CD & SC Stud Welding

CD and Short Cycle Stud Welding Overview

CD and Short Cycle Studs are very similar in form and function. There are subtle differences in the weld end geometry, however the stud material properties and welded stud strength characteristics are almost identical. The user should ensure that the correct stud is being purchased for the type of equipment being used.

Mild steel CD studs are normally manufactured from low carbon mild steels in the C1006 - C1010 range. Mild steel material is typically 55,000 psi minimum ultimate and 35,000 psi minimum yield. Stainless steel CD studs are normally manufactured from 18/8 stainless steels (302HQ, 304, 305). Stainless steel material is typically 75,000 psi minimum ultimate and 30,000 psi minimum yield. Aluminum CD studs are normally manufactured from 5000 series aluminum alloy (5356, 5154), with material properties of 40,000 psi minimum ultimate and 29,000 psi minimum yield. Click here for CD stud torque strength and load strength data.

Stainless steel studs materials most commonly used are types 304 or 302HQ. Other 300 series grades (except 303) are also available when required.

Threads are manufactured to UNC-2A or UNF-2A class of fit (prior to plating) for inch sizes and 6g class of fit for metric sizes.

There is no appreciable change in length of CD studs... studs 1.0" length before weld will be 1.0" long after weld.

CD Stud Weldability Guide

CD Stud/Base Metal Combination Welding Capabilities

Mild Steel (1006-1030) Excellent Excellent N/A Excellent
Medium Carbon Steel Good* Good* N/A Good*
Galvanized Duct Excellent Excellent N/A Excellent
Structural Steel Excellent Excellent N/A Excellent
Stainless Steel (300) Excellent Excellent N/A Excellent
Aluminum Alloys N/A N/A Excellent N/A
Die-Cast Zinc Alloys Good* Good* Excellent Good*

* Generally full strength results, depending upon the combination of stud size and base metal.

CD Reverse Side Marking Limitations

Finding the Optimum Combination of Stud Size and Base Metal Thickness

To prevent reverse-side marking when stud welding, it's important to select the right combination of stud size and base metal thickness. The following charts and explanations provide guidance for achieving optimal results.

Chart Legend

  • Excellent

    No reverse-side marking, excellent weld quality.

  • Acceptable

    Visible markings, but weld quality remains excellent.

  • Unacceptable

    Unacceptable marking, base metal failure likely.

Note: These recommendations are based on ideal laboratory conditions. For best results, it's recommended to conduct test welds under actual production conditions before final design and specification.

BASE METAL THICKNESS

Click the charts to expand.

  • KEYREV2
    Excellent
  • KEYREV3
    Acceptable
  • KEYREV1
    Unacceptable

MILD STEEL

Base metal mild steel, stud flanged or mini-flanged.

STAINLESS STEEL

Base metal stainless steel, stud flanged or mini-flanged.

ALUMINUM ALLOY

Base metal aluminum alloy, stud flanged, or mini-flanged.

Note: Stud tip size can have a significant effect on the amount of reverse side marking.

CD Fixturing

  1. Spacers are required to allow weld gases to escape.
  2. Footpiece (part no. 023-252) supplied with CD system.
  3. Jig Locating Bush (part no. 650-691) supplied with system.
  4. Adjustable Leg (part no. 000-355) supplied with system.
  5. Template to be made as required by Customer.

This is the simplest form of fixturing using the standard hand held Bantam CD weld gun. For greater accuracy template adaptors can be fitted directly to the front of the gun, the gun can be mounted in a drill stand or alternatively an automatic feed CD weld head can be used in place of the hand gun.

Consult with the factory for other options.

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