is 17 4 ph stainless the same as 304 なお、固溶化熱処理状態では弱磁性ですが、析出硬化処理後はかなり強い磁性を示すようになりますのでご注意ください。 Chilly Rolling: Performed at ambient temperature, this method improves the steel’s strength and toughness, which makes it appropriate for