Ultimet (UNS R31233 / W.Nr. 2.4681)

Ultimet alloy (UNS R31233 / W.Nr. 2.4681) provides a unique blend of properties. From a wear stand- point, it behaves like the Stellite alloys with lower carbon contents. From a corrosion standpoint, it possesses many of the attributes of the C-type and G-type Hastelloy materials, in particular outstanding resistance to chloride-induced pitting and crevice corrosion. Its mechanical and welding characteristics are much closer to those of the Hastelloy alloys than those of the Stellite alloys, whose low ductilities can be problematic.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Ultimet	–	–	Ultimet	R31233	–	2.4681	–	–	–	–

Chemical Composition, %

Alloy

Ultimet

0.02-0.10

0.05-1.00

0.1-1.5

≤0.03

≤0.02

23.5-17.5

7.0-11.0

Bal

4.0-6.0

1.0-3.0

≤0.015

0.03-0.12

1.0-5.0

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
8.47	1330-1350	950	490	47	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM B815
Plate, Sheet and Strip	ASTM B818, ASME SB818
Pipe and Tube	–
Welding Product	–
Others	–

Features

Particular outstanding resistance to chloride-induced pitting and cretive corrosion
Exceptional resistance to galling, cavitation erosion, slurry erosion, liquid droplet impact. Ideal welding material with exceptional ductility and resistance to weld cracking, very easy to apply as an overlay, multiple layers appliable with little to no preheat.