Standard Scope
ASTM A105 covers forged carbon steel flange and piping components for ambient and higher-temperature service in pressure systems. It also includes pipe fittings, valves and similar parts. The maximum weight manufactured forging part follows by this standard is 10000 bounds (4540kg). The larger forgings can according by the standard A 266/A266M. This specification do not covers tube sheets and hollow cylindrical forgings for pressure vessel shells .
This specification does not covers raw material which round bar and seamless tubular produced piping components.
ASTM A105 Chemical Composition
|
Element
|
Composition, %
|
|
C
|
0.35 max
|
|
Mn
|
0.60-1.05
|
|
P
|
0.035max
|
|
S
|
0.040max
|
|
Si
|
0.10-0.35
|
|
Cu
|
0.40max
|
|
Ni
|
0.40max
|
|
Cr
|
0.30max
|
|
Mo
|
0.12max
|
|
V
|
0.08max
|
A The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%.
B The sum of chromium and molybdenum shall not exceed 0.32%
ASTM A105 Mechanical Properties
|
Tensile Strength, min, ksi[Mpa]
|
70[485]
|
|
Yiled Strength, min, ksi[Mpa]
|
36[250]
|
|
Elongation in 2 in, or 50mm, min, %
|
|
|
Basic minimum elongation for walls 5/16 in.[7.9mm] and over in thickness, strip tests
|
30
|
|
When standard round 2-in. Or 50mm gauge length or smaller proportionally sized specimen with the gauge length equal to 4D is used
|
22
|
|
For strip tests, a deduction for each 1/32 in.[0.8mm] decrease in wall thickness below 5/16 in.[7.9mm] from the basic minimum elongation of the percentage points of table 3
|
1.5
|
|
Reduction of area, min, %
|
30
|
|
Hardness, HBW, max
|
187
|
Heat treatment
Heat treatment is not required except for flanges above Class 300, flanges of special design where the design pressure or design temperature are not known and for items over 4" NPS and above Class 300. When heat treatment is required, annealing, normalizing, Normalize and temper, normalize and quench and tempering shall be the applied methods.
Welding
These components can be welded. Welding procedures must comply with ASME Boiler and Pressure Vessel Code Section IX.
Forging
ASTM A105 carbon steel can be forged at temperatures in the range of 2200 to 1700 F followed by quenching and tempering or normalizing.
Annealing
Forged parts can be cooled to below 1000 degrees Fahrenheit and then heated to between 1550 degrees Fahrenheit and 1,700 degrees Fahrenheit. Then carry out slow furnace cooling.
Hydro-static Test
Hydro-static Test shall be conducted by the forging manufacture only when Supplemental S57 of ASTM A961 is specified.
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