ASTM A307

• Standard Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength.

• A307 Grades

  Grade	Description
  A	Bolts and studs having a minimum tensile strength of 60 ksi and intended for general applications.
  B	Bolts and studs having a tensile strength of 60 to 100 ksi and intended for flanged joints in piping systems with cast iron flanges.
  C	Replaced by Specification ASTM F1554-36

• A307 Mechanical Properties

  Grade	Tensile Ksi	Yield Ksi, Min	Elongation %, Min
  A	60 Min	N/A	18
  B	60 - 100	N/A	18
  C	See F1554-36	See F1554-36	See F1554-36

• A307 Chemical Properties

  Element	Grade A	Grade B	Grade C
  Carbon, Max	0.29%	0.29%	See F1554-36
  Manganese, Max	1.20%	1.20%	See F1554-36
  Phosphorus, Max	0.04%	0.04%	See F1554-36
  Sulfur, Max	0.15%	0.05%	See F1554-36

• A307 Recommended Hardware

  Fastener Grade and Size	Nut Grade and Style	Washer
  A: 1/4" to 1-1/2"	A563A Hex	F844
  A: 1-1/2" to 4"	A563A Heavy Hex	F844
  B: 1/4" to 4"	A563A Heavy Hex	F844
  C	See F1554-36	See F1554-36

• The provided information was taken directly form the listed ASTM Standard, Additional information can be found in ASTM A307-10.

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