overview

Stainless steel grade F55 has excellent corrosion resistance to a wide range of areas, especially resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with critical pitting temperature that is more than 50°C (122°F). This material is known to also have high strength and extended lifecycle. It is 10% lighter than grade 316 steel, ideal for sub-zero service, and more cost effective than nickel alloys. Stainless steel grade F55 can be easily machined and welded.

Limiting Chemical Composition, %

Iron.............................................................................................................................................................................................Balance

Chromium......................................................................................................................................................................................26.00

Nickel................................................................................................................................................................................................8.00

Molybdenum.....................................................................................................................................................................................4.00

Manganese.......................................................................................................................................................................................1.00

Silicon................................................................................................................................................................................................1.00

Copper...............................................................................................................................................................................................1.00

Tungsten............................................................................................................................................................................................1.00

Nitrogen.....................................................................................................................................................................................0.30 max.

Carbon........................................................................................................................................................................................0.03 max.

Sulfur.........................................................................................................................................................................................0.015 max.

Phosphorous.............................................................................................................................................................................0.035 max.

Physical Constants

Below are some physical constants and thermal properties of

Mechanical properties

Corrosion Resistance

Stainless steel F55 has a very good corrosion resistance. Use in media causing pitting or stress corrosion cracking is possible because tungsten increases pitting resistance. The PREN values (chromium sum) can be> 40 according to the chemical analysis.

Heat Treatment

The heat treatment of the Stainless steel F55  is carried out by solution annealing in the range 1040-1120°C with rapid cooling in sufficient water and this is also recommended after welding larger cross sections.

WELDING

The steel 1.4501 is weldable with all processes (TIG welding, MAG solid wire, arc welding, submerged arc welding). The exception is gas-melt welding! There is a risk of intermetallic compounds. Welding consumables, predominantly similar electrodes, should be used in welding, as they increase elongation properties at high temperatures. However, a change in the corrosion properties is to be expected in the area where the weld took place (heat-affected zone).

Available Forms

We provide you with a variety of product forms, including but not limited to

● Bar & Rod

● Pipe & Tube

● Coil & Strip

● Plate & Sheet & Circle

● Wire & Welding

● Fitting (Flange, Elbow, Tee...)

● Customize