F61 (UNS S32550 / W.Nr. 1.4507)

F61 (UNS S32550 / W.Nr. 1.4507) steel compared with F53 and F55 steels it delivers increased strength and corrosion performance. Its minimum yield strength exceeds 550Mpa, whereas other grades are limited to 550Mpa. In addition, it contains up to 2.0% of copper, which aids pitting corrosion resistance.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
F61	–	–	F61	S32550	X2CrNiMoCuN25-6-3	1.4507	–	–	–	2205

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Mo	N	Cu	Fe
F61	≤0.04	≤1.0	≤1.5	≤0.04	≤0.03	24.0-27.0	4.5-6.5	2.9-3.9	0.1-0.25	1.5-2.5	Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.0	1030-1130	≥750	≥550	25	/

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

High performance 25% chromium super duplex (austenitic/ferritic) steel with 1.75% copper. Good strength/ductility combinedwith high resistance to all forms of corrosion.