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ASTM A105 Specification

ASTM A105 is a standard material specification for forged carbon steel piping components including bolts, nuts, studs and other fasteners to standard or custom dimensions, for use in ambient and higher temperature service in pressure systems. Boltport offers all types of carbon steel forged fasteners to ASTM A105 specifications.

Chemical Composition

Element Composition, %
Carbon 0.35 max
Manganese 0.60 - 1.05
Phosphorus 0.035 max
Sulfur 0.040 max
Silicon 0.10 - 0.35
Copper 0.40 max [Note B]
Nickel 0.40 max [Note B]
Chromium 0.30 max [Note B, C]
Molybdenum 0.12 max [Note B, C]
Vanadium 0.08 max

Notes
A : For each reduction of 0.01 % below the specified carbon maximum (0.35 %), an increase of 0.06 % manganese above the specified maximum (1.05 %) will be permitted up to a maximum of 1.65 %. B : The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00 %.
C : The sum of chromium and molybdenum shall not exceed 0.32 %.

Mechanical Properties

Property Value
Tensile Strength, min, ksi 70.00
Yield Strength, min, ksi [Note A] 36.00
Elongation in 2 inch. Round Specimen 22.00
Strip Specimen 5/16" and Over 30.00
Strip Specimen, Smaller sizes See next table
Reduction of Area, min, % [Note B] 30.00
Hardness, HWB, max 187

Notes :
A : Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.
B : For round specimen only.

Wall Thickness Elongation in 2 inch, min, %
5/16 30.00
9/32 28.50
1/4 27.00
7/32 25.50
3/16 24.00
5/32 22.50
1/8 21.00
3/32 19.50
1/16 18.00

Commonly Produced A105 Fasteners

  • Studs
    Studs
  • Hex Bolts
    Hex Bolts
  • Heavy Hex Bolts
    Heavy Hex Bolts
  • Anchor Bolts
    Anchor Bolts
  • Threaded Bars
    Threaded Bars
  • Socket Head Cap Screw
    Socket Head Cap Screw
  • U Bolts
    U Bolts
  • J Bolts
    J Bolts
  • Hex Nuts
    Hex Nuts
  • Heavy Hex Nuts
    Heavy Hex Nuts
  • Jack Screws
    Jack Screws
  • Countersunk Screws
    Countersunk Screws
  • Nib Bolts
    Nib Bolts
  • Square Head Bolts
    Square Head Bolts
  • Eye Bolts
    Eye Bolts