In Terms Of Corrosion Resistance, Which Is Stronger, 321 Stainless Steel Or 316L Stainless Steel?

In terms of corrosion resistance, which is stronger, 321 stainless steel or 316L stainless steel?

321 belongs to the American standard titanium austenitic stainless steel, the implementation standard: ASTM A276/A276M-17

The performance of 321 stainless steel is very similar to 304, but due to the addition of titanium metal, it has better resistance to grain boundary corrosion and high temperature strength. Due to the addition of titanium metal, it effectively controls the formation of chromium carbide.

321 Stainless steel industry applications:

Applied to grain boundary corrosion resistance requires high chemical, coal, petroleum industry outdoor machine, building materials heat resistant parts and heat treatment of difficult parts

1. Oil exhaust gas combustion pipeline

2. Engine exhaust pipe

3. Boiler shell, heat exchanger, heating furnace parts

4. Diesel engine muffler parts

5. Boiler pressure vessel

6. Chemical trucks

7. Expansion joints

8. Spiral welded pipe for furnace pipe and dryer

316L is American standard austenitic stainless steel, 316L stainless steel implements the standard "ASTM A240/A240M-19"

316L stainless steel is molybdenum containing stainless steel, because the steel contains molybdenum, the overall performance of the steel is better than 310 and 304 stainless steel, high temperature conditions, when the concentration of sulfuric acid is less than 15% or higher than 85%, 316L stainless steel has a wide range of uses. 316L stainless steel also has good resistance to chloride erosion, so it is usually used in Marine environments. 316L stainless steel is often used in pulp and paper equipment heat exchangers, dyeing equipment, film washing equipment, pipelines, coastal area building external materials, as well as high-end watch chains, watch cases, etc. Seawater equipment, chemicals, dyes, papermaking, oxalic acid, fertilizer and other production equipment; Photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.