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321/ 321H, MT321, ASTM A511
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Chemical Composition
Base Element
Fe (Iron)
C (Carbon)
0.08
% (maximum)
Cr (Chromium)
17 to 20
%
Fe (Iron)
63.9 to 74
%
(estimate)
Mn (Manganese)
2
% (maximum)
Ni (Nickel)
9 to 13
%
P (Phosphorus)
0.04
% (maximum)
S (Sulfur)
0.03
% (maximum)
Si (Silicon)
1
% (maximum)
Composition Note
Fe is listed as a Base element for this material, but its % value is not listed in the specification. The value shown is a calculated one.
Mechanical Properties
Yield Strength
207
MPa (minimum)
Ultimate Tensile Strength
517
MPa (minimum)
Elongation
35
% strain (minimum)
Brinell Hardness
192
(maximum)
Other Information
Material Class
Ferrous Alloy
Alloy Family
High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels)
Alloy Group
Austenitic stainless steel
Alloy Sub-Group
321/ 321H
Country
USA
Standards Body
ASTM (USA)
Description
Seamless stainless tubing for use in mechanical applications for corrosion-resistant or high-temp strength; mech props ann
Designation
MT321
Specification Type
Standard
Specification
ASTM A511
Specification Year
2004
Specification Status
Active
Specification Status Notes
active 2004
Source
Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006
Available forms
Wrought
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Organizations
American Society for Testing and Materials (ASTM)
No warranty is given for the accuracy of these data
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