Haynes 188 (UNS R30188 / W.Nr 2.4683) | HB SPEICAL ALLOY

Haynes 188HB Special Alloy2022-04-10T18:42:04+08:00

Haynes 188 (UNS R30188 / W.Nr 2.4683)

Haynes 188 (UNS R30188 / W.Nr. 2.4683) is a cobalt-nickel-chromium-tungsten alloy that com- bines excellent high-temperature strength with very good resistance to oxidizing environ- ments up to 1095℃ for prolonged exposures, and excellent resistance to sulfate deposit hot corrosion. It is readily fabricated and formed by conventional techniques, and has been used for cast component. Other attractive features include excellent resistance to molten chloride salts, and good resistance to gaseous sulfidation.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Haynes 188	GH5188	–	Haynes 188	R30188	–	2.4683	KCN22W	–	–	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Co	W	La	Fe
Haynes 188	0.05-0.15	0.2-0.5	≤1.25	≤0.02	≤0.015	21.0-23.0	20.0-24.0	Bal	13.0-15.0	0.03-0.15	≤3.0

Typical Physical and Mechanical Properties (RT, Solution annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HRB
9.07	1330-1410	991	483	50.6	/

Available Products and Specifications

Rod, Bar, Wire and Forgings	AMS 5772
Plate, Sheet and Strip	AMS 5608
Pipe and Tube	–
Welding Product	–
Others	–

Features

Meets AMS 5608 specifications
Meets AMS 5772 specifications
Enormously beneficial high temperature strength
Provides oxidation resistance up to 2100° F
Excellent post-aging ductility
Galling resistant
Easily strengthened by cold deformation

Applications

Gas turbine operations
Combusters
Flame holders
Liners
Transition ducts
Exhaust frames