德国高温合金X8CrNiMoNb1616 NiCr20CbMo NiCr18Co CoCr20Ni20W 2.4602 2.4603 2.4605 2.4606 2.4607 2.4610 2.4611 2.4612 2.4613 2.4615 2.4616 2.4617 2.4618 2.4619 2.4620 2.4630 2.4631 2.4632 2.4634 2.4636 2.4639 2.4640 2.4641 2.4650 2.4651 2.4653 2.4654 2.4655 2.4656