Is there some way to set a global default value for the length of animations in SVG

Is there some way to set a global default value for the length of
animations in SVG

I want to set a global value for the duration of animations in SVG,
perhaps via CSS. However the code below does not set the desired duration.
<style>
.animate {
dur: 5s
}
</style>
<animateTransform class="animate" id="at1" attributeName="transform"
type="translate" begin="showLine.begin+0s" fill="freeze" from="0,100"
to="0,500"/>
Is there some way to set a global default value for the length of
animations in SVG? Thanks.