I guess Tenryu is a brand? No I havn't used them.
One of My friends used a carbide steel cutting blade to scrap out an old steel boiler, I lent Him a worm drive circular saw similar to a Skillsaw, but it turns slower. It did work for a while, but He figured sawing through the welds killed the blade.
Another friend got one of those German made steel cutting circular saws and was using it to cut 1" thick steel plate. They really arn't rated for this thickness. Altho it worked fairly well, He later decided that it was not the best way for this particular job.
Still another friend has a Dewalt carbide blade chopsaw, He likes it.