A105 flanges are seamless forged carbon steel piping components for use in pressure systems at ambient and high-temperature service.
Flanges, fittings, valves and various other parts ordered to customer dimension or to industry standards such as MSS, ASME and API specification are included in the scope.
Forgings to this specification are limited to 10,000 lbs.
Buttweld A105 Flanges
Slip on A105 Flanges
Socket Weld A105 Flanges
Threaded A105 Flanges
Blind A105 Flanges
Weld Neck A105 Flanges
A105 Flange Pressure Rating
150#, 300#, 400#, 600#, 900#, 1500#, 2500#
These components can be welded. Welding procedures must comply with ASME Boiler and Pressure Vessel Code Section IX.
Heat treatment is not a mandatory requirement 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.
This alloy is forged at between 1,700 degrees Fahrenheit and 2,200 degrees Fahrenheit, followed by quenching and tempering.
Forged parts are allowed to cool to below 1,000 degrees Fahrenheit before reheating to between 1,550 degrees Fahrenheit and 1,700 degrees Fahrenheit. Slow furnace cooling follows.
A105 Flanges Chemical Composition
||Composition %, Note C
||.40 max, note A
||.40 max, note A
||.30 max, note A,B
||.12 max, note A,B
||.08 max, note A
|Note A – The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%
Note B – The sum of chromium and molybdenum shall not exceed .32%
Note C – for each reduction of 0.01% below the specified carbon maximum (.35%), an increase of .06% manganese above the specified maximum (1.05%) will be permitted up to a maximum of 1.65%
A105 Flanges Mechanical Properties
||70 ksi, min
|Yield, note A
||36 ksi, min
|Elongation in 2in, Basic minimum for wall 5/16″ and over, strip test
||187 HBW max
|Note A – Determined by either the 0.2% offset method or the 0.5% extension-under-load method. Other test methods available as listed in A105.
Hydrostatic Test shall be conducted by the forging manufacture only when Supplemental S57 of ASTM A961 is specified.
Click here to request a quote for A105 flanges.