ASTM A449

• Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 KSI Minimum Tensile Strength, General Use.

  A449 Type 1 Mechanical Properties

  Diameter	Tensile, Ksi, Min	Yield, Ksi, Min	Elongation % Min
  1/4" to 1"	120	92	14
  1-1/8" to 1-1/2"	105	81	14
  1-5/8" to 3"	90	58	14

• A449 Type 1 Chemical Properties

  Element	Carbon Steel %	Alloy Steel %
  Carbon	0.30 to 0.52	0.30 to 0.52
  Manganese, Min	0.60	0.60
  Phosphorus, Max	0.040	0.035
  Sulfur, Max	0.050	0.040
  Silicon	0.10 to 0.30	0.15 to 0.35

• A449 Type 1 Recommended Hardware

  Finish	Diameter	Nut	Washer
  Plain	1/4" to 1-1/2"	A563B Hex	F436
  Plain	1-5/8" to 3"	A563DH Heavy Hex	F436
  Hot Dip Galvanized	1/4" to 3"	A563DH Heavy Hex	F436

  Nuts of other grades and styles having specified proof load stresses (specification A563, Table 3) greater than the specified of nut are suitable.

• The provided information was taken directly form the listed ASTM Standard, Additional information can be found in ASTM A449-10.

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