Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts
ASTM A105 specification covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems. Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards such as the MSS, ASME, and API specifications referenced in Section 2. Forgings made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. Larger forgings may be ordered to Specification A266/A266M. Tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification. Although this specification covers some piping components machined from rolled bar and seamless tubular products (see 5.2), it does not cover raw material produced in these product forms.
Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
Specification A266/A266M covers other steel forgings and Specifications A675/A675M and A696 cover other steel bars.
ASTM A105 specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other Combining values from the two systems may result in nonconformance with the standard.
|Composition, %||0.35 max||0.60-1.05||0.035 max||0.040 max||0.10-0.35||0.40 max A||0.40 max A||0.30 maxA ,B||0.12 max A ,B||0.08 max|
|Tensile strength, min, ksi [MPa]||70 |
|Yield strength, min, ksi [MPa]B||36 |
|Elongation in 2 in. or 50 mm, min, %:|
|Basic minimum elongation for walls 5/16 in. [7.9 mm]
and over in thickness, strip tests.
|When standard round 2-in. or 50-mm gauge length or
smaller proportionally sized specimen with the gauge
length equal to 4D is used
|For strip tests, a deduction for each 1/32-in. [0.8-mm]
decrease in wall thickness below 5/16 in. [7.9 mm]
from the basic minimum elongation
of the percentage points of Table 3
|Reduction of area, min, %D||30|
|Hardness, HBW, max||197|
|S3||Marking Small Forgings|