What Is Sfa Number In Welding

• What Is Sfa Number In Welding Supply

This article provides information about F number in WeldingProcedure Specification based on the requirement of ASME Code Section IX.

4 Overview stainless steel consumables Classification Euronorm AWS/SFA C Si Mn Cr Ni Mo N others FN OK 61.20 EN 1600 E 19 9 L R 1 1 A5.4 E308L-16 0.026 0.7 0.7 19.2 9.6 0.10 5. ASME/SFA 5.4, SFA 5.9, and SFA 5.22 P No. 10H, Group 1 AWS/A5.4 E 2209-XX, A5.9 ER 2209, A5.22 E 2209T0-X NACE MR0175 Specifications. 2 Type 2205 Code Plus Two® Duplex Stainless Steel. Welding is good practice for all stainless steels. Dirt, oils, and paint can cause weld defects. CLASSIFICATION: AWS/SFA-5.10 ER4043, ISO 18273, S AI4043 IS-814: ER 4222 X,DIN 1913 E 4322R3. CHARACTERISTICS: ER 4043 is a general-purpose type aluminum welding wire. It is one of the oldest and most widely used welding and brazing alloys. These numbers 1 have been assigned to base metals and filler metals alike, grouping materials to reduce the number of welding procedures and welder performance qualification tests needed to qualify a wide range of materials (base metals and filler metals). The base metal grouping scheme consists of the P numbers and Group Numbers.

The F number grouping of filler metals refers to theirsimilarity on their usability characteristics. The usability determines theability of a welder to deposit a sound weld metal with a certain filler metal.

The F number is essential variable in the most weldingprocess for welding procedure specification and also in welding performancequalifications. Like the P number, the Fnumber designed to reduce the number of procedure qualification and weldingperformance qualification. Astrill4u download in china mac.

I have seen some many people confusing about F number andbelieving the F number is grouping for the similar chemical composition. Thisis not true, and F number is only about of usability characteristics such aswelding position.

F number in Welding Procedure Specification

Table QW-432 in ASME Code Section IX provides the list of Fnumbers. Any change from one F number in welding to the other F number is essentialvariable in the welding procedure specification. The changing from one F numberto other F number is a little bit different in welding performancequalification. The essential variable tables in welding performancequalification (QW-352 thru 357) refer you to the QW-433 for the range of qualification.

For example, a welder qualified with F number 4, he alsowill be qualified on the F numbers 1, 2 and 3.

Some contractors use the essential variable tables (QW-352thru 357) to minimize their costs. For instance, they might test the welder forstainless steel material by using carbon steel material. Consider the actualproject material is stainless steel and you do not want to waste stainlesssteel material for testing. You ask the welder to weld in carbon steel materialbut with stainless steel filler metal. Based on the essential variable table Pnumber 1 (Carbon Steel) qualifies P 8 (Stainless Steel), and the F number isthe same. So you qualify your welder for stainless steel material by usingcarbon steel material but stainless steel filler metal.

When you have a welder or welding operator with a certainqualification, and you want to use him in some other job, you need to see ifall the variables in the essential variable table confirm his qualification forthe new job. Each of the item in the table has veto right, if 6 out of 7 is Ok,but only 1 of them is not meeting the requirements, and then you cannot usethat welder in the new job and you need to re-qualify him by the new test.

The ASME Section IX Training Course is 2 days video training course and available online and the student that successfully pass the exam, receive I4I academy certificate with 16 hours training credit.

Related Links:

Nonessential Variables, Supplementary Essential Variables, A number in WPS

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What Is Sfa Number In Welding Supply

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