1.4541/ 321 Stainless Steel Hex Head Bolt

1.4541 321 stainless steel m36 hex head bolt 

UNS S32100
ASTM A 240, A 479, A 276

General information:

321 Stainless Steel Overview

Stainless 321 is a heat resistant, titanium stabilized, austenitic alloy that's commonly used for service in the 1000°-1600°F temperature range. 321 stainless is primarily used in applications that involve continuous and intermittent service temperatures within the carbide precipitation range of 800°-1500°F. Type 321 is similar to type 304 stainless but with a titanium addition of at least five times the carbon content. This titanium addition reduces or prevents carbide precipitation during welding and in the 800°-1500°F service conditions. In order to provide optimum resistance to intergranular corrosion and to polythionic acid stress corrosion cracking in service temperatures at 1500°-1650°F an air cool may be used.

What are the characteristics of 321 Stainless?

• Oxidation resistant to 1600°F
• Stabilized against weld heat affected zone (HAZ) intergranular corrosion
• Resists polythionic acid stress corrosion cracking

Stainless 321 Chemical Composition, %

What applications might 321 Stainless Steel be used?

• Aircraft piston engine manifolds and exhaust stacks
• Expansion joints
• Thermal oxidizers
• Refinery equipment
• High temperature chemical process equipment
  

Welding Stainless Steel 321

321 Stainless is readily welded by all common methods including submerged arc. Appropriate weld fillers are most often specified as AWS E/ER 347 or E/ER 321.

This alloy is generally considered to have comparable weldability to 304 and 304L stainless with the main difference being the titanium addition which reduces or prevents carbide precipitation during welding.

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