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8645/ 8650, 8645H, NMX-B-268
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Chemical Composition
Base Element
Fe (Iron)
C (Carbon)
0.42 to 0.49
%
Cr (Chromium)
0.35 to 0.65
%
Fe (Iron)
96.5 to 97.8
%
(estimate)
Mn (Manganese)
0.7 to 1.05
%
Mo (Molybdenum)
0.15 to 0.25
%
Ni (Nickel)
0.35 to 0.75
%
Si (Silicon)
0.2 to 0.35
%
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.
Other Information
Material Class
Ferrous Alloy
Alloy Family
Alloy Steel
Alloy Group
Nickel chromium molybdenum steel
Alloy Sub-Group
8645/ 8650
Country
Mexico
Standards Body
NMX (Mexico)
Description
Hardened
Designation
8645H
Specification Type
Standard
Specification
NMX-B-268
Specification Year
1968
Specification Status
Active
Specification Status Notes
active
Source
Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006
Available forms
Wrought
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Organizations
Direccion General de Normas (DGN) (General Directorate of Standards) (NMX/NOM/DGN)
No warranty is given for the accuracy of these data
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