ASTM A449 Fasteners Bolts Specification | ASTM A449 Fasteners Bolts - ASTM A449 Fasteners Bolts Techinical Information | ASTM A449 Dimensions
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ASTM A449 Fasteners

ASTM A449

Scope

ASTM A449 covers headed bolts, rods, and anchor bolts in diameters ranging from 1/4" through 3" inclusive. It is a medium strength bolt manufactured from a medium carbon or alloy steel that develops its mechanical values through a heat treating process. It is intended for general engineering applications.

ASTM A449 is virtually identical in chemistry and strength to ASTM A325 and SAE J429 grade 5. However, A449 is more flexible in the sense that it covers a larger diameter range and is not restricted by a specific configuration.

Types

TYPE 1 Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel.
TYPE 2 Withdrawn 2003
TYPE 3 Weathering steel.

Mechanical Properties

Size Tensile, ksi Yield, ksi Elong. %, min RA %, min
1/4 - 1 120 min 92 min 14 35
1-1/8 - 1-1/2 105 min 81 min 14 35
1-5/8 - 3 90 min 58 min 14 35

Chemical Properties

Type 1 Bolts
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%
Manganese, min 0.60% 0.60% 0.60% 0.60%
Phosphorus, max 0.040% 0.040% 0.035% 0.035%
Sulfur, max 0.050% 0.050% 0.040% 0.040%
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%
Alloying Elements     * *
* Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum range given for the content of alloying elements exceeds one of more of the following limits: Manganese, 1.65%, silicon, 0.60%, copper, 0.60%, or in which a definite range or a minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99%, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium or any other alloying elements added to obtain a desired alloying effect.

 

Type 3 Bolts, Class *
Element A B C D E F
Carbon 0.33 - 0.40% 0.38 - 0.48% 0.15 - 0.25% 0.15 - 0.25% 0.20 - 0.25% 0.20 - 0.25%
Manganese 0.90 - 1.20% 0.70 - 0.90% 0.80 - 1.35% 0.40 - 1.20% 0.60 - 1.00% 0.90 - 1.20%
Phosphorus 0.035% max 0.06 - 0.12% 0.035% max 0.035% max 0.035% 0.035%
Sulfur, max 0.040% 0.040% 0.040% 0.040% 0.040% 0.040%
Silicon 0.15 - 0.35% 0.30 - 0.50% 0.15 - 0.35% 0.25 - 0.50% 0.15 - 0.35% 0.15 - 0.35%
Copper 0.25 - 0.45% 0.20 - 0.40% 0.20 - 0.50% 0.30 - 0.50% 0.30 - 0.60% 0.20 - 0.40%
Nickel 0.25 - 0.45% 0.50 - 0.80% 0.25 - 0.50% 0.50 - 0.80% 0.30 - 0.60% 0.20 - 0.40%
Chromium 0.45 - 0.65% 0.50 - 0.75% 0.30 - 0.50% 0.50 - 1.00% 0.60 - 0.90% 0.45 - 0.65%
Vanadium     0.020% min      
Molybdenum   0.06% max   0.10% max    
Titanium       0.05% max    
* Selection of a class shall be at the option of the manufacturer

Recommended Nuts and Washers

Nuts Washers
Plain Galvanized
1/4 - 1-1/2 1-5/8 - 3 1/4 - 3
A563B Hex A563A Heavy Hex A563DH Heavy Hex F436
Note: Nuts of other grades having proof load stresses greater than the specified grade are suitable. The ASTM A563 Nut Compatibility Chart has a complete list of specifications.  
 

Fasteners Specification :

   

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