321 stainless steel 5*1.2mm capillary tubing
Alloy 321 (UNS S32100) is a
titanium stabilized austenitic
stainless steel with good general
corrosion resistance. It has excellent
resistance to intergranular corrosion
after exposure to temperatures in the
chromium carbide precipitation
321 stainless steel 5*1.2mm capillary tubing
range of 800–1500°F (427–816°C).
The alloy resists oxidation to 1500°F
(816°C) and has higher creep and
stress rupture properties than alloys
304 and 304L. It also possesses
good low temperature toughness.
Alloy 321H (UNS S32109) is the
higher carbon (0.04–0.10) version of
the alloy. It was developed for
enhanced creep resistance and for
higher strength at temperatures
above 1000°F (537°C). In most
instances, the carbon content of the
plate enables dual certification.
Alloy 321 cannot be hardened by
heat treatment, only by cold working.
It can be easily welded and
processed by standard shop
fabrication practices.
Applications
• Aerospace
—piston engine
manifolds
• Chemical Processing
• Expansion Joints
• Food Processing—equipment
and storage
• Petroleum Refining—polythionic
acid service
• Waste Treatment—thermal
oxidizers
Standards
321 stainless steel 5*1.2mm capillary tubing
ASTM …………….. A 240
ASME …………….. SA 240
AMS ………………. 5510
Chemical Analysis
Weight % (all values are maximum unless a range is otherwise indicated)
Specification Sheet: Alloy 321/321H
(UNS S32100, S32109) W. Nr. 1.4541
A Titanium Stabilized Austenitic Stainless Steel with Excellent Resistance
to Intergranular Corrosion After Exposure to Temperatures in the
Chromium Carbide Precipitation Range of 800–1500°F (427–816°C)
321 stainless steel 5*1.2mm capillary tubing
Alloy 321 06/2014
rev 02/2023 PDF link
Physical Properties
Density
0.286 lbs /in3
7.920 g/cm3
Modulus of Elasticity
28.0 x 106 psi
193 GPa
Melting Range
2550–2635°F
1398–1446°C
Specific Heat
0.12 BTU/lb-°F (32–212°F)
500 J/kg-°K (0–100°C)
Thermal Conductivity 212°F (100°C)
9.3 BTU/hr/ ft2/ft /°F
16.0 W/m-°K
Electrical Resistivity
72 Microhm-cm at 20°C
Mechanical Properties
Typical Values at 68°F (20°C)
Temperature Range
°F
°C
in/in °F
cm/cm °C
68–212
20–100
9.2 x 10-6
16.0 x 10-6
68–1112
20–600
10.5 x 10-6
18.9 x 10-6
68–1832
20–1000
11.4 x 10-6
20.5 x 10-6
Yield Strength
Ultimate Tensile
Elongation
Hardness
0.2% Offset
Strength
in 2 in.
psi (min.)
(MPa)
psi (min.)
(MPa)
% (min.)
(max.)
30,000
205
75,000
515
40
217 Brinell
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