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Unclassified steel, ALMAR 20 (AL Tech Specialty Steel Corp.)
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Chemical Composition
Base Element
Fe (Iron)
Al (Aluminum)
0.15 to 0.3
%
B (Boron)
0.003
%
C (Carbon)
0.03
% (maximum)
Fe (Iron)
77.5 to 79
%
(estimate)
Nb (Niobium)
0.5
%
Ni (Nickel)
19 to 20
%
Ti (Titanium)
1.3 to 1.6
%
Zr (Zirconium)
0.02
%
Balance
Fe (Iron)
Composition Note
Fe is listed as a Balance element for this material, but its % value is not listed in the specification. The value shown is a calculated one.
Mechanical Properties
Yield Strength
244 to 260
ksi
Ultimate Tensile Strength
252 to 265
ksi
Elongation
10 to 13
% strain
Rockwell Hardness C scale
49 to 53
Other Information
Material Class
Ferrous Alloy
Country
USA
Description
Heat treated: 253,000-265,500 TS; 244,000-260,000 YS; 10-13 El; 52-59 RA; 49-53 HRC; For rocket motor cases, airframes, airborne equipment, large machinery parts, bolts, cryogenic and high temperature equipment. Maraging steel, shock resistant.
Designation
ALMAR 20
Specification Type
Manufacturer's Specification
Specification Status
Obsolete
Source
Woldman's Engineering Alloys 9th ed. J. Frick Editor, ASM International 2000
Available forms
Wrought
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Organizations
AL Tech Specialty Steel Corp.
No warranty is given for the accuracy of these data
Copyright © 2024 ASM International®
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