ASTM A449 Type 2 Hex Cap Screws, Bolts, Stud Bolts

ASTM A449 Type 2 is a grade specification for high tensile low carbon martensite steel bolting material. BoltPort offers Hex Bolts, Heavy Hex Bolts, Stud Bolts, Threaded Rods in A449 Type 2 specification. These A449 Type 2 Bolts are manufactured from 1/4" through 1" in imperial. ASTM A449 Type 2 Bolts can be provided with metallic zinc, hot dipped galvanizing, cadmium coatings. BoltPort can supply these bolts with EN 10204 type 3.1 certification.

ASTM A449 Type 2 Bolting Size Range

Grade Imperial (Inch)
Type 2 1/4" to 1"

ASTM A449 Type 2 Chemical Composition

Element Type 2
Heat Analysis, % Product Analysis, %
Carbon 0.15 - 0.38 0.13 - 0.41
Manganese, min 0.60 0.67
Phosphorus, max 0.040 0.048
Sulfur, max 0.050 0.058
Boron, min 0.0005 0.0005

Hardness Requirements for ASTM A449 Type 2 Bolts (Imperial)

Bolt Size, inch Hardness Brinell Hardness Number Rockwell C
1/4 to 1, incl. 255 to 321 25 to 34
Over 1 to 1-1/2, incl. 223 to 285 19 to 30
Over 1-1/2" to 3, incl. 183 to 235 --

ASTM A449 Type 2 Mechanical Requirement (Imperial)

Nominal Diameter, inch Tensile Strength, ksi Yield Strength, min, ksi Elongation in 4D, min, % Reduction in Area, min, %
1/4 to 1, incl. 120 92 14 35
Over 1 to 1-1/2, incl. 105 81 14 35
Over 1-1/2 to 3, incl. 90 58 14 35

Recommended Nuts

Bolt Type and Surface Finish Nut Grade and Style
1/4" to 1-1/2", plain (or with a coating of insufficient thickness to require over tapped nut) B, Hex
Over 1-1/2" to 3", plain (or with a coating of insufficient thickness to require over tapped nut) A, Heavy Hex
1/4" to 3", zinc coated (or with a coating thickness requiring over tapped nut) DH, Heavy Hex