A105/A105M:American Society for Testing and Materials
Carbon Steel Forgings for Piping Applications
Scope: This specification covers forged carbon steel piping components for ambient and higher-temperature service in pressure systems.

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
Nickel	0.40 max
Chromium	0.30 max
Molybdenum	0.12 max
Vanadium	0.08 max

Mechanical Properties
Tensile strength, min, ksi [MPa]	70 [485]
Yield strength, min, ksi [MPa]	36 [250]
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.	30
When standard round 2-in. or 50-mm 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. [0.8-mm] decrease in wall thickness below 5⁄16 in. [7.9 mm] from the basic minimum elongation of the percentage points	1.5
Reduction of area, min, %	30
Hardness, HBW, max	187

Wall Thickness		Elongation in 2 in. or 50
in.	mm	mm, min, %
5⁄16 (0.312)	7.9	30
9⁄32 (0.281)	7.1	28.5
1⁄4 (0.250)	6.4	27
7⁄32 (0.219)	5.6	25.5
3⁄16 (0.188)	4.8	24
5⁄32 (0.156)	4	22.5
1⁄8 (0.125)	3.2	21
3⁄32 (0.094)	2.4	19.5
1⁄16 (0.062)	1.6	18

1.1This 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. Forg-ings 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 cylin-drical forgings for pressure vessel shells are not included within the scope of this specification. Although this specifica-tion 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.
1.2Supplementary 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.
1.3Specification A266/A266M covers other steel forgings and Specifications A675/A675M and A696 cover other steel bars.