What is the difference between 304 and 321 stainless steel?

304 stainless steel is low carbon chromium nickel stainless and heat resisting steel somewhat superior to Type 302 in corrosion resistance. 321 stainless steel is basically from 304 stainless steel. They different by a very very small addition of Titanium. The real difference is their carbon content.

What is SS 321 material?

321 SS (UNS S32100) is a titanium stabilized austenitic stainless steel that features improved resistance to intergranular corrosion. This grade is suitable for high-temperature applications up to 1500°F (815°C), where the addition of titanium stabilizes the material against chromium carbide formation.

Does 321 stainless steel rust?

GENERAL PROPERTIES Type 321 is a stabilized stainless steel which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500° F (427 to 816° C).

What is the difference between 316 and 321 stainless steel?

The most popular acid-resistant material is steel AISI 316, which exhibits increased resistance to corrosion in very aggressive chemical environments. The third tested type is AISI 321, which shows high resistance to inter-crystalline corrosion and resistance to the work in higher temperatures, i.e. 400 – 800°C [9].

Is 304 or 316 stainless stronger?

Though the stainless steel 304 alloy has a higher melting point, grade 316 has a better resistance to chemicals and chlorides (like salt) than grade 304 stainless steel. When it comes to applications with chlorinated solutions or exposure to salt, grade 316 stainless steel is considered superior.

Is 304 or 316 stainless steel stronger?

What is the difference between 321 and 347 stainless steel?

Type 321 is stabilized against chromium carbide formation by the addition of titanium. Types 347 and 348 are stabilized by the addition of columbium and tantalum.

Does 316 grade stainless steel rust?

Stainless 316 is made up of 16% chromium, 10% nickel and 2% molybdenum. The two steel grades are comparable in appearance, chemical makeup and characteristics. Both steels are durable and provide excellent resistance to corrosion and rust.

Which is better ss316 or ss304?

Since Type 316 stainless steel alloy contains molybdenum bearing it has a greater resistance to chemical attack than 304. Type 316 is durable, easy-to-fabricate, clean, weld and finish. It is considerably more resistant to solutions of sulfuric acid, chlorides, bromides, iodides and fatty acids at high temperature.

What are the features of 321 stainless steel?

321 Stainless Steel Sheet, 321 Stainless Steel Plate, 321 Stainless Steel Bar. The key feature of 321 Stainless Steel is its resistance to intergranular corrosion. 321 Stainless Steel also has low risk of weld decay due to addition of Titanium.

What kind of filler is used for Type 321 stainless steel?

For this reason, Type 321 is designed to resolidify with a small amount of ferrite to minimize cracking susceptibility. Columbium stabilized stainless steels are more prone to hot cracking than titanium stabilized stainless steels. Matching filler metals are available for welding Type 321 stabilized stainless steel.

How is Type 321 austenitic stainless steel susceptible to SCC?

Please review the comments under the HEAT TREATMENT section. The Type 321 austenitic stainless steel is susceptible to stress corrosion cracking (SCC) in halides similar to Type 304 stainless steel. This results because of their similarity in nickel content.

What’s the difference between Type 321 and type 304L?

Type 321 is stabilized against chromium carbide formation by the addition of titanium. While Type 321 continues to be employed for prolonged service in th4e 800 to 1500° F (427 to 816° C) temperature range, Type 304L has supplanted this stabilized grade for applications involving only welding or short time heating.