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HL, HL, ASTM A297/A297M-97
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Chemical Composition
Base Element
Fe (Iron)
Ag (Silver)
Al (Aluminum)
As (Arsenic)
Au (Gold)
B (Boron)
Be (Beryllium)
Bi (Bismuth)
C (Carbon)
0.2 to 0.6
%
Ca (Calcium)
Cd (Cadmium)
Ce (Cerium)
Co (Cobalt)
Cr (Chromium)
28 to 32
%
Cu (Copper)
Fe (Iron)
40.8 to 53.8
%
(estimate)
Ga (Gallium)
Hf (Hafnium)
In (Indium)
Li (Lithium)
Mg (Magnesium)
Mn (Manganese)
2
% (maximum)
Mo (Molybdenum)
0.5
% (maximum)
N (Nitrogen)
Na (Sodium)
Nb (Niobium)
Ni (Nickel)
18 to 22
%
P (Phosphorus)
0.04
% (maximum)
Pb (Lead)
Pd (Palladium)
Pt (Platinum)
S (Sulfur)
0.04
% (maximum)
Sb (Antimony)
Se (Selenium)
Si (Silicon)
2
% (maximum)
Sn (Tin)
Sr (Strontium)
Ta (Tantalum)
Te (Tellurium)
Th (Thorium)
Ti (Titanium)
Tl (Thallium)
V (Vanadium)
W (Tungsten)
Zn (Zinc)
Zr (Zirconium)
Balance
Others Total
Others Each
Other elements
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
Tabular Data
Yield Strength
34.8
ksi (minimum)
Ultimate Tensile Strength
65.3
ksi (minimum)
Elongation
10
% strain (minimum)
Density
Brinell Hardness
Vickers Hardness
Rockwell Hardness C scale
Rockwell Hardness B scale
Rockwell Hardness A scale
Rockwell 30-T scale
Rockwell 15-T scale
Condition
Notes on Mechanical Properties
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
HL
Country
USA
Standards Body
ASTM (USA)
Description
Fe-Cr-Ni alloy castings for heat-resistant service.
Alternate Name
29 Chromium, 20 Nickel
Designation
HL
Specification Type
Standard
Specification
ASTM A297/A297M-97
Specification Year
2003
Specification Status
Active
Specification Status Notes
active 2003
Similar US Grade
Similar UNS Number
Equivalent Standards
Source
Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006
Online Source
Organization
Available forms
Casting
Similar Alloys
Click here to find similar alloys
Links
Organizations
American Society for Testing and Materials (ASTM)
No warranty is given for the accuracy of these data
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