Acero Inoxidable 321

  • UNS S32100
  • ASTM A 240, A 479, A 276

Acero Inoxidable 321 is available in the following forms at Mega Mex

  • Lámina
  • Placa
  • Barra
  • Tubo y Tubing
  • Conexiones (Por ejemplo: bridas deslizables, ciegas, soldables, lap joints, de cuello largo, de boquilla, codos, tees, stub-ends, retornos, tapones cachucha, cruces, reducciones y niples para tubo.
  • Weld Wire
321 Stainless Steel Overview

321 Stainless Steel Overview

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

Stainless 321 Chemical Composition, %

Cr Ni Mo Cu Ti C Mn Si P S N Fe
MIN
17.0
9.0
-
-
5x(C+N)
-
-
0.25
-
-
-
-
MAX
19.0
12.0
0.75
0.75
0.70
0.08
2.0
1.0
0.04
0.03
0.1
Bal

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

Propiedades Mecánicas

Average Elevated Temperature Tensile Properties

Temperatura, °F Resistencia a la tensión (ksi) Min. .2% Resistencia a punto cedente, ksi
68
84
38
400
62
20.5
600
62
18
800
62
17
1000
59.5
16.5
1200
45.5
16
1400
27.5
14

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.