The Ferritic Solution - Euro Inox
The Ferritic Solution - Euro Inox
The Ferritic Solution - Euro Inox
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SucceSSfuL dRawinG MeanS<br />
• the absence of fracture<br />
• excellent surface aspect<br />
• Minimum material consumption<br />
• high fabrication productivity<br />
• low tool wear<br />
<strong>The</strong> ldr FacTor<br />
the limited drawing ratio (ldr) is an important deep-<br />
drawability parameter.<br />
limited drawing ratio (ldr) refers to the quotient of the<br />
maximum blank diameter (d) that can be deep drawn into<br />
a cylinder in one step and the diameter of that cylinder.<br />
ldr = d/d.<br />
Limited drawing ratio (Ldr)<br />
D<br />
“<strong>Ferritic</strong>s have higher LDR values<br />
than austenitics,<br />
which makes them particularly<br />
suitable for drawing.”<br />
d<br />
Microwave oven, in grade 430, BA finish, S. Korea.<br />
ferritics have higher ldr values than austenitics, which<br />
makes them particularly suitable for drawing.<br />
limited drawing ratio (LDR)<br />
2.20<br />
2.15<br />
2.10<br />
2.05<br />
2.00<br />
StRetch-foRMinG feRRitic GRadeS<br />
ferritic grades are inferior to austenitics in pure stretch-<br />
forming.<br />
LDR gRaDe compaRison<br />
409 430 439 441 304<br />
Stretch forming<br />
in stretch-forming, the drawn area becomes thinner.<br />
the table below compares the stretching performance<br />
of various grades “dome height” refers to the maximum<br />
degree of deformation before “necking” (the phase just<br />
before failure) of a blank undergoing stretching.<br />
dome height (K50) in mm<br />
35.0<br />
30.0<br />
25.0<br />
20.0<br />
15.0<br />
Stretch-forming performance<br />
Dome height (K50) for different stainless steels<br />
409 430 439 441 304
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