• Scope
• Chemical Composition
• Mechanical Properties
• Appurtenant Specifications

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