A449 is a ASTM International specification for hex cap screws, bolts and studs. A449 covers quenched and tempered steel hex cap screws, bolts and studs intended for general engineering use in sizes 1/" to 3" inclusive.
A449 is a ASTM International specification for hex cap screws, bolts and studs.
A449 covers quenched and tempered steel hex cap screws, bolts and studs intended for general engineering use in sizes 1/4" to 3" inclusive.
A449 Type 1:
Plain carbon steel, carbon boron steel, alloy steel or alloy boron steel.
NOTE: There are other types of A449. The one listed here is the one we receive the most requests for. For information on other types, please contact one of our salesmen.
A449 MECHANICAL PROPERTIES
|Size||Tensile, ksi, min||Yield, ksi, min||Elong. % min||RA min|
|1/4" - 1"||120||92||14||35|
|1-1/8" - 1-1/2"||105||81||14||35|
|1-5/8" - 3"||90||58||14||35|
A449 TYPE 1 CHEMICAL PROPERTIES
|Element||Carbon Steel||Carbon Boron Steel||Alloy Steel||Alloy Boron Steel|
|Carbon||0.30% - 0.52%||0.30% - 0.52%||0.30% - 0.52%||0.30% - 0.52%|
|Silicon||0.15 - 0.30%||0.10 - 0.30%||0.15 - 0.35%||0.15 - 0.35%|
|Boron||0.0005 - 0.003%||0.0005 - 0.003%|
Note: Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the max range given for the content of alloying elements exceeds one of more of the following limits:
Or in which a definite range or minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels.
Chromium (up to 3.99%)
Or any other alloying elements added to obtain a desired alloying effect.
A449 RECOMMENDED HARDWARE
|Type 1||plain||1-4" - 1-1/2"||hex||A563 Grade B||F436|
|1-5/8" - 3"||heavy hex||A563 Grade A||F436|
|zinc plated||1-4" - 3"||heavy hex||A563 Grade DH||F436|
|galvanized||1/4" - 3"||heavy hex||A563 Grade DH||F436|
Note: Nuts of other grades and styles having specified proof of load stresses (per ASTM A563 specification) greater than the specified grade and style of nut are suitable.