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Austenitic & Super Austenitics Steels

TP 321 • UNS S32100 • 1.4541

Grade 321 stainless steel (1.4541) is a heat resistant grade supplied into numerous industry sectors. The key property of this grade is the added titanium content (5 x C%) stabilising the material and making its resistance to carbide precipitation when exposed to high temperatures and resistance to oxidation its main characteristics.

Whilst retaining good strength and corrosion resistance when exposed to high temperatures, this grade of stainless steel like most austenitic grades will also maintain its strength and toughness at sub-zero temperatures, making this an excellent choice for various applications ranging from oil refinery equipment to automotive exhaust systems. This heat resistant grade of stainless steel has a maximum dry air service temperature of 850oC.

  • Typical manufacturing specifications

ASTM A213, ASTM A269, ASTM A312, ASTM A632 Also individual customer specifications.

  • Industries predominantly using this grade

Exhaust Systems, Manifolds, Chemical Plant , Heat Exchangers, Furnace Parts, Chimney and Stack Liners

Manufacturer of seamless tubes and pipes

Technical Data

Chemical composition(% by Weight)

Element

C

Mn

P

S

Si

Ni

Cr

Minimum

-

-

-

-

-

9.0

17.0

Maximum

0.080

2.00

0.045

0.030

1.00

12.0

19.0

Aiming

0.045

1.4

0.025

0.002

0.3

9.2

17.3

Mechanical Properties

Specifications(Tubing, Annealed) Actual data
Tensile Rm
75
ksi (min.)
79 ~ 98
ksi
Tensile Rm
515
MPa (min.)
550 ~ 680
MPa
Yield (R.p. 0.2%)
30
ksi (min.)
35 ~ 56
ksi
Yield (R.p. 0.2%)
205
MPa (min.)
250 ~ 370
MPa
Elongation
34
% (min.)
45 ~ 52
%