Because of their increased strength, alloy steel F11 pipe flanges may need greater forming pressures. Alloy Steel F11 Slip On Flanges are annealed by submerging completely at 1725°F to 1850°F (941°C to 1010°C), water quenched, and only hardening by cold work. Aging of Alloy Steel A182 F11 Flanges is a time/temperature dependent response, where the temperature is more significant than time, as is true of other heat treatment techniques.
Alloy Steel F11 Weld Neck Flanges were designed for maximum resistance to acid attack and demonstrate exceptional resistance to stress corrosion cracking in boilers containing 20% to 40% sulfuric acid. It also has exceptional general corrosion resistance to sulfuric acid and to chloride stress corrosion cracking.
Characteristics of Alloy Steel A182 F11 Flanges
Alloy Steel F11 Blind Flanges are readily manufactured using standard industrial procedures and have good mechanical properties at both ambient and elevated temperatures, up to about 930°F (500°C). Protective atmospheres are not necessary during the annealing or aging processes since Alloy Steel A182 F11 Flanges are essentially carbon-free.
The high stability of alloy steel F11 lap joint flanges during annealing and aging results in predictable, consistent shrinkage on all dimensions. In comparison to other stainless steels containing molybdenum, Alloy Steel F11 Ring Joint Type Flanges exhibit greater resistance to the precipitation of the ferrite and sigma phases during cooling and welding.
Specifications of F11 Flanges
- Specifications: ASTM A182 / ASME SA182
- Size: 1/2″ (15 NB) to 48″ (1200NB)
- Standards: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
- Class / Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
- Standard: ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
When necessary, tees, U-bends, elbows, connecting tees, and any flange should not be processed directly from bars but rather should be forged as closely as possible to the actual stipulated shape and size. You won't have to worry about acquiring a subpar item because the right alloy steel manufacturer will ensure that each part is built to the proper specifications.
Applications & Uses
The F11 steel is still a widely utilized form of steel, even though it isn't used as frequently as the F22 in the ASTM A182 category. There are various manufacturing processes, and the units are stated in inch-pounds and SI units, including Low-alloy ferritic steels, should be smelted using the basis-oxygen method, electric furnaces, or open hearth furnaces. It is best to melt stainless steel in an electric or vacuum furnace.
