DATA SHEET

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2. Metallurgical properties RECOMMENDED MATERIALS 3. Nature of resultant weld or alloy The process of resistance makes it possible to join most metals, similar or dissim- 4. Weld strength ilar. Bonds of adequate strength are obtainable for an extremely wide range of applications. 5. Relative accuracy in control of welding conditions necessary Selecting of the proper alloy is a most important consideration in producing good welds at the required speed. The chart below is a valuable guide to this selection. The of metals as shown in the chart applies only when conventional spot weld- ing methods are used on similar thicknesses of material. However, many metal combina- The weldability of two materials as expressed in the following chart has been derived after tions which are listed as having a “poor weldability” may be satisfactorily joined by using a careful laboratory study and field survey of many factors which influence the welding or special setup or procedure. resultant weld of the metals. The factors include: There is a CMW® Alloy for each specific welding application. Experienced CMW engineers 1. Thermal and electrical conductivity will provide assistance with special problems.

Electrode Materials For SPOT WELDING Similar and Dissimilar Metals

Galva- Tungsten Cad- Phos- Alu- C. P. Mag- Nickel Stainless Chrome nized Terne Tin Scaly C. R. Silicon Nickel Cupro Brass Brass Alu- Molyb- Nickel mium Steel Steel phor Copper minum Tita- denum nesium Alloys Steel Steel Plate Zn. Plate Plate Plate Steel Bronze Bronze Silver Nickel Yellow Red Alloys minum nium II Commercially Pure A III II Titanium III 1

Aluminum CI E II E II H I H II E I D I D I ID E II D II D IID II E II H V C ICI 1 2 2 2 3 3 2S-3S 3 4 3 4 3 4 3 4 3 4 2 5 2 5 5 2 2 1 1 I 5 I 5 I 3 I 4 I 8 I 9 I 9 I 9 I 9 I I I I I I I I

I Aluminum Alloys CI E II E II H I H II E II D I ID ID E II D II D IID II E II E V D 1 Duralumin 1 2 2 2 3 3 3 43 43 43 4 3 2 5 2 6 2 2 1 52S-17S-24S I 5 I I 3 I 4 I 8 I 999I I I 9 I 4 I I 5 I I I I

I H II H I E II E II H IHII H II IH H IHIHII D II D II D II D II D II E II K V Copper—Pure 3 5 3 2 3 3 3 3 4 3 4 3 4 3 5 5 5 5 6 6 2 V V V V 6 V 4 V 4 V 9 V 999V V V 4 V 6 V 6 V 6 D 6 V V V

I 1 Brass—Red H I D II D II H II H II H II H I H II H I H II D IID II D II D II D II E II 5-25% Zinc II 5 V 6 V 6 V V V V 6 V 6 V 6 II 3 4 V 6 V 6 V 6 V II II 5 6

I Brass—Yellow E I D II D II H II H II E II E I IE II E I E II C II C II C II C II C II 25-40% Zinc II 5 IV 6 II 6 IV IV IV 6 IV 6 IV 6 IV 6 IV 3 4 IV 1 IV 1 IV 1 IV 1 II 1

II I I I D I C II C VI E I E II E II E I E II E I H II E II C II C II C II B II Cupro-Nickel II 2 5 II II II 2 II 2 8 II 2 II 2 II 2 II 2 II 7 II 3 II 1 II 1 II II 1

II I I I D I C II C VI E I E II E II E I E II E I H II E II C II C II B II Nickel Silver II 2 5 II II II 2 II 2 8 II 2 II 2 II 2 II 2 II 7 II 3 II 1 II 1 II 1

II I I I D I C II D II E I E II E II E I E II E I H II D II C II B II Silicon Bronze II 2 5 II II II II 8 II II II II II 7 II 3 II 1 II 1

II I I I Phosphor Bronze E I DIIDII E I E II E II E I E II E I H II D II B II Grades A, C, & D II 2 5 II II II II 8 II II II II II 7 II 3 II 1

I I C. R. Steel D II D II D II B II B II C II C I B II C I E II A II H. R. Steel—Clean II 3 II 3 II 3 III II 8 II II II 6 II II 7 II 1

II I l Scaly HII D I DIIDIIDID II DI E II I I I I I I I I H. R. Steel II 3 7 II 7 II 7 8 II 7 II 6 7 II 6 7 II 6 7 II 7

II I I E II EIDID II C I C II D II C I D II D I Tin Plate I 9 I 5 9 I 3 9 I 9 I I 8 I 9 I 6 9 I 6 9 I 6 9

I EIIEID I D II C II C II C II C I C I Terne Plate I 3 9 8 6 6 II 9 I 5 9 I I I I I I I ELECTRODES I WELDABILITY Galvanized Steel E II EIDIID II C II C II C I C II As a basis for comparison cold I - CMW® 28 Zinc Plate I I I I 9 II 5 9 II 3 II 9 I I 8 9 I 9 II 9 rolled (mild) steel has been II - CMW® 3 III - CMW® 100 chosen and its weldability BLOCK INTERPRETATION E II E I D I D II C II C II C I designated as “excellent.” IV - ELKONITE® 10W3 Cadmium Plate V - ELKON® 100M* I 9 I 5 I 3 I 9 I I 8 I 9 A - Excellent E - Poor B - Very Good H - Very Poor WELD- ELECTRODE VI - ELKONITE® 1W3 or TC-5 III C - Good K - Impractical ABILITY AGAINST D I I D II D II B II B II *ELKON® 100 W may be substituted. Chrome Plate D - Fair I I 8 II 8 II 8 II 8 II 8 ELKONITE® 10W3 or TC-10 may be interchanged. ELECTRODE SPECIAL III INFORMA- Electrode materials in circles are DI I D II D III A II ELECTRODES AGAINST TION second choice. II III 1 18-8 Type I 2 5 II I II I - CMW® 28 II - CMW® 3 SPECIAL INFORMATION D II C II B II III - CMW® 100 1. Good weld strength. Nickel IV - ELKONITE® 10W3 2. May be welded under special conditions. Grade A 2 1 1 II 5 II II V - ELKON® 100M* 3. Low weld strength. VI - ELKONITE® 1W3 or TC-5 4. No actual weld nugget occurs, a “stick” is Nickel Alloys D II B II obtained. Monel Nichrome *ELKON® 100 W may be substituted. 5. Welding conditions must be accurately 2 1 (High Res.) II 5 II ELKONITE® 10W3 or TC-10 may be controlled. interchanged. 6. Keep electrode clean to prevent sticking D I to the work. Magnesium Electrode materials in circles are 7. Good practice recommends cleaning Alloys I 1 5 second choice. steel before welding. 8. Use one flat tip to minimize distortion or D II discoloration. Molybdenum 9. Coating may dissolve in other metals or Tungsten II 2 5 burn away.

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