NIPPON KOSHUHA STEEL CO., LTD.

It is steel to which acid resistance and seawater are improved with stainless steel of the 2 phase system that adds Ni to ferrite system 24Cr steel.
High frequency sign	JIS sign	Chemical composition(%)									Character and usage
High frequency sign	JIS sign	C	Si	Mn	P	S	Ni	Cr	Cu	Mo	Character and usage
U329J1	SUS329J1	0.08 or less	1.00 or less	1.50 or less	0.040 or less	0.0 under-30	3.00～ 6.00	23.00～ 28.00	3.00～ 5.00	1.00～ 3.00	It has two aspect organization, and it excels in acid resistance and a pitting corrosion and it has the high intensity. For seawater etc.