RS-2 (0Cr20Ni26Mo3Cu3Si2Nb)

RS-2 sulfuric acid resistant stainless steel is a Cr Ni Mo Cu austenitic stainless steel gradually evolved in the past 60 years. The characteristic of this steel is to improve the corrosion resistance of stainless steel in sulfuric acid and other media by using the complex effect of trace elements to improve the performance of stainless steel passive film without increasing the total amount of alloy.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
RS-2	00Cr25Ni20Mn3Mo3N	–	–	–	–	–	–	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Mo	Cu	Fe
RS-2	≤0.06	≤2.0	≤1.0	≤0.035	≤0.030	17.0-22.0	24.0-28.0	2.0-3.0	2.0-3.0	Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.0	1130-1280	≥568	≥313	≥35	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM A182
Plate, Sheet and Strip	ASTM A312
Pipe and Tube	ASTM A167, 240
Welding Product	–
Others	ASTM A403

Features

This is an austenitic stainless steel with low alloy content and good corrosion resistance

Applications

The castings of plate heat exchanger, wire mesh demister and acid resistant pump made of this material are widely used in sulfuric acid, phosphoric acid and phosphate fertilizer industries.