V2A vs V4A — How Stainless Steels Differ and Which to Choose

Choosing between V2A and V4A is one of the most common decisions when ordering stainless steel products. Both are chromium-nickel steels, but they differ in composition and corrosion resistance.

V2A — 1.4301 / AISI 304

The most popular stainless steel for general applications. It handles moisture and typical industrial environments well, is easy to machine and weld. It works where there is no constant exposure to chlorine and aggressive acids.

V4A — 1.4404 / AISI 316L

V4A contains an addition of molybdenum (approx. 2%), which significantly increases resistance to pitting corrosion — especially in the presence of chlorides (salt, pool water), acids and aggressive chemicals. The “L” designation means low carbon content, beneficial for welding (lower risk of intercrystalline corrosion).

Which to choose?

• V2A (304) — drains and equipment in typical conditions, general industry, gastronomy without aggressive chemicals.
• V4A (316L) — pools and car washes (chlorine, salt), chemical and pharmaceutical industry, wet zones with intensive washing, coastal environment.

In short

If chlorine, salt or acids are present — choose V4A. For other applications, V2A is usually sufficient, more cost-effective. In case of doubt, it is worth matching the material to the specific medium and process.

Not sure? See our stainless steel products V2A/V4A — e.g. industrial hatches or drains for car washes.