What voltage range is recommended for welding 5/16 inch stainless steel using short circuit?

When welding 5/16 inch stainless steel using the short circuit transfer method, the recommended voltage range typically falls between 21 to 22 volts. This voltage range is optimal because it provides sufficient arc stability and heat input needed to effectively melt the base metal without causing excessive burn-through or deformation, which can be critical when working with stainless steel due to its heat sensitivity and tendency to warp.

In short circuit transfer, the wire electrode touches the base metal periodically to complete the circuit, which helps to control the welding process. The selected voltage in this range allows for better control over the penetration and bead profile, ensuring a strong and consistent weld.

The other voltage ranges provided are generally too low or too high for this thickness of stainless steel when using the short circuit method. Lower voltages may lead to insufficient heat, resulting in poor penetration and ineffective fusion of the weld, while higher voltages could increase the risk of burn-through and create an unstable arc. Hence, the selection of 21 to 22 volts is critical for achieving a strong, quality weld on 5/16 inch stainless steel.