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Material

S420

Alloy

Fe / C / Si / Mn

Wire feedstock(s)

SG2-SupraMIG

Summary

S420 is a structural steel with high strength, good ductility and excellent weldability, which makes it suitable for WAAM. This material is widely used in the construction industry and in other structural applications.

Mechanical properties
WAAM (build direction)
Compared to traditional S420
Yield Strength
409 MPa
420 MPa
Ultimate Strength
524 MPa
480-620 MPa
Elongation
27%
20%
Printing strategy
Straight lines
Heat treatment
As built
The above mentioned mechanical properties can vary according to design changes, process parameters optimization and strategy selection.
Use cases at RAMLAB

General remarks
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General explanation
Printing strategies
Straight lines strategy: several welding beads overlapped next to each other
Oscillation: continuous zig-zag bead that fills the entire layer

Heat treatement
Stress relief: due to the high residual stresses build up in the WAAM product, this heat treatment is necessary to minize residual stresses.