Tools · Solidification Cracking

WRC-1992 / Schaeffler / Suutala Diagram

Enter the composition of up to three alloys (e.g. base metal, filler, and a second base metal for dissimilar joints) and a single dilution value. The tool calculates Creq/Nieq for each diagram, plots tie lines between them, and estimates the diluted weld metal's solidification mode, Schaeffler phase, and solidification-cracking risk (including a rapid-solidification/laser-welding comparison).

⚠ Disclaimer: Use at Your Own Risk This tool is provided "as is," for general engineering reference and educational purposes only, with no warranty of any kind, express or implied, including any warranty of accuracy, completeness, or fitness for a particular purpose. Creq/Nieq formulas are the standard published Schaeffler and WRC-1992 equivalents; the boundary lines, iso-FN, and %ferrite contours are engineering approximations reconstructed from the published Kotecki & Siewert (1992) and Schaeffler (1949) figures (see the sourcing note below the charts) and are not a certified or pixel-exact digitization. Jeffrium and Jeffrey Sowards assume no liability for decisions, designs, procedures, or outcomes based on this tool's output. Do not use these results as the sole basis for procedure qualification, code compliance, safety-critical, or contractual decisions; verify independently against current reference standards (e.g. AWS A4.2, ASME Section IX) and, where required, qualified testing. Use of this tool is entirely at your own risk.
Dilution

Filler contributes the remainder: 70%

-

WRC-1992 Diagram

Creq = Cr + Mo + 0.7·Nb  ·  Nieq = Ni + 35C + 20N + 0.25Cu

Diluted Weld Metal Composition

Boundary and contour lines are approximate, reconstructed from D.J. Kotecki & T.A. Siewert, "WRC-1992 Constitution Diagram for Stainless Steel Weld Metals," Welding Journal 71(5), 1992; A.L. Schaeffler, "Constitution Diagram for Stainless Steel Weld Metal," Metal Progress 56, 1949; and N. Suutala's solidification-cracking work as compared against rapid-solidification (laser) behavior in the Lippold/Pacary literature. The Suutala/Lippold cracking-lobe boundaries are a first-pass hand-estimate from the source figures, not yet a calibrated digitization, so treat the exact threshold position as indicative only until refined. It is not a certified digitization; see disclaimer above.

Need a tool built around your exact alloys and process?

This calculator is free to use. If you need a custom calculation, a proprietary alloy model, or procedure-specific analysis for your program, that's exactly the kind of work Jeffrium takes on.

Discuss a custom tool