ASTM A105/A105M

ASTM A105/A105M Standard Specification for Carbon Steel Forgings for Piping Applications.

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ASTM A105 flanges

ASTM A105 steel grade is a typical common material (mild carbon steel) for forged carbon steel flange, it used in a lot of places for ambient and higher-temperature service in pressure systems. This material is durable, cost lower, and difficult to break. In case used in a stainless steel piping system it shall be adapted with a lap joint end ring.

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.

Referenced documents

The following list of standard apply to these specification:

ASTM standards:

MSS standard:

ASME Standard:

API standard:

Chemical requirements ASTM A105

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 (1)
Nickel 0.40 max (1)
Chromium 0.30 max (1-2)
Molybdenum 0.12 max (1-2)
Vanadium 0.08 max

(1) The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%.
(2) The sum of chromium and molybdenum shall not exceed 0.32%.

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 1.35%.

For definitions of other terms used in this specification, find in specification A961/A961M.

Ordering information
See specification A961/A961M.

General requirements
If conflict between the requirements of this specification and Specification A961/A961M. Comply with this specification.

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.

These components can be welded. Welding procedures must comply with ASME Boiler and Pressure Vessel Code Section IX.

ASTM A105 carbon steel can be forged at temperatures in the range of 2200 to 1700 F followed by quenching and tempering or normalizing.

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.

ASTM A105 flange

ASTM A105 Flange is a specification of flanges. The specification can include different grades of stainless steel material made flanges. The flanges are of forged carbon steel and are meant for high temperature services. Navstar Steel is a leading manufacturer and supplier of the ASTM A105 Flange types.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes