How do you calculate welding capacity?

The volume can then be calculated by multiplying the length of the weld by the area – ensuring that this length is also given in centimetres! Conventionally, the volume is often expressed in cubic centimetres ( per metre so in this example the volume is 507 cu. cm/metre.

How much can a weld hold?

A common rule of thumb is to limit load to 10 KSI on mild steel parts [including welds].

What is weld strength?

fw = shear strength of the weld metal is a function of the electrode used in the SMAW process. – The tensile strength of the weld electrode can be 60, 70, 80, 90, 100, 110, or 120 ksi. This is the standard terminology for weld electrodes. ▪ The strength of the electrode should match the strength of the base metal.

What is the maximum size of weld?

Explanation: The maximum size of fillet weld is obtained by subtracting 1.5mm from thickness of thinner member to be jointed. The maximum size of weld should not be more than 3/4 of the thickness of section at toe when welds are applied to round toe of steel sections.

How do I calculate how much welding rod I need?


  1. Calculate the weld area (cross section of the weld) including root and cap reinforcement in square millimetres.
  2. Multiply weld area by pipe circumference (weld length) to give a weld volume in cubic millimetres.
  3. Divide this answer by 1,000,000,000 to give weld volume in cubic metres.

Is welding stronger than bolting?

Welded joints are normally stronger than bolted joints, in great part because their material does not have the perforations needed for bolted joints. The manufacturing process is the determining factor when it comes to joint strength: bolted joints offer simplicity, but welded joints provide higher strength.

What type of welding is strongest?

What is the strongest weld? The absolute strongest weld that can be made in routine applications would be a type of weld made via the welding technique of Tungsten Inert Gas (TIG) Welding, also known as GTAW welding. TIG welders are known for creating clean and strong welds.

What is the weakest part of a weld?

HAZ is often the weakest area in the as-welded joint, except where there are obvious defects in the weld deposit, most welding failures originate in the heat-affected zone. Residual Stress: is the result of restraint to thermal expansion and contraction offered by the pieces being welded.

How strong is weld?

The short answer is, assuming your joint is designed properly and you have an experienced welder performing the work, your welded joint will be as strong as the base materials it is joining. MIG welding creates an arc between a continuously fed wire filler metal and the workpiece.

What is the minimum fillet weld size?

“The minimum length of a fillet weld shall be at least four times the nominal size, or the effective size of the weld shall be considered not to exceed 25% of its effective length.” If the nominal size of a fillet weld is 10 mm then the minimum length of the fillet weld is 40 mm.

What is the maximum fillet weld size?

The maximum size of fillet weld is obtained by subtracting 1.5mm from the thickness of the thinner member to be jointed. When welds are applied to round toe of steel sections, the maximum size of the weld should not be more than 1/3 of the thickness of the section at toe.

How to find the capacity of a weld?

Section J2.4(c) of the specification expands on J2.4(a) and allows you to sum the capacities of the various weld length segments using SCM equation J2-9a (not using the SCM equation J2-5 modifier) to find the capacity of the weld group.

Is there limit to strength of CJP welds?

For CJP welds, the limit state of weld strength will never control since both the weld and the base metal have the same effective area and the filler material is constrained to be stronger than the base metal. Consequently, only the capacity of the base metal is of concern.

Which is the largest effective fillet weld size?

The largest effective fillet weld size will be the size where the weld strength equals the base metal strength: 2(0.6FEXX) teL >(0.60Fu) tBML After performing the algebra, we get a relationship between weld size and base metal thickness. te= 0.707 a >0.5 (Fu/ FEXX) tBM

How to calculate the effective area of a weld?

To get A (effective area of the weld) we need to multiply the theoretical throat size (1/4 x 0.707 = 0.177 inches) times the length (20 inches) times 2 welds. The effective area equals 20in x 0.177in x 2 = 7.08 sq-in.