The Weld Cracking Susceptibility Assessment Calculator is a practical engineering tool designed to evaluate the potential risk of hydrogen-assisted cold cracking in steel welding applications. Using established formulas such as IIW Carbon Equivalent (CEV) and Pcm, this calculator helps welding engineers assess material hardenability, chemical composition, and cracking susceptibility. By entering steel alloying elements, plate thickness, diffusible hydrogen levels, welding heat input, and preheat temperature, users can identify potential cracking factors and evaluate welding conditions. Ideal for welding engineers, metallurgists, steel fabricators, and quality control professionals, the Weld Cracking Susceptibility Assessment Calculator supports preliminary weldability analysis, welding procedure planning, and material selection. Improve welding quality, reduce potential cracking concerns, and optimize fabrication processes with reliable, formula-based engineering assessments.

Material and assessment options

All three assessment modules run together. Calculated quantities and qualitative observations are reported separately.

Mode A · IIW CEV CalculatedCarbon equivalent indicating HAZ hardenability
Mode B · Pcm CalculatedComposition-based crack susceptibility index
Mode C · Screening QualitativeHydrogen cracking factor review, no probability

Chemical composition

Enter weight percent (wt.%) from the mill test certificate or product analysis. Enter 0 only for a confirmed absence. Blank fields are not assumed to be zero.

1 ppm = 0.0001 wt.%

Welding conditions

These inputs feed the qualitative screening (Mode C). Heat input is optional, but the other factors are needed for a screening outcome.

Thickness of the thicker part at the joint. Combined thickness methods (for example EN 1011-2) are not applied.
Descriptive categories only. They do not replace a quantitative restraint analysis.
Measured or specified, per 100 g of deposited weld metal (for example ISO 3690 or AWS A4.3).
Designators from AWS A5.x filler specifications and ISO consumable standards state a maximum, not a measured value. If HD is blank, the designator maximum is used and labelled as such.

Welding heat input

Factors as tabulated in EN 1011-1 / ISO/TR 17671-1. Other codes may define heat input differently, so confirm against the governing standard.

Temperatures

The actual or planned preheat. The required preheat is not calculated.