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430 · 铁素体 · 成型 · 选型

430 铁素体不锈钢:成本与成型性的边界

430 不含镍、成本低,适合家电与室内装饰,但成型性、焊接性与低温韧性弱于 304,深冲与承压场景需谨慎。
430 为 16–18%Cr 铁素体不锈钢,不含镍,价格受镍价影响小,常用于家电面板、餐具、建筑内装与汽车装饰。 优点:成本低、耐一般大气腐蚀、导热好、热膨胀系数低。 限制:1)成型性不如奥氏体,深冲易开裂,r 值与延伸率有限;2)焊接后热影响区晶粒粗化、韧性下降,承压或疲劳工况不建议;3)低温脆性转变明显,寒冷环境慎用;4)表面易出现起皱(ridging),对高表面要求需选材与工艺配合。 采购时建议明确表面等级、成型工序与是否需要焊接,避免用 304 的验收标准套 430。
Compiled by SteelWe editors and industry experts. For industry exchange only; not trading or investment advice. Cite the source when quoting.
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