What is an F number in welding?

The F Number: F number grouping (for filler metals) is done to reduce the number of welding procedure specification (WPS) and welder performance qualifications. Basis for F number grouping is usability characteristics.

PNumbers apply for base materials, FNumbers apply for filler metals. Each is “grouped” into alloy “families” as indicated in ASME Section IX.

Additionally, what is a number in welding? A number gives a similar chemical composition in a “as weld” condition. The A number is essential variable in most of welding process in ASME Code Section IX. Please note the A number in WPS does not refer to the filler wire or electrode chemical composition; it refers to the deposited weld metal chemical composition.

Considering this, what does F mean in welding?

The F number grouping of filler metals refers to their similarity on their usability characteristics. Like the P number, the F number designed to reduce the number of procedure qualification and welding performance qualification.

What is SFA number in welding?

SFA is a universial classification system for filler materials. 5.1 is for carbon steel electrodes for SMAW, hence the designation E-6013. These type of specifications provide for uniform identification but I’ll be darned if I know what “A/SFA” actually stand for.

What is ASME Section IX?

“Section IX of the ASME Boiler and Pressure Vessel Code relates to the qualification of welders, welding operators, brazers, and brazing operators, and the procedures that they employ in welding and brazing. . . “

What is P number and group number?

Base Metals: The P Number This number is used to group similar Base Metals, allowing qualification of an entire selection versus qualification of just one. These base metals are grouped by material and assigned P Numbers based on what material they are.

What is P number in material?

Ferrous metals which have specified impact test requirements have been assigned Group Numbers within P-Numbers. When a base metal with a UNS number Designation is assigned a P-Number, then a base metal listed in a different ASME material specification with the same UNS number shall be considered that P-Number.

What is WQT in welding?

Welding Inspection / Welders Qualification Test (WQT) / Quality Assurance & Quality Control (QA/QC) Witness qualification of welders and certify those who qualified the testing. Control quality of work in progress and check/witness every stage of work based on standards.

What is QW in welding?

QW 250 refers to Weld Data and QW 350 refers to Welding variables for welders. It defines the essential, nonessential, and supplementary variables for each welding process. QW-350 Welding variables applicable to welder and welding operator qualification.

What P number is Monel 400?


What P number is Inconel 625?

INCONEL® nickel-chromium alloy 625 (UNS N06625/W.Nr. 2.4856) is used for its high strength, excellent fabricability (including joining), and out- standing corrosion resistance.

What are essential variables in welding?

In most of welding process, The P number, F number, A number PWHT, thickness (out of specified range) are essential variable.

What is non essential variables in welding?

Note, that as we said previously, essential variables are those that have a significant influence on the mechanical properties, such as tensile strength and ductility. Nonessential variables are those that do not have a significant influence on tensile strength or ductility of the completed weld.

What is F number in WPS?

The F Number: F number grouping (for filler metals) is done to reduce the number of welding procedure specification (WPS) and welder performance qualifications. Basis for F number grouping is usability characteristics.

What is P number in WPS?

The P number in welding assigned to the material by ASME Code Section IX to reduces the number of welding procedure qualification. So your WPS can be used for group of material and not a single material. This P number assignment reduces the number of PQR remarkably.

How do you read welding electrode codes?

The prefix “E” designates an arc welding electrode. The first two digits of a 4-digit number and the first three digits of 5-digit number indicate minimum tensile strength. For example, E6010 is a 60,000 psi tensile strength electrode while E10018 designates a 100,000 psi tensile strength electrode.

How are welding electrodes classified?

Electrodes are manufactured for different purposes and welding types and are classified by a five-digit number like E7011-M. Each number and letter corresponds with a piece of information, including recommended welding position, tensile strength and penetration depth. The “E” in the classification stands for electrode.