The ASTM A182 F11 steel is the standard specification for forged or rolled alloy and stainless-steel pipe flanges, as well as forged fittings and all types of parts and valves for high-temperature service. This standard applies to forged low-alloy steel and stainless-steel pipe parts that are used in pressure systems. It also includes several grades of low-carbon alloy steel and ferritic, martensitic, austenitic, and ferritic-austenitic stainless steels. Therefore, it needs to be selected according to the use and design requirements.

Basic Information on the F11 Steel

Although the F11 steel isn’t used as much as the F22 in the ASTM A182 category, this is still a popular type of steel used in numerous applications. The units are expressed in inch-pounds and SI units, and there are different types of the manufacturing process, including:

  • Low-alloy ferritic steels should be smelted in open hearth furnaces, electric furnaces, or through the basis-oxygen process.
  •  Stainless steel should be smelted via electric furnace or vacuum furnace.

Composition for the F11 :

C
Cr
Mn
Mo
P
S
Si
0.05-0.15%
1.00-1.50%
0.30-0.60%
0.44-0.65%
0.030-0.040%
0.040 max.
0.50-1.00%

Main Point of the Manufacture of the F11 Steel

Material for the steel needs to be forged as close as possible to the actual specified shape and size; when needing tees, U-bends, elbows, connecting tees, and any flange, these should not be processed directly from bars. The right alloy steel manufacture of these parts will make sure each part is made to the right specification so that you won’t have to be concerned about getting something sub-standard.

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