onto the roof.
This page explains when 316 is the right choice, how to confirm you are getting real 316, and how to order. It is the same two-line clip design as our SUS304 two-line solar cable clip, made in a different material, so dimensions and installation are the same.
What makes 316 different from 304
Both are austenitic stainless steels that resist corrosion through a thin chromium oxide film. The difference is that 316 contains about 2–3% molybdenum, and 304 contains none.
That matters because of chlorides. Salt in the air attacks the oxide film locally, and where it fails, small deep pits form. Molybdenum makes the film much harder to break down, which is why 316 is the usual choice for marine and chloride-heavy environments. In fasteners, the same distinction appears as A2 (304 equivalent) and A4 (316 equivalent).
Does your site need 316?
There is no single distance from the coast that applies everywhere. Wind direction, sea spray and terrain all change salt exposure, so look at the environment itself.
316 is worth considering when:
- The site is coastal, on an island, or on a floating or near-water structure
- Salt fog or sea spray reaches the array regularly
- The site is near a swimming pool or other chlorinated water
- Livestock or fertilizer produces ammonia in the air
- Industrial emissions or road de-icing salt are present
For sites with ordinary rain and dust and no direct salt exposure, SUS304 handles most outdoor conditions and costs less. ISO 9223 classifies atmospheric corrosivity from C1 (very low) to CX (extreme); sites in the higher categories are where 316 makes the most sense.
Choosing between 304 and 316
- Ordinary outdoor site, no direct salt exposure: SUS304 is generally enough.
- Coastal, chlorinated or chemical exposure: choose 316.
- Uncertain conditions: order small samples of both, expose them on the actual array for a season, and compare.
- Large project: the extra cost per clip is small compared with the labor of replacing clips after the plant is built.
For mild inland sites where cost is the priority, see our plastic cable clips.
Get a quote for 316 stainless steel solar cable clips
To give you an accurate quote, please tell us:
1.Quantity and delivery port
2.Cable size
3.Whether you need samples
4.OEM packing requirements
Email: info@SolarPartsComponents.com
WhatsApp: +86 183 592 60008
Related: SUS304 two-line solar cable clips · All solar cable clips
